Open ctschach opened 2 years ago
Sounds a like firmware issue on the modem. In such a case, it is a good idea to reset the modem (either by its reset pin, or by removing power and re-applying power under software control from the raspberry pi).
On Thu, May 26, 2022 at 9:29 PM Carsten Tschach @.***> wrote:
Hi, I have a Waveshare SIM7000G module connected via USB to a Raspberry Pi.
I frequently send AT commands for HTTP Posts to the modem on /dev/ttyUSB2.
That works fine for a while until the modem stopped to respond to AT commands.
Now I noticed, that I can connect to /dev/ttyUSB3 and send a single AT. Once I did this, the modem also responds to AT commands on /dev/ttyUSB2 again.
Doesn‘t make a lot of sense to me. Any ideas?
thanks…
— Reply to this email directly, view it on GitHub https://github.com/botletics/SIM7000-LTE-Shield/issues/298, or unsubscribe https://github.com/notifications/unsubscribe-auth/AFAGDCW7HB25W6OO5LMSXA3VL7NKJANCNFSM5XCIO27A . You are receiving this because you are subscribed to this thread.Message ID: @.***>
Sounds a like firmware issue on the modem. In such a case, it is a good idea to reset the modem (either by its reset pin, or by removing power and re-applying power under software control from the raspberry pi). …
I do not have the reset pin connected as I only use The USB connection. What do you mean with „re-applying power“ on the Raspberry Pi? How do I control the power of a plugged USB device? Was not aware that this isnpossible.
BTW, I tried to use „AT+CFUN=6“ in /dev/ttyUSB3 and that do reset the modem. However, the problem of not responding reoccurs much faster.
Hi, I have a Waveshare SIM7000G module connected via USB to a Raspberry Pi.
I frequently send AT commands for HTTP Posts to the modem on /dev/ttyUSB2.
That works fine for a while until the modem stopped to respond to AT commands.
Now I noticed, that I can connect to /dev/ttyUSB3 and send a single AT. Once I did this, the modem also responds to AT commands on /dev/ttyUSB2 again.
Doesn‘t make a lot of sense to me. Any ideas?
thanks…