Mystery envelope revealed

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Mystery envelope revealed: It’s a digital H2S (hydrogen sulfide) sensor from SPEC Sensors. Works at 3.3V and talks via UART interface. Temperature and humidity compensated.
 
For now I’ve been able to make it work with an Arduino Due and get some readings. Still a lot of work to do to parse the incoming data string, and to write some nice functions to configure the sensor. Full blog post in a few days…
H2S sensor output

H2S sensor output

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