0.4W is a lot. WiFi-connected ESP32 draws about 140 mA. esp8266 will be similar....

mordae on April 27, 2022 | parent | context | favorite | on: No, you can’t save £30 per year by switching off y...

0.4W is a lot.

WiFi-connected ESP32 draws about 140 mA. esp8266 will be similar. They are both 3.3V devices.

3.3 * 0.140 = 0.46

Your light bulb's esp8266 (or a similar chip, zigbee is 2.4 GHz as well) is fully powered.

With a switching power supply and proper light sleep you should see about 1/10 of that.

API reference: https://docs.espressif.com/projects/esp8266-rtos-sdk/en/late...

Sleep impact: https://github.com/chaeplin/esp8266_and_arduino/tree/master/...

eropple on April 27, 2022 [–]

Huh--I was certain it could be better, though I didn't realize it was that high! On the other hand, my electricity is hydro and it costs like $0.009 per kilowatt-hour.