Receiving SMS stopped working
06-26-2022, 04:24 PM
A breakthrough, at last!!!
But first, after installing Biktorjg's firmware I found that the Quectel firmware is still used. Biktorjg's stuff acts kinda like a layer on top of the Quectel stuff (which he calls the ADSP firmware. I upgraded that to 01.002.01.002, but I think the firmware upgrades are irrelevant to this problem.
I had spent time exploring the AT commands and found "AT+CMGL=4" to display all messages in the modem's storage. With my Ting SIM installed, that command consisterntly returns an empty response. With the Verizon SIM and a fresh boot, it returns 35-40 messages. I then used "AT+CMGD=,2" to purge all read incoming and sent outgoing messages. After that I was able to properly receive SMS on Verizon and "AT+CMGL=4" shows an empty response.
I think this clearing of messages will need to be done whenever ModemManager is started. Needs more research, but a path to a permanent solution seems to be at hand. Finally!
But first, after installing Biktorjg's firmware I found that the Quectel firmware is still used. Biktorjg's stuff acts kinda like a layer on top of the Quectel stuff (which he calls the ADSP firmware. I upgraded that to 01.002.01.002, but I think the firmware upgrades are irrelevant to this problem.
I had spent time exploring the AT commands and found "AT+CMGL=4" to display all messages in the modem's storage. With my Ting SIM installed, that command consisterntly returns an empty response. With the Verizon SIM and a fresh boot, it returns 35-40 messages. I then used "AT+CMGD=,2" to purge all read incoming and sent outgoing messages. After that I was able to properly receive SMS on Verizon and "AT+CMGL=4" shows an empty response.
I think this clearing of messages will need to be done whenever ModemManager is started. Needs more research, but a path to a permanent solution seems to be at hand. Finally!
