Hello! This is the first time I come to this forum, hope this is not a very silly question: I am using Industruino Proto D21G for a PID temperature control. I had seen in the documentation that the digital outputs level in Proto was 5V, but my program, already tested in an Arduino Uno board, wasn't working properly. Among other things, I measured the digital output level and found that it was 3.3 V. I searched and saw that to get the 5V level you need to use pull up resistors, but I found no more details. Does anyone know how you can get the pull ups activated? Is it by software, by means of a setup function in the program? Or do I have to phisically add the pull up resistors in my board? In which case, what is the correct value?
Thanks in advance,
Hi, you will have to add an external pull-up resistor between the pin and 5V. You can start with a 10Kohm resistor and see if that works with the device you have connected to the output pin. see also https://github.com/Industruino/documentation/blob/master/proto.md#proto-gpio
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