What is the behavior of the CHG LED on the ESP32 Thing Plus? I am no schematic reading whiz, but in looking at it and the data sheet for the MCP73831, it appears there should be different behavior while charging vs when it is fully charged. It seems like it is always on for me. Is this expected?
Thanks!
Is there a battery attached?
Yes, there is a battery attached, and the LED never goes off. I thought that at some point it would change state based on the battery’s charge level.
If you have [this product, it looks like it should charge at 500mAh. For a 2000mAh battery, that would end up taking roughly 5 hours of charge time. (Charge rate tapers off at around 90% charge.)
It could be that your USB source is providing less than 500mA or it could be a bad board. Try plugging the board into a USB cell phone charger over night and see if the CHG LED goes out after that. If not, it could be a bad battery or a bad board. (or both)](SparkFun Thing Plus - ESP32-S2 WROOM - WRL-17743 - SparkFun Electronics)
Got it. I will try that. Thanks for the suggestion!
So the LED should go off once the battery is charged? Is there any way that the ESP32 chip is drawing enough current that the battery never completely charges?
Current draw would slow charging but nothing on the board should be drawing so much current that you can never fully charge the battery.
The light turned off after charging it with a phone charger. Great suggestion. Thanks!
I’m happy I could help!