From 3eef45a78311e8267f6b0f39c21e26a16f131319 Mon Sep 17 00:00:00 2001 From: Dave Conway-Jones Date: Tue, 6 May 2014 13:15:36 -0700 Subject: [PATCH] Destroyed ReadMe BeagleBoneBlack (markdown) --- ReadMe-BeagleBoneBlack.md | 91 --------------------------------------- 1 file changed, 91 deletions(-) delete mode 100644 ReadMe-BeagleBoneBlack.md diff --git a/ReadMe-BeagleBoneBlack.md b/ReadMe-BeagleBoneBlack.md deleted file mode 100644 index 0d22f5d..0000000 --- a/ReadMe-BeagleBoneBlack.md +++ /dev/null @@ -1,91 +0,0 @@ -#Beaglebone Black -As the BeagleBoneBlack already has node.js baked into it's default Angstrom OS then some of these tips are optional... - -##Updating node.js and bonescript to latest version (optional) - -ssh into the BBB as root, and at the prompt - - opkg update - opkg install screen nodejs bonescript - -This also installs screen which we use as the preferred way to be able to keep an eye on the Node-RED console. - -##Installation - -As per other distributions. - -Edit the node-red/settings.js file to contain - - //functionGlobalContext: { } - functionGlobalContext: { bonescript:require('bonescript') } - -This makes the entire bonescript library available to any functions you write. They are accessible by declaring in a function (for example) : - - var b = context.global.bonescript; - -Then manually start Node-RED, - - cd node-red - node red.js - -then assuming you haven't changed the beaglebone's hostname use a connected browser to browse http://beaglebone.local:1880 - -##Blink - -To run a "blink" flow that uses the USR3 and USR2 LEDs import the following flow, by cutting the line below into your clipboard. - - [{"id":"b1fce44.9ce3c18","type":"inject","name":"on","topic":"","payload":"1","repeat":"","once":false,"x":127.16666412353516,"y":109.16666412353516,"wires":[["b2a66e5e.6da6f"]]},{"id":"591aef4d.b55f38","type":"inject","name":"off","topic":"","payload":"0","repeat":"","once":false,"x":127.16666412353516,"y":149.16666412353516,"wires":[["b2a66e5e.6da6f"]]},{"id":"36f2a960.164f76","type":"inject","name":"tick","topic":"","payload":"","repeat":"1","once":false,"x":127.16666412353516,"y":49.166664123535156,"wires":[["7ee460bc.df48e"]]},{"id":"55249ec9.21e61","type":"debug","name":"","active":true,"x":567.1666641235352,"y":89.16666412353516,"wires":[]},{"id":"7ee460bc.df48e","type":"function","name":"Toggle USR3 LED on input","func":"\nvar pin = \"USR3\"\nvar b = context.global.bonescript;\ncontext.state = context.state || b.LOW;\n\nb.pinMode(pin, b.OUTPUT);\n\n(context.state == b.LOW) ? context.state = b.HIGH : context.state = b.LOW;\nb.digitalWrite(pin, context.state);\n\nreturn msg;","outputs":1,"x":347.16666412353516,"y":69.16666412353516,"wires":[["55249ec9.21e61"]]},{"id":"b2a66e5e.6da6f","type":"function","name":"Set USR2 LED on input","func":"\nvar pin = \"USR2\";\nvar b = context.global.bonescript;\n\nb.pinMode(pin, b.OUTPUT);\n\nvar level = (msg.payload === \"1\")?1:0;\nb.digitalWrite(pin, level);\n\nreturn msg;","outputs":1,"x":347.16666412353516,"y":129.16666412353516,"wires":[["55249ec9.21e61"]]}] - -Then in the Node-RED browser - Use Options (top right) - Import From - Clipboard, or the shortcut Ctrl-I, and paste in the text, Ctrl-V. - -Hit Deploy - and the flow should start running. USR3 LED should start toggling on and off once a second. USR2 LED can be set on or off depending on which button is clicked. - -##Making Node-RED autostart on boot (optional) - -As Angstrom uses the Upstart way of doing things we need to create a couple of files. - -One in **/lib/systemd/system** -called **node-red.service** -containing - - [Unit] - Description=Start Node-RED - - [Service] - Environment=HOME=/home/root - WorkingDirectory=/home/root - ExecStart=/home/root/go.sh - SyslogIdentifier=Node-RED - RemainAfterExit=yes - - [Install] - WantedBy=multi-user.target - -and one in **/home/root** -called **go.sh** -containing - - #!/bin/bash - - ntpdate pool.ntp.org - export NODE_PATH=/usr/lib/node_modules - cd /home/root/node-red/ - /usr/bin/screen -dmS red /usr/bin/node red.js - -then run the following commands - - systemctl enable node-red.service - systemctl start node-red.service - -You should then be able to type - - screen -ls -and see red listed. -To get to the terminal type - - screen -r red -type Ctrl-A-D to detach and leave it running - -Notice that go.sh also tries to set the clock correctly using ntpdate. You shouldn't have to do this but I find the BBB does sometimes take an age to sync up - so forcing it helps. - -Other useful hints -http://www.gigamegablog.com/2012/01/29/beaglebone-linux-101-configuring-angstrom-linux/