Hi all, I am trying to use an SI7012 I2C sensor in a low power pro mini based sensor node. I am running into troubles trying to power the SI 7021 from a pro mini's digital pin (to save power while sleeping). If I power the SI7021 from Vcc, the max current I measure is 1.09 mA; the datasheet state…

Powering an SI7021 sensor from a digital pin

johnwasser April 3, 2018, 3:43pm 4

Is the sensor on a breakout board? Does the board contain anything other than a bypass capacitor and two pull-up resistors for the I2C bus?

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