diff --git a/hardware/LEDborg/78-ledborg.js b/hardware/LEDborg/78-ledborg.js
index dea2ebe9..2ff233a8 100644
--- a/hardware/LEDborg/78-ledborg.js
+++ b/hardware/LEDborg/78-ledborg.js
@@ -8,23 +8,26 @@ module.exports = function(RED) {
     var LedBorgInUse = false;
 
     var gpioCommand = __dirname+'/nrgpio';
+    var allOK = true;
 
     try {
         var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
-        if (cpuinfo.indexOf(": BCM") === -1) { throw "Info : "+RED._("rpi-gpio.errors.ignorenode"); }
+        if (cpuinfo.indexOf(": BCM") === -1) {
+            RED.log.warn("ledborg : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+            allOK = false;
+        }
+        else if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
+            RED.log.warn("ledborg : "+RED._("node-red:rpi-gpio.errors.libnotfound"));
+            allOK = false;
+        }
+        else if ( !(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
+            RED.log.warn("ledborg : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:gpioCommand}));
+            allOK = false;
+        }
     }
     catch(err) {
-        throw "Info : "+RED._("rpi-gpio.errors.ignorenode");
-    }
-
-    if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
-        util.log("[rpi-ledborg] Info : Can't find RPi.GPIO python library.");
-        throw "Warning : Can't find RPi.GPIO python library.";
-    }
-
-    if ( !(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
-        util.log("[rpi-ledborg] Error : "+gpioCommand+" needs to be executable.");
-        throw "Error : nrgpio must to be executable.";
+        RED.log.warn("ledborg : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+        allOK = false;
     }
 
     // GPIO pins 11 (R), 13 (G), 15 (B).
@@ -95,46 +98,50 @@ module.exports = function(RED) {
             }
         }
 
-        node.child = spawn(gpioCommand, ["borg","11"]);
-        node.running = true;
-        node.status({fill:"green",shape:"dot",text:"OK"});
+        if (allOK === true) {
+            node.child = spawn(gpioCommand, ["borg","11"]);
+            node.running = true;
+            node.status({fill:"green",shape:"dot",text:"OK"});
 
-        node.on("input", inputlistener);
+            node.on("input", inputlistener);
 
-        node.child.stdout.on('data', function (data) {
-            if (RED.settings.verbose) { node.log("out: "+data+" :"); }
-        });
+            node.child.stdout.on('data', function (data) {
+                if (RED.settings.verbose) { node.log("out: "+data+" :"); }
+            });
 
-        node.child.stderr.on('data', function (data) {
-            if (RED.settings.verbose) { node.log("err: "+data+" :"); }
-        });
+            node.child.stderr.on('data', function (data) {
+                if (RED.settings.verbose) { node.log("err: "+data+" :"); }
+            });
 
-        node.child.on('close', function () {
-            node.child = null;
-            node.running = false;
-            node.status({fill:"red",shape:"circle",text:""});
-            if (RED.settings.verbose) { node.log("closed"); }
-            if (node.done) { node.done(); }
-        });
+            node.child.on('close', function () {
+                node.child = null;
+                node.running = false;
+                node.status({fill:"red",shape:"circle",text:""});
+                if (RED.settings.verbose) { node.log("closed"); }
+                if (node.done) { node.done(); }
+            });
 
-        node.child.on('error', function (err) {
-            if (err.errno === "ENOENT") { node.warn('Command not found'); }
-            else if (err.errno === "EACCES") { node.warn('Command not executable'); }
-            else { node.log('error: ' + err); }
-        });
+            node.child.on('error', function (err) {
+                if (err.errno === "ENOENT") { node.warn('Command not found'); }
+                else if (err.errno === "EACCES") { node.warn('Command not executable'); }
+                else { node.log('error: ' + err); }
+            });
 
-        node.on("close", function(done) {
+            node.on("close", function(done) {
+                LedBorgInUse = false;
+                node.status({fill:"red",shape:"circle",text:""});
+                if (node.child != null) {
+                    node.done = done;
+                    node.child.stdin.write(" close 11");
+                    node.child.kill('SIGKILL');
+                }
+                else { done(); }
+            });
+        }
+        else {
             LedBorgInUse = false;
-            node.status({fill:"red",shape:"circle",text:""});
-            if (node.child != null) {
-                node.done = done;
-                node.child.stdin.write(" close 11");
-                node.child.kill('SIGKILL');
-            }
-            else { done(); }
-
-        });
-
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
+        }
     }
     RED.nodes.registerType("ledborg",LedBorgNode);
 }
diff --git a/hardware/LEDborg/package.json b/hardware/LEDborg/package.json
index 787b388a..f291c0fe 100644
--- a/hardware/LEDborg/package.json
+++ b/hardware/LEDborg/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-ledborg",
-    "version"       : "0.0.18",
+    "version"       : "0.0.19",
     "description"   : "A Node-RED node to control a PiBorg LedBorg board for a Raspberry Pi.",
     "dependencies"  : {
     },
diff --git a/hardware/PiLcd/package.json b/hardware/PiLcd/package.json
index 22668892..2df7e705 100644
--- a/hardware/PiLcd/package.json
+++ b/hardware/PiLcd/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-pilcd",
-    "version"       : "0.0.8",
+    "version"       : "0.0.9",
     "description"   : "A Node-RED node for Raspberry Pi to write to HD44780 style LCD panels.",
     "dependencies"  : {
     },
diff --git a/hardware/PiLcd/pilcd.js b/hardware/PiLcd/pilcd.js
index 0ecde55d..2dcfd72b 100644
--- a/hardware/PiLcd/pilcd.js
+++ b/hardware/PiLcd/pilcd.js
@@ -6,20 +6,26 @@ module.exports = function(RED) {
     var fs = require('fs');
 
     var gpioCommand = __dirname + '/nrlcd';
+    var allOK = true;
 
-    if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
-        //util.log("Info : Ignoring Raspberry Pi specific node.");
-        throw "Info : Ignoring Raspberry Pi specific node.";
+    try {
+        var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
+        if (cpuinfo.indexOf(": BCM") === -1) {
+            RED.log.warn("rpi-lcd : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+            allOK = false;
+        }
+        else if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
+            RED.log.warn("rpi-lcd : "+RED._("node-red:rpi-gpio.errors.libnotfound"));
+            allOK = false;
+        }
+        else if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
+            RED.log.warn("rpi-lcd : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:gpioCommand}));
+            allOK = false;
+        }
     }
-
-    if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
-        util.log("[rpi-lcd] Info : Can't find Pi RPi.GPIO python library.");
-        throw "Warning : Can't find Pi RPi.GPIO python library.";
-    }
-
-    if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
-        util.log("[rpi-lcd] Error : " + gpioCommand + " needs to be executable.");
-        throw "Error : " + gpioCommand + " must to be executable.";
+    catch(err) {
+        RED.log.warn("rpi-lcd : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+        allOK = false;
     }
 
     function PiLcdNode(n) {
@@ -33,54 +39,61 @@ module.exports = function(RED) {
             else { node.warn("Command not running"); }
         }
 
-        if (node.pins !== undefined) {
-            node.child = spawn(gpioCommand, [node.pins]);
-            node.running = true;
-            if (RED.settings.verbose) { node.log("pin: " + node.pins + " :"); }
-            node.on("input", inputlistener);
+        if (allOK === true) {
+            if (node.pins !== undefined) {
+                node.child = spawn(gpioCommand, [node.pins]);
+                node.running = true;
+                if (RED.settings.verbose) { node.log("pin: " + node.pins + " :"); }
+                node.on("input", inputlistener);
 
-            node.child.stdout.on('data', function(data) {
-                if (RED.settings.verbose) { node.log("out: " + data + " :"); }
+                node.child.stdout.on('data', function(data) {
+                    if (RED.settings.verbose) { node.log("out: " + data + " :"); }
+                });
+
+                node.child.stderr.on('data', function(data) {
+                    if (RED.settings.verbose) { node.log("err: " + data + " :"); }
+                });
+
+                node.child.on('close', function(code) {
+                    if (RED.settings.verbose) { node.log("ret: " + code + " :"); }
+                    node.child = null;
+                    node.running = false;
+                });
+
+                node.child.on('error', function(err) {
+                    if (err.errno === "ENOENT") { node.warn('Command not found'); }
+                    else if (err.errno === "EACCES") { node.warn('Command not executable'); }
+                    else { node.log('error: ' + err); }
+                });
+
+            }
+            else {
+                node.error("Invalid GPIO pins: " + node.pin);
+            }
+
+            var wfi = function(done) {
+                if (!node.running) {
+                    if (RED.settings.verbose) { node.log("end"); }
+                    done();
+                    return;
+                }
+                setTimeout(function() { wfi(done); }, 333);
+            }
+
+            node.on("close", function(done) {
+                if (node.child != null) {
+                    node.child.stdin.write("c:lose" + node.pin);
+                    node.child.kill('SIGKILL');
+                }
+                wfi(done);
             });
-
-            node.child.stderr.on('data', function(data) {
-                if (RED.settings.verbose) { node.log("err: " + data + " :"); }
-            });
-
-            node.child.on('close', function(code) {
-                if (RED.settings.verbose) { node.log("ret: " + code + " :"); }
-                node.child = null;
-                node.running = false;
-            });
-
-            node.child.on('error', function(err) {
-                if (err.errno === "ENOENT") { node.warn('Command not found'); }
-                else if (err.errno === "EACCES") { node.warn('Command not executable'); }
-                else { node.log('error: ' + err); }
-            });
-
         }
         else {
-            node.error("Invalid GPIO pins: " + node.pin);
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
+            node.on("input", function(msg){
+                node.status({fill:"grey",shape:"dot",text:RED._("node-red:rpi-gpio.status.na",{value:msg.payload.toString()})});
+            });
         }
-
-        var wfi = function(done) {
-            if (!node.running) {
-                if (RED.settings.verbose) { node.log("end"); }
-                done();
-                return;
-            }
-            setTimeout(function() { wfi(done); }, 333);
-        }
-
-        node.on("close", function(done) {
-            if (node.child != null) {
-                node.child.stdin.write("c:lose" + node.pin);
-                node.child.kill('SIGKILL');
-            }
-            wfi(done);
-        });
-
     }
     RED.nodes.registerType("rpi-lcd", PiLcdNode);
 }
diff --git a/hardware/PiLiter/39-rpi-piliter.js b/hardware/PiLiter/39-rpi-piliter.js
index ac6b1ec9..5c069824 100644
--- a/hardware/PiLiter/39-rpi-piliter.js
+++ b/hardware/PiLiter/39-rpi-piliter.js
@@ -6,20 +6,26 @@ module.exports = function(RED) {
     var fs = require('fs');
 
     var gpioCommand = __dirname+'/nrgpio.py';
+    var allOK = true;
 
-    if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
-        //util.log("Info : Ignoring Raspberry Pi specific node.");
-        throw "Info : Ignoring Raspberry Pi specific node.";
+    try {
+        var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
+        if (cpuinfo.indexOf(": BCM") === -1) {
+            RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+            allOK = false;
+        }
+        else if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
+            RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.libnotfound"));
+            allOK = false;
+        }
+        else if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
+            RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:gpioCommand}));
+            allOK = false;
+        }
     }
-
-    if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
-        util.log("[rpi-gpio] Info : Can't find Pi RPi.GPIO python library.");
-        throw "Warning : Can't find Pi RPi.GPIO python library.";
-    }
-
-    if ( !(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
-        util.log("[rpi-gpio] Error : "+gpioCommand+" needs to be executable.");
-        throw "Error : " + gpioCommand + " must to be executable.";
+    catch(err) {
+        RED.log.warn("rpi-liter : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+        allOK = false;
     }
 
     function PiLiter(n) {
@@ -28,75 +34,80 @@ module.exports = function(RED) {
         this.dir = (n.dir ? 1 : 0) || 0;
         var node = this;
 
-        if (this.pinv === "bar") {
-            node.child = spawn(gpioCommand, ["byte",node.dir]);
-            node.on("input", function(msg) {
-                var out = Number(msg.payload);
-                if ((out >= 1) && (out <= 8)) { out = Math.pow(2, out) - 1; }
-                else { out = 0; }
-                if (node.child !== null) { node.child.stdin.write(out+"\n"); }
-                else { node.warn("Command not running"); }
-            });
-        }
-        else if (this.pinv === "meter") {
-            node.child = spawn(gpioCommand, ["byte",node.dir]);
-            node.on("input", function(msg) {
-                var out = Number(msg.payload);
-                if ((out >= 1) && (out <= 8)) { out = Math.pow(2, (out-1)); }
-                else { out = 0; }
-                if (node.child !== null) { node.child.stdin.write(out+"\n"); }
-                else { node.warn("Command not running"); }
-            });
-        }
-        else if (this.pinv === "all") {
-            node.child = spawn(gpioCommand, ["byte",node.dir]);
-            node.on("input", function(msg) {
-                var out = msg.payload;
-                if ((out === 1)|(out === true)|(out === "1")|(out === "on")) {
-                    out = 255;
-                }
-                else { out = 0; }
-                if (node.child !== null) { node.child.stdin.write(out+"\n"); }
-                else { node.warn("Command not running"); }
-            });
-        }
-        else if (this.pinv === "pin") {
-            node.child = spawn(gpioCommand, ["byte",node.dir]);
-            var byte = 0;
-            node.on("input", function(msg) {
-                if (typeof msg.payload === "object") {
-                    var out = Number(msg.payload.led);
-                    var l = Number(msg.payload.state);
-                    if ((out >= 1) && (out <= 8)) {
-                        out = (Math.pow(2, (out-1)));
-                        if (l === 0) { byte = (byte & (~out) & 255); }
-                        else { byte = (byte | out) & 255; }
-                        if (node.child !== null) { node.child.stdin.write(byte+"\n"); }
-                        else { node.warn("Command not running"); }
+        if (allOK === true) {
+            if (this.pinv === "bar") {
+                node.child = spawn(gpioCommand, ["byte",node.dir]);
+                node.on("input", function(msg) {
+                    var out = Number(msg.payload);
+                    if ((out >= 1) && (out <= 8)) { out = Math.pow(2, out) - 1; }
+                    else { out = 0; }
+                    if (node.child !== null) { node.child.stdin.write(out+"\n"); }
+                    else { node.warn("Command not running"); }
+                });
+            }
+            else if (this.pinv === "meter") {
+                node.child = spawn(gpioCommand, ["byte",node.dir]);
+                node.on("input", function(msg) {
+                    var out = Number(msg.payload);
+                    if ((out >= 1) && (out <= 8)) { out = Math.pow(2, (out-1)); }
+                    else { out = 0; }
+                    if (node.child !== null) { node.child.stdin.write(out+"\n"); }
+                    else { node.warn("Command not running"); }
+                });
+            }
+            else if (this.pinv === "all") {
+                node.child = spawn(gpioCommand, ["byte",node.dir]);
+                node.on("input", function(msg) {
+                    var out = msg.payload;
+                    if ((out === 1)|(out === true)|(out === "1")|(out === "on")) {
+                        out = 255;
+                    }
+                    else { out = 0; }
+                    if (node.child !== null) { node.child.stdin.write(out+"\n"); }
+                    else { node.warn("Command not running"); }
+                });
+            }
+            else if (this.pinv === "pin") {
+                node.child = spawn(gpioCommand, ["byte",node.dir]);
+                var byte = 0;
+                node.on("input", function(msg) {
+                    if (typeof msg.payload === "object") {
+                        var out = Number(msg.payload.led);
+                        var l = Number(msg.payload.state);
+                        if ((out >= 1) && (out <= 8)) {
+                            out = (Math.pow(2, (out-1)));
+                            if (l === 0) { byte = (byte & (~out) & 255); }
+                            else { byte = (byte | out) & 255; }
+                            if (node.child !== null) { node.child.stdin.write(byte+"\n"); }
+                            else { node.warn("Command not running"); }
+                        }
+                        else { node.warn("Not a valid object - see Info panel."); }
                     }
                     else { node.warn("Not a valid object - see Info panel."); }
+                });
+            }
+            else {
+                node.child = spawn(gpioCommand, ["byte",node.dir]);
+                node.on("input", function(msg) {
+                    var out = Number(msg.payload);
+                    if ((out >= 0) && (out <= 255)) {
+                        if (node.child !== null) { node.child.stdin.write(out+"\n"); }
+                        else { node.warn("Command not running"); }
+                    }
+                    else { node.warn("Invalid input - not between 0 and 255"); }
+                });
+            }
+
+            node.on("close", function() {
+                if (node.child != null) {
+                    node.child.kill('SIGKILL');
                 }
-                else { node.warn("Not a valid object - see Info panel."); }
+                if (RED.settings.verbose) { node.log("end"); }
             });
         }
         else {
-            node.child = spawn(gpioCommand, ["byte",node.dir]);
-            node.on("input", function(msg) {
-                var out = Number(msg.payload);
-                if ((out >= 0) && (out <= 255)) {
-                    if (node.child !== null) { node.child.stdin.write(out+"\n"); }
-                    else { node.warn("Command not running"); }
-                }
-                else { node.warn("Invalid input - not between 0 and 255"); }
-            });
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
         }
-
-        node.on("close", function() {
-            if (node.child != null) {
-                node.child.kill('SIGKILL');
-            }
-            if (RED.settings.verbose) { node.log("end"); }
-        });
     }
     RED.nodes.registerType("rpi-liter",PiLiter);
 }
diff --git a/hardware/PiLiter/package.json b/hardware/PiLiter/package.json
index ea7a7143..2b9f059e 100644
--- a/hardware/PiLiter/package.json
+++ b/hardware/PiLiter/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-piliter",
-    "version"       : "0.0.11",
+    "version"       : "0.0.12",
     "description"   : "A Node-RED node to drive a Raspberry Pi Pi-LITEr 8 LED board.",
     "dependencies"  : {
     },
diff --git a/hardware/PiSrf/nrsrf.py b/hardware/PiSrf/nrsrf.py
index d21e9f56..efb5a1f2 100755
--- a/hardware/PiSrf/nrsrf.py
+++ b/hardware/PiSrf/nrsrf.py
@@ -31,7 +31,7 @@ def Measure():
     # else:
         # print("Echo start detected")
     start = time.time()
-          
+
     GPIO.wait_for_edge(ECHO, GPIO.BOTH,  timeout=400)
     if channel is None:
         print("Ultrasonic sensor timed out (post-echo).")
@@ -40,7 +40,7 @@ def Measure():
     # else:
         # print("Echo finish detected")
     stop = time.time()
-   
+
     elapsed = stop-start
     distance = (elapsed * 34300)/2 # Using speed of sound at 20C (68F)
 
diff --git a/hardware/PiSrf/package.json b/hardware/PiSrf/package.json
index 0efbd041..5b865604 100644
--- a/hardware/PiSrf/package.json
+++ b/hardware/PiSrf/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-pisrf",
-    "version"       : "0.1.0",
+    "version"       : "0.1.1",
     "description"   : "A Node-RED node for a Raspberry Pi to use a SRF04 or SRF05 range finder",
     "dependencies"  : {
     },
diff --git a/hardware/PiSrf/pisrf.js b/hardware/PiSrf/pisrf.js
index 10a8a9d9..6fa23377 100644
--- a/hardware/PiSrf/pisrf.js
+++ b/hardware/PiSrf/pisrf.js
@@ -6,20 +6,26 @@ module.exports = function(RED) {
     var fs = require('fs');
 
     var gpioCommand = __dirname + '/nrsrf.py';
+    var allOK = true;
 
-    if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
-        //util.log("Info : Ignoring Raspberry Pi specific node.");
-        throw "Info : Ignoring Raspberry Pi specific node.";
+    try {
+        var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
+        if (cpuinfo.indexOf(": BCM") === -1) {
+            RED.log.warn("rpi-srf : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+            allOK = false;
+        }
+        else if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
+            RED.log.warn("rpi-srf : "+RED._("node-red:rpi-gpio.errors.libnotfound"));
+            allOK = false;
+        }
+        else if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
+            RED.log.warn("rpi-srf : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:gpioCommand}));
+            allOK = false;
+        }
     }
-
-    if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
-        util.log("[rpi-srf] Info : Can't find Pi RPi.GPIO python library.");
-        throw "Warning : Can't find Pi RPi.GPIO python library.";
-    }
-
-    if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
-        util.log("[rpi-srf] Error : " + gpioCommand + " needs to be executable.");
-        throw "Error : " + gpioCommand + " must to be executable.";
+    catch(err) {
+        RED.log.warn("rpi-srf : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+        allOK = false;
     }
 
     function PiSrfNode(n) {
@@ -29,56 +35,60 @@ module.exports = function(RED) {
         this.pins += ","+(n.pulse || 0.5);
         var node = this;
 
-        if (node.pins !== undefined) {
-            node.child = spawn(gpioCommand, [node.pins]);
-            node.running = true;
-            if (RED.settings.verbose) { node.log("parameters: " + node.pins + " :"); }
+        if (allOK === true) {
+            if (node.pins !== undefined) {
+                node.child = spawn(gpioCommand, [node.pins]);
+                node.running = true;
+                if (RED.settings.verbose) { node.log("parameters: " + node.pins + " :"); }
 
-            node.child.stdout.on('data', function(data) {
-                if (RED.settings.verbose) { node.log("out: " + data + " :"); }
-                data = data.toString().trim();
-                if (data.length > 0) {
-                    node.send({topic:node.topic, payload:data});
+                node.child.stdout.on('data', function(data) {
+                    if (RED.settings.verbose) { node.log("out: " + data + " :"); }
+                    data = data.toString().trim();
+                    if (data.length > 0) {
+                        node.send({topic:node.topic, payload:data});
+                    }
+                });
+
+                node.child.stderr.on('data', function(data) {
+                    if (RED.settings.verbose) { node.log("err: " + data + " :"); }
+                });
+
+                node.child.on('close', function(code) {
+                    if (RED.settings.verbose) { node.log("ret: " + code + " :"); }
+                    node.child = null;
+                    node.running = false;
+                });
+
+                node.child.on('error', function(err) {
+                    if (err.errno === "ENOENT") { node.warn('Command not found'); }
+                    else if (err.errno === "EACCES") { node.warn('Command not executable'); }
+                    else { node.log('error: ' + err); }
+                });
+
+            }
+            else {
+                node.error("Invalid Parameters: " + node.pins);
+            }
+
+            var wfi = function(done) {
+                if (!node.running) {
+                    if (RED.settings.verbose) { node.log("end"); }
+                    done();
+                    return;
                 }
-            });
+                setTimeout(function() { wfi(done); }, 333);
+            }
 
-            node.child.stderr.on('data', function(data) {
-                if (RED.settings.verbose) { node.log("err: " + data + " :"); }
+            node.on("close", function(done) {
+                if (node.child != null) {
+                    node.child.kill('SIGKILL');
+                }
+                wfi(done);
             });
-
-            node.child.on('close', function(code) {
-                if (RED.settings.verbose) { node.log("ret: " + code + " :"); }
-                node.child = null;
-                node.running = false;
-            });
-
-            node.child.on('error', function(err) {
-                if (err.errno === "ENOENT") { node.warn('Command not found'); }
-                else if (err.errno === "EACCES") { node.warn('Command not executable'); }
-                else { node.log('error: ' + err); }
-            });
-
         }
         else {
-            node.error("Invalid Parameters: " + node.pins);
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
         }
-
-        var wfi = function(done) {
-            if (!node.running) {
-                if (RED.settings.verbose) { node.log("end"); }
-                done();
-                return;
-            }
-            setTimeout(function() { wfi(done); }, 333);
-        }
-
-        node.on("close", function(done) {
-            if (node.child != null) {
-                node.child.kill('SIGKILL');
-            }
-            wfi(done);
-        });
-
     }
     RED.nodes.registerType("rpi-srf", PiSrfNode);
 }
diff --git a/hardware/neopixel/neopixel.js b/hardware/neopixel/neopixel.js
index 25207c29..bb973b85 100755
--- a/hardware/neopixel/neopixel.js
+++ b/hardware/neopixel/neopixel.js
@@ -6,23 +6,26 @@ module.exports = function(RED) {
     var fs = require('fs');
     var colors = require('./colours.js');
     var piCommand = __dirname+'/neopix';
+    var allOK = true;
 
     try {
         var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
-        if (cpuinfo.indexOf(": BCM") === -1) { throw "Info : "+RED._("rpi-gpio.errors.ignorenode"); }
+        if (cpuinfo.indexOf(": BCM") === -1) {
+            RED.log.warn("rpi-neopixels : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+            allOK = false;
+        }
+        else if (execSync('python -c "import neopixel"').toString() !== "") {
+            RED.log.warn("rpi-neopixels : Can't find neopixel python library");
+            allOK = false;
+        }
+        else if (!(1 & parseInt ((fs.statSync(piCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
+            RED.log.warn("rpi-neopixels : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:piCommand}));
+            allOK = false;
+        }
     }
     catch(err) {
-        throw "Info : "+RED._("rpi-gpio.errors.ignorenode");
-    }
-
-    if (execSync('python -c "import neopixel"').toString() !== "") {
-        RED.log.warn("Can't find neopixel python library");
-        throw "Warning : Can't find neopixel python library";
-    }
-
-    if ( !(1 & parseInt ((fs.statSync(piCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
-        RED.log.error(piCommand + " command is not executable");
-        throw "Error : "+RED._("rpi-gpio.errors.mustbeexecutable");
+        RED.log.warn("rpi-neopixels : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+        allOK = false;
     }
 
     // the magic to make python print stuff immediately
@@ -110,57 +113,70 @@ module.exports = function(RED) {
             }
         }
 
+<<<<<<< Updated upstream
         node.child = spawn(piCommand, [node.pixels, node.wipe, node.mode, node.brightness, node.gamma]);
         node.status({fill:"green",shape:"dot",text:"ok"});
+||||||| merged common ancestors
+        node.child = spawn(piCommand, [node.pixels, node.wipe, node.mode]);
+        node.status({fill:"green",shape:"dot",text:"ok"});
+=======
+        if (allOK === true) {
+            node.child = spawn(piCommand, [node.pixels, node.wipe, node.mode]);
+            node.status({fill:"green",shape:"dot",text:"ok"});
+>>>>>>> Stashed changes
 
-        node.on("input", inputlistener);
+            node.on("input", inputlistener);
 
-        node.child.stdout.on('data', function (data) {
-            if (RED.settings.verbose) { node.log("out: "+data+" :"); }
-        });
+            node.child.stdout.on('data', function (data) {
+                if (RED.settings.verbose) { node.log("out: "+data+" :"); }
+            });
 
-        node.child.stderr.on('data', function (data) {
-            if (RED.settings.verbose) { node.log("err: "+data+" :"); }
-        });
+            node.child.stderr.on('data', function (data) {
+                if (RED.settings.verbose) { node.log("err: "+data+" :"); }
+            });
 
-        node.child.on('close', function () {
-            node.child = null;
-            if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
-            if (node.done) {
+            node.child.on('close', function () {
+                node.child = null;
+                if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
+                if (node.done) {
+                    node.status({fill:"grey",shape:"ring",text:"closed"});
+                    node.done();
+                }
+                else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
+            });
+
+            node.child.on('error', function (err) {
+                if (err.errno === "ENOENT") { node.error(RED._("rpi-gpio.errors.commandnotfound")); }
+                else if (err.errno === "EACCES") { node.error(RED._("rpi-gpio.errors.commandnotexecutable")); }
+                else { node.error(RED._("rpi-gpio.errors.error")+': ' + err.errno); }
+            });
+
+            node.on("close", function(done) {
                 node.status({fill:"grey",shape:"ring",text:"closed"});
-                node.done();
-            }
-            else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
-        });
+                if (node.child != null) {
+                    node.done = done;
+                    node.child.kill('SIGKILL');
+                }
+                else { done(); }
+            });
 
-        node.child.on('error', function (err) {
-            if (err.errno === "ENOENT") { node.error(RED._("rpi-gpio.errors.commandnotfound")); }
-            else if (err.errno === "EACCES") { node.error(RED._("rpi-gpio.errors.commandnotexecutable")); }
-            else { node.error(RED._("rpi-gpio.errors.error")+': ' + err.errno); }
-        });
-
-        node.on("close", function(done) {
-            node.status({fill:"grey",shape:"ring",text:"closed"});
-            if (node.child != null) {
-                node.done = done;
-                node.child.kill('SIGKILL');
+            if (node.bgnd) {
+                if (node.bgnd.split(',').length === 1) {
+                    node.bgnd = colors.getRGB(node.bgnd,node.rgb);
+                }
+                if (node.mode.indexOf("shift") === -1) {
+                    node.child.stdin.write(node.bgnd+"\n");
+                }
             }
-            else { done(); }
-        });
 
-        if (node.bgnd) {
-            if (node.bgnd.split(',').length === 1) {
-                node.bgnd = colors.getRGB(node.bgnd,node.rgb);
-            }
-            if (node.mode.indexOf("shift") === -1) {
-                node.child.stdin.write(node.bgnd+"\n");
+            if (node.fgnd) {
+                if (node.fgnd.split(',').length === 1) {
+                    node.fgnd = colors.getRGB(node.fgnd,node.rgb);
+                }
             }
         }
-
-        if (node.fgnd) {
-            if (node.fgnd.split(',').length === 1) {
-                node.fgnd = colors.getRGB(node.fgnd,node.rgb);
-            }
+        else {
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
         }
     }
     RED.nodes.registerType("rpi-neopixels",PiNeopixelNode);
diff --git a/hardware/neopixel/package.json b/hardware/neopixel/package.json
index ae9a8475..c61d4d92 100755
--- a/hardware/neopixel/package.json
+++ b/hardware/neopixel/package.json
@@ -1,11 +1,12 @@
 {
-    "name": "node-red-node-pi-neopixel",
-    "version": "0.0.17",
-    "description": "A Node-RED node to output to a neopixel (ws2812) string of LEDS from a Raspberry Pi.",
-    "dependencies": {},
-    "repository": {
-        "type": "git",
-        "url": "https://github.com/node-red/node-red-nodes/tree/master/hardware/neopixel"
+    "name"          : "node-red-node-pi-neopixel",
+    "version"       : "0.0.17",
+    "description"   : "A Node-RED node to output to a neopixel (ws2812) string of LEDS from a Raspberry Pi.",
+    "dependencies"  : {
+    },
+    "repository" : {
+        "type":"git",
+        "url":"https://github.com/node-red/node-red-nodes/tree/master/hardware/neopixel"
     },
     "license": "Apache-2.0",
     "keywords": [
diff --git a/hardware/pigpiod/package.json b/hardware/pigpiod/package.json
index 8ea76b8b..cb797337 100644
--- a/hardware/pigpiod/package.json
+++ b/hardware/pigpiod/package.json
@@ -1,6 +1,6 @@
 {
   "name": "node-red-node-pi-gpiod",
-  "version": "0.0.9",
+  "version": "0.0.10",
   "description": "A node-red node for PiGPIOd",
   "dependencies"  : {
       "js-pigpio": "*"
diff --git a/hardware/pigpiod/pi-gpiod.js b/hardware/pigpiod/pi-gpiod.js
index ca16dd1f..143629da 100644
--- a/hardware/pigpiod/pi-gpiod.js
+++ b/hardware/pigpiod/pi-gpiod.js
@@ -99,14 +99,15 @@ module.exports = function(RED) {
         var PiGPIO;
 
         function inputlistener(msg) {
-            if (!inerror) {
-                if (msg.payload === "true") { msg.payload = true; }
-                if (msg.payload === "false") { msg.payload = false; }
-                var out = Number(msg.payload);
-                var limit = 1;
-                if (node.out !== "out") { limit = 100; }
-                if ((out >= 0) && (out <= limit)) {
-                    if (RED.settings.verbose) { node.log("out: "+msg.payload); }
+            if (msg.payload === "true") { msg.payload = true; }
+            if (msg.payload === "false") { msg.payload = false; }
+            var out = Number(msg.payload);
+            var limit = 1;
+            if (node.out !== "out") { limit = 100; }
+            var pre = "";
+            if ((out >= 0) && (out <= limit)) {
+                if (RED.settings.verbose) { node.log("out: "+msg.payload); }
+                if (!inerror) {
                     if (node.out === "out") {
                         PiGPIO.write(node.pin, msg.payload);
                     }
@@ -119,8 +120,11 @@ module.exports = function(RED) {
                     }
                     node.status({fill:"green",shape:"dot",text:msg.payload.toString()});
                 }
-                else { node.warn(RED._("pi-gpiod:errors.invalidinput")+": "+out); }
+                else {
+                    node.status({fill:"grey",shape:"ring",text:"N/C: " + msg.payload.toString()});
+                }
             }
+            else { node.warn(RED._("pi-gpiod:errors.invalidinput")+": "+out); }
         }
 
         if (node.pin !== undefined) {
diff --git a/hardware/unicorn/package.json b/hardware/unicorn/package.json
index 31b8bffb..25503178 100644
--- a/hardware/unicorn/package.json
+++ b/hardware/unicorn/package.json
@@ -1,6 +1,6 @@
 {
     "name"          : "node-red-node-pi-unicorn-hat",
-    "version"       : "0.0.16",
+    "version"       : "0.0.17",
     "description"   : "A Node-RED node to output to a Raspberry Pi Unicorn HAT from Pimorini.",
     "dependencies"  : {
         "pngjs": "2.2.*"
diff --git a/hardware/unicorn/unicorn.js b/hardware/unicorn/unicorn.js
index c1f11ac8..629d2275 100644
--- a/hardware/unicorn/unicorn.js
+++ b/hardware/unicorn/unicorn.js
@@ -7,20 +7,26 @@ module.exports = function(RED) {
     var execSync = require('child_process').execSync;
 
     var hatCommand = __dirname+'/unihat';
+        var allOK = true;
 
-    if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
-        //RED.log.info(RED._("rpi-gpio.errors.ignorenode"));
-        throw "Info : "+RED._("rpi-gpio.errors.ignorenode");
+    try {
+        var cpuinfo = fs.readFileSync("/proc/cpuinfo").toString();
+        if (cpuinfo.indexOf(": BCM") === -1) {
+            RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+            allOK = false;
+        }
+        else if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
+            RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.libnotfound"));
+            allOK = false;
+        }
+        else if (!(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]))) {
+            RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.needtobeexecutable",{command:hatCommand}));
+            allOK = false;
+        }
     }
-
-    if (execSync('python -c "import neopixel"').toString() !== "") {
-        RED.log.warn("Can't find neopixel python library");
-        throw "Warning : Can't find neopixel python library";
-    }
-
-    if ( !(1 & parseInt ((fs.statSync(hatCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
-        RED.log.error(hatCommand + " command is not executable");
-        throw "Error : "+RED._("rpi-gpio.errors.mustbeexecutable");
+    catch(err) {
+        RED.log.warn("rpi-unicorn : "+RED._("node-red:rpi-gpio.errors.ignorenode"));
+        allOK = false;
     }
 
     // the magic to make python print stuff immediately
@@ -208,52 +214,57 @@ module.exports = function(RED) {
             else { node.warn("Input not a string"); }
         }
 
-        node.child = spawn(hatCommand, [node.bright]);
-        node.status({fill:"green",shape:"dot",text:"ok"});
+        if (allOK === true) {
+            node.child = spawn(hatCommand, [node.bright]);
+            node.status({fill:"green",shape:"dot",text:"ok"});
 
-        node.on("input", inputlistener);
+            node.on("input", inputlistener);
 
-        node.child.stdout.on('data', function (data) {
-            if (RED.settings.verbose) { node.log("out: "+data+" :"); }
-        });
+            node.child.stdout.on('data', function (data) {
+                if (RED.settings.verbose) { node.log("out: "+data+" :"); }
+            });
 
-        node.child.stderr.on('data', function (data) {
-            if (RED.settings.verbose) { node.log("err: "+data+" :"); }
-        });
+            node.child.stderr.on('data', function (data) {
+                if (RED.settings.verbose) { node.log("err: "+data+" :"); }
+            });
 
-        node.child.on('close', function () {
-            node.child = null;
-            if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
-            if (node.done) {
+            node.child.on('close', function () {
+                node.child = null;
+                if (RED.settings.verbose) { node.log(RED._("rpi-gpio.status.closed")); }
+                if (node.done) {
+                    node.status({fill:"grey",shape:"ring",text:"closed"});
+                    node.done();
+                }
+                else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
+            });
+
+            node.child.on('error', function (err) {
+                if (err.errno === "ENOENT") { node.error(RED._("rpi-gpio.errors.commandnotfound")); }
+                else if (err.errno === "EACCES") { node.error(RED._("rpi-gpio.errors.commandnotexecutable")); }
+                else { node.error(RED._("rpi-gpio.errors.error")+': ' + err.errno); }
+            });
+
+            node.on("close", function(done) {
                 node.status({fill:"grey",shape:"ring",text:"closed"});
-                node.done();
+                if (node.tout) { clearTimeout(node.tout); }
+                if (node.child != null) {
+                    node.done = done;
+                    node.child.kill('SIGKILL');
+                }
+                else { done(); }
+            });
+
+            var nowready = function() {
+                node.tout = setTimeout( function() {
+                    if (ready) { inputlistener({payload:"0"}); }
+                    else { nowready(); }
+                }, 100);
             }
-            else { node.status({fill:"red",shape:"ring",text:"stopped"}); }
-        });
-
-        node.child.on('error', function (err) {
-            if (err.errno === "ENOENT") { node.error(RED._("rpi-gpio.errors.commandnotfound")); }
-            else if (err.errno === "EACCES") { node.error(RED._("rpi-gpio.errors.commandnotexecutable")); }
-            else { node.error(RED._("rpi-gpio.errors.error")+': ' + err.errno); }
-        });
-
-        node.on("close", function(done) {
-            node.status({fill:"grey",shape:"ring",text:"closed"});
-            if (node.tout) { clearTimeout(node.tout); }
-            if (node.child != null) {
-                node.done = done;
-                node.child.kill('SIGKILL');
-            }
-            else { done(); }
-        });
-
-        var nowready = function() {
-            node.tout = setTimeout( function() {
-                if (ready) { inputlistener({payload:"0"}); }
-                else { nowready(); }
-            }, 100);
+            nowready();
+        }
+        else {
+            node.status({fill:"grey",shape:"dot",text:"node-red:rpi-gpio.status.not-available"});
         }
-        nowready();
     }
     RED.nodes.registerType("rpi-unicorn",UnicornHatNode);
 }