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Reply To: Logging Mayfly with Decagon SDI-12 Sensor

Home Forums Mayfly Data Logger Logging Mayfly with Decagon SDI-12 Sensor Reply To: Logging Mayfly with Decagon SDI-12 Sensor

#14491
Shannon Hicks
Participant

Check your wiring, the Meter group CTD sensor has a red wire for the data (signal) wire, white is positive voltage, and black is ground. It’s kind of backwards from most common DC sensor wires where red is usually the voltage supply wire. I’ve confirmed with the folks at Meter that the sensor works just fine at 3.3v.