RPi GPIO are 3.3V logic levels.
In case your relay board uses 5V logic you will have to use an I2C voltage level translater.
Applying 5V to the GPIO can/will kill them!
Sorry, I did not check your 'boot metthod link'. Use an official OS image, boot from uSD.
I2C-1 is the interface of interrest, I2C-20/21 are DDC1/DDC2 - related to HDMI.
To enable i2c-1 you will have to enable i2c_arm via config.txt.
Which I/O board do you have?
In case your relay board uses 5V logic you will have to use an I2C voltage level translater.
Applying 5V to the GPIO can/will kill them!
Sorry, I did not check your 'boot metthod link'. Use an official OS image, boot from uSD.
I2C-1 is the interface of interrest, I2C-20/21 are DDC1/DDC2 - related to HDMI.
To enable i2c-1 you will have to enable i2c_arm via config.txt.
Which I/O board do you have?
Statistics: Posted by aBUGSworstnightmare — Thu Jun 27, 2024 4:55 am
