SPX-15074 SparkX Humidity Sensor Breakout SHTC3
Price: 17.5$ (sensor only 2.5$)
Site: Sensirion: https://sensirion.com/products/catalog/SHTC3
Datasheet: Sensirion_Humidity_Sensors_SHTC3_Datasheet.pdf
Local copy of datasheet: Datasheet_SHTC3.pdf
Library: https://github.com/sparkfun/SparkFun_SHTC3_Arduino_Library
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