FX100 Modem Hangs on Software Reset

IoT Gateways Legacy FX/FXT series
1

Hi,

I am having a problem with FX100 Modems hanging after a software reset using AT+CFUN=1. I am using Firmware 7.52.0.A1. When I say a FX100 modem hangs, I mean that it stops working so it can no longer accept any subsequent AT commands. In this case, the only way I can get the modem working again, is to power it off and back on again and then it resets itself as expected. Normally, I can remotely perform a software reset by issuing the AT+CFUN=1 command over the serial interface, and after several seconds, the modem will reset as expected.

Does anyone know how to fix this problem with the FX100 modem hanging after a software reset?

I’ve tried re-downloading the firmware and found that in a few instances that this seems fixes the problem with the modem so it will always respond correctly to the AT+CFUN=1 command, while for others it makes no difference. For some FX100 modems I’ve found that they will always hang after a AT+CFUN=1 command is issued. I’ve also found that for other FX100 modems, they will only hang once in a great while, and for the “good ones”, they havent’ been seen to hang yet.

Does the inability of a new FX100 modem to correctly respond to the AT+CFUN=1 command mean that the modem is bad and therefore cannot be fixed?

Does anyone know when Firmware 7.53 is due to be released? Maybe this will fix the problem…

2

hi,
Are you using hyper terminal or Dev studio?
Normally in hyper terminal if we are using USB port, after AT+CFUN=1 command if we do not disconnect the port in hyper terminal then there is a chance that modem will not response to commands. This is because after reset module will try to connect to the same port, but I this case it is open. So AT command port cannot be able to connect which lead to a conclusion that our module hangs. Is this the same case for you??
If so then disconnect the port after AT+CFUN=1 command and connect again after reset and complete port enumeration….

Regarding 7.53 FW release… will check internally and will inform…

Thanks,
Rex