4-20mA sensor to Dragonfly
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John Greene.
John GreeneDoes MTQ-LAT3-B01 have the ability to accept a 4-20 ma signal from a sensor?
Tim GunnHi John
What type a sensor is this?
The ST micro GPIO can source upto 25ma output but is not good at sinking current on the inputs.
http://www.st.com/en/microcontrollers/stm32f411re.html
John GreeneHey Tim,
We are looking to hook a couple of air pressure sensors to a cell signaling device. After a little more research this afternoon, I guess it would be a 4-20ma (current loop) sensor board that we would need to mount the Dragonfly (or whatever AT&T signalling device we use) on. We thought Libelium’s Waspmote might be a good option (using something other than a Dragonfly) but it only operates up to 120F.