CrowPanel 1.28" with ESP32-C3
I'm trying to use a QI standard wireless charging system with a CrowPanel 1.28" running an ESP32-C3. I've got a small LiPo battery connected to it. I'm planning on using this as a pocket watch (for my son), and want to be able to recharge the battery wirelessly.
I have the output of the QI receiver module (5v 0.6a output) connected to a USB-C plug connected to the USB socket of the CrowPanel board. It will run the CrowPanel very nicely without the battery connected, but once I hook up the battery it causes the transmitter (I have a generic one from Amazon) to just flash slowly.
I'm going to test it when the battery is low enough to not run the board, and see what I can do there, but I'm really hoping someone out there has a suggestion to get this working properly!
Comments
HI bbroerman,
Sorry, we require some time to investigate and analyze the questions you raised. Once our analysis is complete, I will get back to you as soon as possible. We appreciate your patience.
We apologize for the inconvenience.
Thanks!
Warm regards,
HI bbroerman,
This could be due to unstable battery voltage.
Warm regards,
the battery was about half discharged. Would it be better with the battery more discharged or less discharged? I can run the entire panel when no battery is connected, but it doesn't seem to want to provide a charge through the charging circuit built into the crowpanel.
I tried 2 different LiPo batteries. both behave the same way
HI bbroerman,
Sorry, we need some time to investigate and analyze the questions you raised. Once our analysis is complete, I will get back to you as soon as possible. We appreciate your patience.
We apologize for the inconvenience.
Thanks!
Warm regards,
HI bbroerman,
The problem is most likely caused by a power conflict due to insufficient power supply: the Qi wireless module only provides 5V/0.6A (approximately 3W, actually lower), while the ESP32-C3 and screen itself have a transient current requirement of 300-600mA. Adding the battery charging current, the total power consumption directly exceeds the Qi module's capacity, causing a drop in input voltage. This triggers the Qi transmitter's protection mechanism, resulting in flickering. Simultaneously, the onboard charging circuit malfunctions due to voltage instability.
Recommended: Replace with a more powerful Qi module.
At least: 5V/1A (minimum), better: 5V/2A
Thanks!
Warm regards,