I used the espaper kit for 3 days or so with my own server and was very happy with the battery lifetime (from 4.13 to 4.08 in 3 days).
Unfortunately the device stopped working all of a sudden and just displayed the "Device not found" screen. I attached the serial monitor and only got garbage ("{l #l⸮rs$ cl⸮{⸮⸮⸮c⸮ # ⸮⸮r⸮ d`⸮⸮ol⸮{⸮⸮NoNb$b>"). A lot and really fast. Kinda like the output you get when resetting a normal esp8266, just a LOT more and it doesn't stop. So I tried to program again and this did work like a charm. So I guess the bootloader still works. After programming I got the following error over and over:
epc1=0x40229904, epc2=0x00000000, epc3=0x00000000, excvaddr=0x00000000, depc=0x00000000
Fatal exception (0):
After turning it off and on again I got the same garbage again.
So I tried a different programmer I had lying around with the same result: flashing worked, but exceptions and then garbage.
I now tried the following small test program but it behaves exactly the same and gives me lots of garbage. It works fine on another esp8266 I have here. So I don't think it is my environment. Especially since it happened all of a sudden and I can still flash, but get garbage only.
Any idea what else I could test?
void setup() {
Serial.begin(115200);
Serial.print("Setup");
}
void loop() {
Serial.print(".");
delay(1000);
}