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Solved: Jeenode Zero, GPIO-input, pull-up resistance needed?

Added by Rolf 4 months ago

Hi,
To read out the state of switches, I configure GPIOs with IMODE-HIGH (\ input, pull up) (Forth-library), with an external pull up resistance of 10 k in serial with the switch. But, is the resistance needed, or is it already provided internally in this mode?
Does anyone know?
Thanks,
Rolf

One could guess that the pull-up resistance is included, because there are different configuration modes for pull-up and pull-down. A test confirmed this assumption, it works, just a switch between GPIO and GND.