I am creating some device that communicate via I2C, I can connect up to 8 device total but will only have 4 (uno is one of those)
I will be using PCF8574 at each device and the devices are about 30 cm away from uno
the question is do they have to be in a series Ie device 1 goes to device 2 then device 2 to device 3 then device 3 to device 4
or can i connect all 3 devices to the same pins directly at the uno