ROC-RK3328 GPIO Node Red Raspbain

[jimmy232]

I’ve recently tried accessing the GPIO pins from Node Red while using the rpi.GPIO node but have failed. Is there a driver I need to install in order to map IO across to the operating System or something?

[librecomputer]

rpi.GPIO is not a supported library due to poor coding and bad design. We recommend using libgpiod which is the de-facto Linux way of controlling all aspects of GPIOs.

To get the proper chip and line numbers for use with libgpiod, we made a handy tool:

Libre Computer Wiring Tool

To install via apt: sudo apt update sudo apt install libretech-gpio libretech-dtoverlay libretech-gpio To get a list of headers for your board: lgpio headers To get a list of the header pins for a header: lgpio header HEADER For getting the information for a pin number on the main GPIO header of the board: lgpio info PIN# For getting the information for a pin number on a specific header of the board: lgpio info HEADER PIN# For getting the libgpiod chip and line number for a pin on th…

You can get the gpio chip and line numbers using our lgpio command.
lgpio info PIN# gpiod

You can get and set the gpio using gpiod commands.
gpioget
gpioset

There are other bindings like C/C++/Python for libgpiod. You can also find the GPIO maps here:

GPIO Pinout Header Maps and Wiring Tool for Libre Computer Boards

Below are links to spreadsheets with the GPIO and its pinmuxes. These are derived from the board schematics. ALL-H3-CC AML-S805X-AC AML-S905X-CC AML-S905X-CC-V2 identical to AML-S905X-CC AML-S905D-PC AML-S905D3-CC AML-A311D-CC ROC-RK3328-CC ROC-RK3328-CC-V2 identical to ROC-RK3328-CC ROC-RK3399-PC ROC-RK3399-PC-V1.2 Also see Libre Computer Wiring Tool and Libre Computer Pinmux Compatibility Matrix.