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History

Dave Conway-Jones dd250a77bc core to Pi node-red-nodes info updates to be more consistent style		2016-02-12 13:14:12 +00:00
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locales/en-US	Add i18n content for moved core nodes	2015-06-16 10:36:19 +01:00
35-arduino.html	core to Pi node-red-nodes info updates	2016-02-12 13:14:12 +00:00
35-arduino.js	Tidy Arduino - make it use integers.	2016-01-31 23:27:10 +00:00
LICENSE	Move Arduino node from core to external	2015-06-06 18:13:53 +01:00
package.json	core to Pi node-red-nodes info updates	2016-02-12 13:14:12 +00:00
README.md	Tidy Arduino - make it use integers.	2016-01-31 23:27:10 +00:00

README.md

node-red-node-arduino

A Node-RED node to talk to an Arduino running standard firmata 2.2 or better.

Install

Run the following command in the root directory of your Node-RED install, usually this is ~/.node-red

    npm install node-red-node-arduino

Usage

The Firmata firmware must be loaded into the Arduino.

See the main documentation for details and examples of how to use this node.

Input Node

Connects to local Arduino and monitors the selected pin for changes.

You can select either Digital or Analogue input type. Outputs the value read as msg.payload and the pin number as msg.topic.

It only outputs on a change of value - fine for digital inputs, but you can get a lot of data from analogue pins which you must then handle.

You can set the sample rate from 20 to 65535 mS.

Output Node

Connects to local Arduino and writes to the selected pin.

You can select

Digital - accepts 0, 1, true, false, on, off
Analogue (PWM) - accepts Integer 0 to 255
Servo - accepts Integer 0 - 180

Expects a numeric value in msg.payload. The pin number is set in the properties panel.

Note - some servos will not travel a full 180 degree range so may only accept 30 - 150 degrees for example. Please use the range node to scale the input appropriately.

Example

Simple flow to blink Pin 13

    [{"id":"d7663aaf.47194","type":"arduino-board","device":""},{"id":"dae8234f.2517e","type":"inject","name":"0.5s tick","topic":"","payload":"","payloadType":"date","repeat":"0.5","crontab":"","once":false,"x":150,"y":100,"z":"359a4b52.ca65b4","wires":[["56a6f8f2.a95908"]]},{"id":"2db61802.d249e8","type":"arduino out","name":"","pin":"13","state":"OUTPUT","arduino":"d7663aaf.47194","x":570.5,"y":100,"z":"359a4b52.ca65b4","wires":[]},{"id":"56a6f8f2.a95908","type":"function","name":"Toggle output on input","func":"\n// If it does exist make it the inverse of what it was or else initialise it to false\n// (context variables persist between calls to the function)\ncontext.level = !context.level || false;\n\n// set the payload to the level and return\nmsg.payload = context.level;\nreturn msg;","outputs":1,"noerr":0,"x":358,"y":100,"z":"359a4b52.ca65b4","wires":[["2db61802.d249e8"]]}]