node-red/nodes/hardware/36-rpi-gpio.html

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<script type="text/x-red" data-template-name="rpi-gpio in">
    <div class="form-row">
        <label for="node-input-pin"><i class="icon-asterisk"></i> GPIO Pin</label>
        <select type="text" id="node-input-pin" style="width: 150px;">
            <option value="-">select pin</option>
            <option value="7">7</option>
            <option value="11">11</option>
            <option value="12">12</option>
            <option value="13">13</option>
            <option value="15">15</option>
            <option value="16">16</option>
            <option value="18">18</option>
            <option value="22">22</option>
         </select>
    </div>
    <div class="form-row">
        <label for="node-input-intype"><i class=" icon-resize-full"></i> Resistor?</label>
        <select type="text" id="node-input-intype" style="width: 150px;">
        <option value="tri">none</option>
        <option value="up">pullup</option>
        <option value="down">pulldown</option>
        <!--<option value="tri">tristate</option>-->
        </select>
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="icon-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div class="form-tips">Tip: Only Digital I/O is supported - input must be 0 or 1.</div>
</script>

<script type="text/x-red" data-help-name="rpi-gpio in">
	<p>Raspberry Pi input node. Generates a <b>msg.payload</b> with either a 0 or 1 depending on the state of the input pin. Requires the gpio command to work.</p>
	<p>You may also enable the input pullup resitor or the pulldown resistor.</p>
	<p>The <b>msg.topic</b> is set to <i>pi/{the pin number}</i></p>
	<p><b>Note:</b> we are using the actual physical pin numbers on connector P1 as they are easier to locate.</p>
	<p><b>Note:</b> This node currently polls the pin every 250mS. This is not ideal as it loads the cpu, and will be rewritten shortly to try to use interrupts.</p>

</script>

<script type="text/javascript">
    RED.nodes.registerType('rpi-gpio in',{
        category: 'advanced-input',
        color:"#c6dbef",
        defaults: {
            name: { value:"" },
            intype: { value: "in" },
            pin: { value:"",required:true,validate:RED.validators.number() },
        },
        inputs:0,
        outputs:1,
        icon: "rpi.png",
        label: function() {
            return this.name||"Pin: "+this.pin ;
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        }
    });
</script>


<script type="text/x-red" data-template-name="rpi-gpio out">
    <div class="form-row">
        <label for="node-input-pin"><i class="icon-asterisk"></i> GPIO Pin</label>
        <select type="text" id="node-input-pin" style="width: 150px;">
            <option value="-">select pin</option>
            <option value="7">7</option>
            <option value="11">11</option>
            <option value="12">12</option>
            <option value="13">13</option>
            <option value="15">15</option>
            <option value="16">16</option>
            <option value="18">18</option>
            <option value="22">22</option>
         </select>
    </div>
    <div class="form-row">
        <label for="node-input-name"><i class="icon-tag"></i> Name</label>
        <input type="text" id="node-input-name" placeholder="Name">
    </div>
    <div class="form-tips">Tip: Only Digital I/O is supported - input must be 0 or 1.</div>
</script>

<script type="text/x-red" data-help-name="rpi-gpio out">
	<p>Raspberry Pi output node. Expects a <b>msg.payload</b> with either a 0 or 1 (or true or false). Requires the gpio command to work.</p>
	<p>Will set the selected physical pin high or low depending on the value passed in.</p>
	<p><b>Note:</b> we are using the actual physical pin numbers on connector P1 as they are easier to locate.</p>
</script>

<script type="text/javascript">
    RED.nodes.registerType('rpi-gpio out',{
        category: 'advanced-output',
        color:"#c6dbef",
        defaults: {
            name: { value:"" },
            pin: { value:"",required:true,validate:RED.validators.number() },
        },
        inputs:1,
        outputs:0,
        icon: "rpi.png",
        align: "right",
        label: function() {
            return this.name||"Pin: "+this.pin;
        },
        labelStyle: function() {
            return this.name?"node_label_italic":"";
        }
    });
</script>