OTA upgrade with AT firmware 1.6.2 (ESP8266, 32Mb-c1) is failing

[c-w-e]

Hi dev team,

during Investigation of issue #179 I also tried to flash my ESP8266, 32Mb module with AT binari firmware 1.6.2 in 32Mb-c1 mode using esptool.py using the memory addresses as documented.

Firmware installation worked as expected an the module is processing AT commands (e.g. setting up wifi connection) without any issues.

Trying to do an OTA firmware upgrade using AT+CIUPDATE runs through all 4 stages documented in AT command instructions PDF without an error but results in an not working ESP8266 module with no reaction on serial communication.

As there is no output which firmware gets downloaded, I‘m asuming it is version 1.7.0 as this is currently (2018-10-19) latest version which is availible.
Next assumption would be that this is running into the same root cause as in issue #179.

Any idea from someone in espressif team?

[xcguang]

@c-w-e ,
Maybe the firmware you downloaded is 16M-c1, AT v1.7.0 do check the flash map. You can recompile it by 32Mb-c1 mode.