ESP8266 Community Forum

Hi,

I am working on ESP-WROOM-02 Wifi Modules and want to check Power consumed by ESP while booting it or operations it in different modes.

Also, how to test power consumption in different sleep modes like modem sleep, light sleep and deep sleep modes?

Please let me know hardware connections as well as software configurations to check power consumption for ESP-WROOM-02 Wifi Modules.

Regards,
Ritesh Prajapati

The best way to do this if you haven't got access to accurate power usage hardware is just to connect the power through a low ohm resistor (an accurate one) and connect an oscilloscope across that to see what the current is. You'll get a nice waveform showing you the power consumption as the radio fires up, etc.
Hope this helps,
Ben

Hi,

Means power up module with 0 ohm register connected with VDD 3.3 Power Pin of module and measure signal through CRO to get actual current consumption by this module. correct?

Regards,
Ritesh Prajapati

Almost - you'll need to use something like a 1 ohm resistor to VDD and measure the voltage drop across it to work out the current consumption