Modem

SUBJECT VIEWS FAQ TYPE MODEL LAST UPDATED DETAIL
The module cannot register to the telecommunications network, but the SIM card has displayed Ready, but AT+COPS cannot register normally. How can I confirm? 6 Applications 2021-12-01
The module has been used for a period of time, and the SIM card can be registered, but suddenly it can send text messages sometimes, sometimes not. How can I confirm the problem? 4 Applications 2021-12-01
Through SCADA software and module communication, one of the two devices can send text messages, and the other can communicate but cannot send text messages. How can I confirm the cause of the problem? (GTM-204M) 2 Applications 2021-12-01
The module can’t recognize the SIM card, and the AT+CPIN command will reply to ERROR. The result is still the same after changing the SIM card and rebooting. How can I confirm? (GTM-204M) 2 Applications 2021-12-01
I used GTM-204M to make a call, but the user has not answered the call, but why does the Log message show that it has been answered? (GTM-204M Series) 12 Applications 2020-11-24
I confirm that the module is registered through AT Command, but the network connection still cannot be established. What should I do? (GTM-204M Series) 9 Applications 2020-11-24
Why can't I get GPS related information through NMEA Port? 3 Troubleshooting 2020-11-24
The Com port opening method seems to be different from the I-8213W-4G. How do I use it? 3 Troubleshooting 2020-11-24
How to test SMS function of I-8212W-3GWA/I-8213W-3GWA on ViewPac or WinPac (WinCE)? 1 Troubleshooting 2020-11-24
How to test SMS function of I-8212W-3GWA/I-8213W-3GWA on XPac-8000? 2 Troubleshooting 2020-11-24