WIZ750SR-110 does not save configuration

Question

I bricked my WIZ750SR-110 by uploading a bad bin file. I was able to reload WIZ750SR-1xxv133_incl_Boot.bin using ISP I can connect with wizconfig-V1.5.0.exe, but MAC address is FF:FF:FF:FF:FF:FF, and when I change settings and Apply Settings, it reverts to factory defaults on restart. I have also tried command line serial commands with the same result. Any idea why it won’t retain settings? Thanks

TimKeck · Answer

I was able to recover from this by using W7500ISP: select ISP->Dump->Data Dump from top menu bar Edit resulting data_flash.bin with a Hex editor, insert MAC address staring at offset 0 Under Step 2 - Erase: Check Erase Data0 & Erase Data1then click Start Step 2 Under Step 5 – Select Binary FIle: select Binary File as edited data_flash.bin by using Browse button Check Write DataFlash Click Start Step 5 This was Version 1.0.0.1 of W7500 ISP Tool, file “W7500_ISP_20180731.exe” I hope this helps someone else.