I am going to try Pico devices. I need to connect four devices to the one SDA/SCL pins on the Nano board. Using cable to connect boards in series and hardwire from terminals on last device to Nano, are pullup resistors required still? Are they built into the boards?
If needed is it correct that they need to be between 2K and 10K? The lower the value, the better for high speed responses?
Thanks in advance.