Copied iap4e.bin again, and updating works fine again. I think it was corrupted or something.

Thanks.

Flashed 1.19beta9 with Sam-Ba and flashed the DuetWiFiServer1.19beta9. They work fine.

But I still can not update the main firmware using M997 S0 or using the web interface. The firmware is uploaded but updating the firmware has no effect.

Just flashed the firmwares from https://github.com/dc42/RepRapFirmware/tree/dev/Release/Duet-WiFi/Edge

I only flashed the main firmware, even though it says successfully flashed, no changes happen. It does not flash the main firmware, version number does not change.

Then, I flash both WiFiServer and Firmware, WiFi Server updated and firmware version changes and the "Received opcode 0000013c length 0 data" issue happens, and main firmware version did not change even though it says successfully flashed.

Then, I flash only the WiFiServer, WiFiServer version changed, then the "Received opcode 0000013c length 0 data" issue happens.

I implement something on the source code and need to flash the latest firmware but I could not do. I upload and flash the main firmware but the new one I uploaded is not flashed.

Any recommendation?

Thanks.