Hello,
I am developing an application using the Quectel OpenCPU C SDK on the EC200U series.
Current Environment:
SDK Version: LTE01R03A06
Original Target Hardware: EC200UCN_AA (Compiles and flashes successfully)
New Target Hardware: EC200UEU (PCIe module)
The Issue:
When I change the target chip in the build command to EC200UEU, the .pac files generate without compilation errors. However, after successfully flashing these files onto the EC200U-EU PCIe module, the chip becomes completely unresponsive. It does not boot, and the USB/COM ports are no longer detected by the host system.
Could you please clarify the following questions to help us resolve this procedure:
SDK Compatibility: Is the SDK version LTE01R03A06 fully compatible with the EC200U-EU variant, or is a separate, dedicated OpenCPU SDK version required for the EU variant?
Hardware/Pin Configuration: Does the EC200U-EU PCIe form factor require different baseline GPIO configurations or boot pins in the target source code compared to the EC200U-CN component?
Recovery Procedure: Since the USB ports are no longer recognized after flashing, what is the recommended hardware method (e.g., forcing USB_BOOT pin high) to force the EC200U-EU PCIe module into emergency download mode so we can unbrick the device?