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@redplc/node-red-rpi-gpio

v2.0.7

Published

Node-RED nodes for Raspberry Pi gpio using with redPlc nodes.

Downloads

289

Vulnerabilities

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Links

Maintainers

redplcredplc

Keywords

node-rediotredplcplccontrolraspberry pirpidigitalgpioinputoutputpwmcounter

Readme

@redplc/node-red-rpi-gpio

platform platform platform

Node-RED nodes for Raspberry Pi GPIO using with redPlc nodes.

Nodes

  • rpi-gpio-in: Reads GPIO inputs and store in boolean array.
  • rpi-gpio-out: Sets GPIO outputs from boolean array.
  • rpi-gpio-pwm: Sets GPIO pwm duty cycles from number array.
  • rpi-gpio-cnt: Counts GPIO inputs pulse and store in number array.

Usage

  • Install redPlc nodes.
  • Use redPlc s-inject node for trigger update.
  • Connect to first output on s-inject node.
  • Daisy chain nodes in series.
  • For logical operations use redPlc nodes.
  • Data is exchanged with global context variable arrays.
  • Array index is equal gpio number for easy handling.
  • Select different gpio pins for input, output and pwm.
  • For open inputs select pull down/up resistors.
  • This node works on Raspberry Pi with 32bit or 64bit OS.
  • Check with raspi-config for alternate functions on GPIO.

Array Index Mapping

|Index|Funct.|Pin|Pin|Funct.|Index| |:--|:---- |:-:|:-:|:-----|:--| ||3V3|1|2|5V|| |2|GPIO02|3|4|5V|| |3|GPIO03|5|6|GND|| |4|GPIO04|7|8|GPIO14|14| ||GND|9|10|GPIO15|15| |17|GPIO17|11|12|GPIO18|18| |27|GPIO27|13|14|GND|| |22|GPIO22|15|16|GPIO23|23| ||3V3|17|18|GPIO24|24| |10|GPIO10|19|20|GND|| |9|GPIO09|21|22|GPIO25|25| |11|GPIO11|23|24|GPIO08|8| ||GND|25|26|GPIO07|7| |||27|28||| |5|GPIO05|29|30|GND|| |6|GPIO06|31|32|GPIO12|12| |13|GPIO13|33|34|GND|| |19|GPIO19|35|36|GPIO16|15| |26|GPIO26|37|38|GPIO20|20| ||GND|39|40|GPIO21|21|

Examples

Example 1

This example is a self holding circuit used for push buttons. Led turns on, if switch GPIO21 is closed. Led turns off, if switch GPIO20 is closed.

  • Connect LED with resistor (~220 Ohms) to GPIO26 and ground pin.
  • Connect switches to GPIO20 and GPIO21 and ground pin.
  • Select GPIO20 and GPIO21 as pullup inputs.
  • Select GPIO26 as output.

Example 2

This example sets led brightness to 25%, 50% or 100% with switches.

  • Connect LED with resistor (~220 Ohms) to GPIO26 and ground pin.
  • Connect switches to GPIO16, GPIO20 and GPIO21 and ground pin.
  • Select GPIO16, GPIO20 and GPIO21 as pullup inputs.
  • Select GPIO26 as pwm.