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Thank you Andrew

my Sensor 4pins input 5V, GND, DO: digital output and AO: analog output

andrew wrote:What does the DO do on the sensor? Does it output data or is it a simple 5V ON/OFF output?

Hello, i new member
Please advise how to connect the transmitter if i use for humid sensor (VCC 5V, GND and DO )

I try to minimizes cost by calibrate it first when the sensor ON then reciver dial my fog pump

thank you