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Miceuz / i2c-moisture-sensor

I2C based soil moisture sensor
Apache License 2.0
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low power usage #12

Closed parallelpilgrim closed 7 years ago

parallelpilgrim commented 7 years ago

Is there any way you are aware of to get power usage while sleeping under 1.1mA?

I've been looking at some of the sleep code for hints but was wondering if anything like this was planned.

Ideally under 1mA would be ideal for sleep mode consumption. Additionally I only care about moisture readings.

thanks!

Miceuz commented 7 years ago

Hi,

Yes, there is a sleep instruction you can issue via I2C. Then thermistor circuit dominates the power consumption - 20k @ 5V makes it 250uA, 20k @ 3.3V - 165uA. There is no way around this currently, but I will fix it in the next revision of the sensor. My experiments show that I can get as low as 2uA in deep sleep mode. But anyway, It will be well under 1mA in the current revision.