I have 3 pieces of MOD-WIFI-ESP8266-DEV.
2 of them are working fine and updated to 1.6.2 via AT+CIUPDATE.
the last one refuses to boot or to start in UART mode.
the only messages i got from the terminal at 74880 bauds is :
ets Jan 8 2013,rst cause:1, boot mode:(3,7) when booting normal (flash mode)
ets Jan 8 2013,rst cause:1, boot mode:(1,5) when booting in UART mode (button pressed ) when powering
any idea/method to put a firmware ( i want to use AT commands).
Thank you for any help
Erase the SPI flash and re-write. I've seen such reports, for example here: https://github.com/esp8266/Arduino/issues/1328
Try with the older firmware that I've described here: https://www.olimex.com/Products/IoT/_resources/ESP8266EX-how-to-update-firmware.pdf
I had ti use newer version of ESP Tools to erase SPI flash...but not sure if i erased
the problem seems that when booting the ESP is in 74880 bps and the tool doesn't propose the speed (so i'm selecting 115200)
When trying to download anything, i get
CONNECT BAUD: 115200
R]: ESP8266 Chip flash download error esp_write_flash.
And the detected infos are :
00h : N/A
Hmm maybe this would be helpful read: https://github.com/espressif/esptool/issues/380 - same error reports.