ESP32 devkit lipo not booting

[webgiorgio]

Hi,
new board (never connected to anything else) connected to the computer is giving me this message, repeated at about 1 Hz.

Code Select Expand

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun  8 2016 00:22:57
It would not accept a program upload (arduino IDE, used many times on ESP32-devkit-C).

The second board of the same order, same model, gives me garbage in the serial monitor, with about the same frequency.

Ideas?

[LubOlimex]

The message you see on the serial is normal when you haven't downloaded anything to the board and the flash is empty. If I get a board from the shop I get the same output - it is normal. I've replied similarly here:

https://www.olimex.com/forum/index.php?topic=6118.0

[LubOlimex]

The programming fail is a problem.

Is the yellow LED on when you attach the board the computer? Is the board properly recognized and given a serial port?

What operating system are you using?

Do you have Olimex ESP32-DevKit-Lipo selected in Tools -> Board ?

Did you try with lower baud rates? For example, try with 115200.

Edit: I tested an ESP32-DevKit-Lipo from the shop today to see if there is some major issue with all products, but it worked fine with Arduino IDE even with the highest baud of 921600.

[webgiorgio]

Hi,
I was able to flash the board lowering the speed to 115200 bps.
Yes, Arduino ide is set for Olimex board.

With the ESP32 I used so far (from a reel or the devkit C) I have never encountered this problem. Normally I've a boot message but no continuous reboot.

tnx

[LubOlimex]

Try installing the drivers from the product page, sometimes older drivers doesn't allow reaching the full speed of CH340T (the USB-serial converter in Olimex ESP32 boards).