ESP32 Forum

Hi Guys,

I was planned to measure ESP32 Power Consumption in various modes of operation.

I found a device in market named KEWEISI Voltage Current Meter. (Attached)
Product Link : https://www.banggood.in/USB-Detector-Cu ... eviewsWrap

Anybody used this product for measuring Current Consumption of ESP32. If yes, How was the accuracy?

Otherwise, We have any other proper way to measure Current Consumption of ESP32.

I cannot comment on that specific model, as there are many of them.
You can do a few things.

#1) Get yourself a meter. Take your USB cable and cut the jacket off somewhere in the middle. Cut the RED wire and put your meter in current mode in series with the 2 red wires. Then you can measure current accurately, providing you did not buy a cheap $12 meter.

#2) Use a precision 1% resistor and attach it to the output to see if the current it shows is indeed correct.
I.E. if you put a 100 Ohm resistor on the output you should get 50ma. I=E/R = I=5v/100 Ohm.

#3) Get a dedicated power supply like one of these to check the current.
https://www.amazon.com/gp/product/B07DQ ... UTF8&psc=1

Think about whether you want to measure the overall 5v current which would include the ldo Iq, usb-uart chip, etc or if you want to measure just the chip/module current

WiFive wrote: ↑

Wed Jul 24, 2019 11:43 pm

Think about whether you want to measure the overall 5v current which would include the ldo Iq, usb-uart chip, etc or if you want to measure just the chip/module current

Hi

Thanks for the reply.

Yes, i want to measure overall circuit current consumption(EX:ESP32-Dev-KitC current consumption) as well as just module current consumption. Please suggest some method for doing this. At the same time that method has to give accurate results.

In description of ESP32-MeshKit-Sense Espressif mentioned

The board is mainly used to detect the current consumption of ESP32 modules in a normal operation state or in sleep mode, when connected to different peripherals.

I already purchased the kit. Do you have any idea how to measure power consumption by using ESP32-MeshKit-Sense.

Any updates?

I think you just have to insert a meter across the jumper that feeds esp32 3.3v power

Yeah, I guess that would work as well! But I'm still glad I've heard about the tool the OP described, it'd be useful for more than the ESP32.