2022 Jan 20, 10:05 PM
Most IO boards like relay board usually use the active low principle.
This is because IO drivers like most processors, drivers like the pcf8574 etc. use an open collector output which means the driver only has to pull the pin down and is not dependent on the vcc.
In the meantime I tested both configurations, with common vcc and with common gnd. Both work fine now with the minor code change of course.
My own GitLab repo is up to date now, the plugin section on Dan's GitHub not yet. So you could pull the latest version from my repo and do a manual install.
This is because IO drivers like most processors, drivers like the pcf8574 etc. use an open collector output which means the driver only has to pull the pin down and is not dependent on the vcc.
In the meantime I tested both configurations, with common vcc and with common gnd. Both work fine now with the minor code change of course.
My own GitLab repo is up to date now, the plugin section on Dan's GitHub not yet. So you could pull the latest version from my repo and do a manual install.