lols

下载google tts

颜色可以自己选，我喜欢黑背景，深黄色

ouch hahaha copy paste wrongly

check this on github ESPAsync_WiFiManager, it contains a web file manager which you can upload gif to esp32 onboard flash, probably you can code to write the file to sd...

On original firmware the bms ic will stop providing power to the mcu after few seconds, only way is to make your programmer output 3.3v to keep the mcu powered