A Node-RED node for Raspberry Pi to write to HD44780 style LCD panels.
npm install node-red-node-pilcdA Node-RED node for a Raspberry Pi
to write to a GPIO connected HD44780 style LCD panels.
Either use the Node-RED Menu - Manage Palette option to install, or run the following
command in your Node-RED user directory - typically ~/.node-red
npm install node-red-node-pilcd
Raspberry Pi output to HD44780 style LCD module - typically 1, 2, or 4 lines.
It must be configured with a comma separated list of pins that are wired to the LCD panel.
Pins MUST be a comma separated list of the 6 GPIO connector
pin numbers that are connected to the RS, E, D4, D5, D6 and D7 pins of the LCD. e.g.
26,24,22,18,16,12
Send the node a msg.payload with a string in it.
Strings for the 2nd line of the display must start 2: - the third start 3: - and the fourth 4: - For example
2:I'm on line two
4:and this is on line 4
1:or indeed line 1
The 1: is not necessary for line one but is there if you build lines using a template,
To clear the display send the string clr:
It is up to you to manage string lengths to suit the display.
Requires the RPi.GPIO python library version 0.5.8 (or better) in order to work.
Note: we are using the actual physical pin numbers on connector P1 as they are easier to locate.