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Colleagues,
I am using pi zero and plan to add a rain sensor. Noticed that this goes to GPIO14 and some messages mention about adding a pull up r and also a series one. Question is about pull up, since pi zero do have pull up sw capabilities. So was wondering if not just enable pull up and forget it about adding the R.
Cheers,martin
You can use the internal pullup available on RPi. This is what OpenSprinkler firmware does:
https://github.com/OpenSprinkler/OpenSprinkler-Firmware/blob/master/gpio.cpp#L292
it calls the system’s gpio command to enable internal pullup. This requires wiringPi to be installed.
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