recently I bought some ESP32-POE-ISO-EA-IND boards for use as a proxy from olimex website, but I am unable to flash those using
https://esphome.github.io/bluetooth-proxies/
or
https://web.esphome.io/
this is the error as shown in the web.esphome.io log
```
rst:0x10 (RTCWDT_RTC_RESET),boot:0x1b (SPI_FAST_FLASH_BOOT)
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
invalid header: 0xffffffff
ets Jul 29 2019 12:21:46
```
There seems to be some bug in ESPHome configs, refer to this thread:
https://www.olimex.com/forum/index.php?topic=9255.msg38402#msg38402
what are other methods to flash beside esphome for proxy?
Out of 6 boards, only one was flashed successfully. what kind of issue this might be?
Consider that each ESP32 boards that Olimex manufactures is programmed under Linux via esptool and tested here after manufacturing. Every single board gets programmed via esptool. If 5 out of 6 boards fail to program via another tools I'd suggest the issue is with the tool or the drivers, not the boards.