ESP32-C3 (esp32-c3-devkitc02 module) power consumption optimisation for device to run on coin cell CR2032

Elegant Embedded
Posts: 1
Joined: Thu Apr 20, 2023 12:27 pm

ESP32-C3 (esp32-c3-devkitc02 module) power consumption optimisation for device to run on coin cell CR2032

Postby Elegant Embedded » Tue Apr 25, 2023 7:42 am

Hello Experts ,
I am using the device esp32-c3-devkitc02 and the device radio current consumption is pretty high for the SOC (ESP32- C3) to run with Coin cell CR2032 ( 3V,220mAh , @max pulse current 10mA).
Is there an option to configure the device TX dBm level from +21 to -24bBm ?
there was a significant current change as you can see form the images upon changing the TX power Level.
i have used 1ohm 3W shunt resistor for current measurement at the low side.

Peak Current of 300mA for +21 dBm
21dBm.jpg
21dBm.jpg (110.13 KiB) Viewed 1082 times
Peak Current of 200mA for +18 dBm (although the probes were connected correctly there was a -ve voltage displayed)
18dBm.jpg
18dBm.jpg (113.68 KiB) Viewed 1082 times
1) Are there any way to make it work for with 10mA as max current consumption ( competitive ICs are offering 3-5mA RX current at 0dBm )
2) there was no option to configure the RX dBm level in the configurator
configurator.jpg
configurator.jpg (686.33 KiB) Viewed 1082 times

MicroController
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Joined: Mon Oct 17, 2022 7:38 pm
Location: Europe, Germany

Re: ESP32-C3 (esp32-c3-devkitc02 module) power consumption optimisation for device to run on coin cell CR2032

Postby MicroController » Wed Apr 26, 2023 7:38 pm

Are there any way to make it work for with 10mA as max current consumption
Unlikely, given that, according to the datasheet and confirmed by my own measurements, the C3 at idle (not sleeping), without any RF enabled, draws about 17mA @ 80MHz. - You could certainly add a low-pass filter in the supply line to limit the maximum current during brief periods of activity.
there was no option to configure the RX dBm level in the configurator
What would that kind of configuration be supposed to do? Defining the power of a received signal? Reduce the power consumption by lowering the sensitivity (gain) of the receiver?

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