This is a tutorial to fix Autocom/Delphi Firmware update Fail Error when autocom/delphi firmware can not be upgraded using Autocom/Delphi software application. Step 1: you need to open the case of Autocom / Delphi hardware. and remove main board from case. Step 2: Find MCU STM32 Big Grin on PCB, to enter MCU into Boot…
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