I was thinking it would be interesting to make a LoRaWan timber
moisture meter. The theory is to apply some volts (10v?) in order to measure the resistance between two
pin probes in the timer, the moister the wood the lower resisance.
As I understand it the resistance for this type of application is measured in megohms, are there any module out there that can measure resistance as an analog value, GPIO? Or is there some other way of more acuratly measuring the resistance ohms?
I also see that many of the hand held timber moisture meter send out 10v into the wood, is a buck converter the way to go since I was planning on using some sort of 3.3v battery driven device? Will amps on the pins factor?
Was planning to put the device in deep sleep waiking it a couple of times a day to get a reading and send it through TTN.