Measuring ESP32 Power Consumption

Yuvaraj1867
Posts: 19
Joined: Wed Mar 06, 2019 4:39 am
Location: Bangalore

Measuring ESP32 Power Consumption

Postby Yuvaraj1867 » Wed Jul 24, 2019 10:38 am

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.
Attachments
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KEWEISI Voltage Current Meter
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username
Posts: 108
Joined: Thu May 03, 2018 1:18 pm

Re: Measuring ESP32 Power Consumption

Postby username » Wed Jul 24, 2019 12:05 pm

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

WiFive
Posts: 2787
Joined: Tue Dec 01, 2015 7:35 am

Re: Measuring ESP32 Power Consumption

Postby WiFive » 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

Yuvaraj1867
Posts: 19
Joined: Wed Mar 06, 2019 4:39 am
Location: Bangalore

Re: Measuring ESP32 Power Consumption

Postby Yuvaraj1867 » Thu Jul 25, 2019 4:27 am

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.

Yuvaraj1867
Posts: 19
Joined: Wed Mar 06, 2019 4:39 am
Location: Bangalore

Re: Measuring ESP32 Power Consumption

Postby Yuvaraj1867 » Mon Jul 29, 2019 10:58 am

Any updates?

WiFive
Posts: 2787
Joined: Tue Dec 01, 2015 7:35 am

Re: Measuring ESP32 Power Consumption

Postby WiFive » Mon Jul 29, 2019 6:41 pm

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

Nikonov_94
Posts: 5
Joined: Fri Jul 26, 2019 6:20 pm

Re: Measuring ESP32 Power Consumption

Postby Nikonov_94 » Tue Jul 30, 2019 7:14 am

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.

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