Hello.
We have a custom board with a RG255C-GL. We would like to restrict our users from being able to configure the RG255C-GL using the usb as well as streamline the firmware update process on windows.
Can you disable the AT usb device but leave the DM usb device, so that a user can still update the module but not change what it is doing?
How does QFlash make a RG255C-GL enter EDL mode using only the usb? Is it possible to do the same from the command-line?
If there is no command-line tool could one of you explain how it is accomplished, I have measured that when QFlash is trying to make the module enter EDL it sends 0x00 0xfa to the port, but it doesn’t seem to be enough to make the RG255C-GL enter EDL mode.
Hi,@CapnOdin
You can use the “adb reboot edl” command via the ADB tool to make the module enter the EDL mode.
Thank you for your reply.
Is the password needed to enable adb for the module unique to it? If so this would mean that we would need to ask our customers to report back the result of AT+QSECCFG="adb_auth", as the ciphertext would be needed to request getting the password decrypted.
I have seen some people asking to get the password decrypted on this forum, but we have more than just a few devices we would need the password for. Is there a better way to get the decrypted adb passwords?
We are also very interested in disabling the usb AT serial port, if you know something about how to achieve this we would much appreciate any info on the matter.
Hi,@CapnOdin
To disable the AT port, you can try using the command AT+QCFG="usbcfg",0x2C7C,0x0316,1,1,0,1,0. Regarding the ADB functionality, the standard version can only be unlocked via a password. You may contact your local sales representative or FAE to apply for the open version firmware, which does not require a password.