Arduino-Serial-Communication-Example-Sketch-for-NodeRed

Node-Red Arduino-PC sample sketch

~Written by MakerKath
~Updated Nov 11, 2017

This script allow basic interactions with Node-Red,
to prepare for uses of this script, the user need to install Node-Red and certain Nodes.

Node-Red install:

1. Install Nodejs https://nodejs.org/en/
2. Follow installation instructions
3. Install Node-Red using Nodejs install functions using commandline/terminal. Remove "Sudo" if on windows.
https://nodered.org/docs/getting-started/installation
4. Run Node-Red once before installing nodes. Type "node-red" in commandline/terminal
5. Ctrl + C and terminate batch jobs.

Nodes Installation:

1. Install Dashboard, follow instructions:
https://flows.nodered.org/node/node-red-dashboard
2. Install SerialPort, follow instructions:
https://flows.nodered.org/node/node-red-node-serialport

Running Node-Red:

1. Open commandline/terminal
2. type "node-red"
3. head over to the http address given
4. Experiement and code away.

Stopping Node-Red:

1. Return to running commandline/terminal where Node-Red is running.
2. Ctrl + C and Terminalte batch job Y.

Node-Red Instruction for this Sketch:

1. Use Dashboard button node to make a switch
Configure switch to send a number string.
2. Use Serial Output, Set connection to the COM port the Arduino is connected to.
3. Connect switch to Serial Output
4. Use Serial Input, Set connection to COM port Arduino is connected to.
5. Add a Debug Output and/or notification output.
6. Connect Serial Input to Debug and/or Notification output.

Optional:

Connect pin #8 as positive terminal to 220 ohm resistor in series
with a LED (Make sure it's correctly oriented).
Ground (GND) opposing side of circuit to make a closed loop circuit.

WARNING: Do not Short the circuit.

Note: You can change the pins if you want. Button set to payload 0 will send
Serial 48 and so on due to bits differences. You can see the effect on payload 16.