Powered ESP32 with 18650, LiPo, or button battery

[SeLoRBIS]

Like I say in my first post and in the title : I search the best way to powered a ESP32 with the minimal size.
with 18650, LiPo or button cell battery.

But thanks for your answers.

[mikemoy]

bumped into this today and thought of you. would this work for you? it has enough output current for the ESP32.

https://www.dfrobot.com/product-1712.ht ... 2-19723189

[Pibbotley]

I use one of these for portable esp32 power which works fine
https://www.ebay.com/itm/Raspberry-Pi-W ... e-no-cable

[SeLoRBIS]

bumped into this today and thought of you. would this work for you? it has enough output current for the ESP32.

https://www.dfrobot.com/product-1712.ht ... 2-19723189

Thanks for the link. This regulator looks nice. I keep the link !!

I use one of these for portable esp32 power which works fine
https://www.ebay.com/itm/Raspberry-Pi-W ... e-no-cable

Yes I have order this one on bangood, i wait the arrival

in the meantime, i discover (because i've not fully read the doc) that the VIN pin on the dev board accept (6-20v)
https://docs.zerynth.com/latest/officia ... index.html

because the current flows in the board voltage regulator ...

My new question (i create a new topic for that) how to remove power led for opitimize consumption.

Thanks guys !!

[Pibbotley]

I've occasionaly (accidently) supplied 12v to my dev kits but you can smell the LDO overheating in a matter of seconds. You would have to add heatsinks / forced cooling. To disable the power led flick it or its resistor off with a sharp tool, or cut the trace.

[SeLoRBIS]

Ok,

I have physically remove the led with a solder iron and it works fine.

I've also try to powered my esp32 dev kit (DOIT) with first a 3,7v battery (18650 - 3,7v - 4A) without removed the power led and the battery died after 4-5 days
I try with a 9v battery (the board was heating) after removed the power led and the battery died after 2 days.

I try this two solutions with the same scenario : ESPEasy Firmware with a DS18B20, and 1hour deep sleep, with 15sec awake between each deep sleep.
Connection to a broker MQTT by WiFi and send temperature data during the 15sec awake.

I don't understand which consumes so much energy and how I can reduce this consumption.
- Change firmware (ESP-IDF maybe) ?
- Add a voltage regulator and powered the board with 5v or 3.3v instead of the VIN pin ?
- Use a board with integrated battery port ? (like lolin32 with LiPo or lolin32 with Li Ion battery (18650))
- Increase the deep sleep ?
- Reduce awake time ?

If you have any idea

Thanks