AMB82-mini USB host CDC ECM fail to SIM7600G-H

FreeRTOS USB
1

Hi, Pammy,
I use rtl8735b usb host to connect SIM7600G-H via CDC ECM.

My SIM700G-H test on Linux vid CDC ECM is ok, so I use same method to rtl8735b

and I got following message:

#UECM

[ECM] USB host ECM demo started…
Enter USB Ethernet host mode

[MEM] After do cmd, available heap 110186176

usb otg mode 1
USB_Init
ecm init fail
The bulk_task already deinit
The intr_task already deinit
USB_DeInit
ecm deinit ok
ecm_status 2

How can I connect to the SIM7600G-H using USB CDC ECM mode?

2

Can anyone answer this?

3

Hi @termy,

Thank you for waiting while we reviewed the requested feature.

The current USB ECM example is intended only for USB-to-Ethernet adapter use cases, and is not compatible with 4G dongle usage.

Support for 4G dongles is still under development and will require some time to complete.

We will provide an update once this feature becomes available in the SDK.

Thank you.