I’m using this 4G Module and MQTT. In my testing, the URC replies is not stable. The response data sometimes don’t reply the full data. And after a few try, it only reply the correct data format. On smaller data, there isn’t this issue. I’m sending about 440 characters.
The buffer returns something like this or a cut off data which I sent.
I’ve tried to flash the firmware.
After flashing, I check on my Device Manager and I only have “Quectel USB DM Port”.
I don’t see “AT Port”.
I tried the following but nothing works. I am not able to communicate over serial with the device now.
Hello, I can’t find your email, could you please give me again? In addition, could you please show me the screenshot of the firmware version you received? I’m going to send you this version to try again. EC25EUXGAR08A09M1G
Hi, I have tried and updated the firmware but there is still only 1 DM port.
Please see the attached image. I selected the file “prog_nand_firehose_9x07.mbn” when click “Load FW Files”. Did I flash correctly?
Going through the forums, one possible issue could be the newer firmware updated some settings which disabled some USB ports. Could be due to remapping of memory addresses or ignoring old configurations. I’m just guessing as I do not have the time to investigate.
It’s such a unpleasant experience and now my module cannot even work normally.
I am sure I’m not the first to experience this issue but somehow I cannot find any solution. And Quectel Support is not very helpful.
There’s so many versions, and firmware has to be requested and sent through email. Why is that? Why isn’t there a page for individual modules and all the firmware download with change logs? Why do we have to comb the forum reading issues and only realizing the issue is still not closed?
