I am currently using HL8548 to develop my application. The basic function as call, SMS works well for a long time until my boss using the product and goes somewhere.
The problem is sometimes my boss cannot call and send SMS although the previous time he can, I have to view the log: when starting a call, it respond “NO CARRIER”, sometimes it just respond “+XCALLSTAT: 1,2” then doesn’t respond anymore.
I have tried to fix problem by send AT command: “AT+KSRAT=1” or “AT+KSRAT=2” or “AT+KSRAT=4”, it can work well, and sometimes these command doesn’t respond. The problem sometimes I meet in some modules and very confuse for us.
The firmware we are using is: RHL85xx.220.127.116.11.201804161340.x6250_2
I need your help. Thank you very much!
Which CLIR value you set for HL8548? Please try below and make call
Please share any concerns you have. Help us tick Solution if your problem is solved
I think my module is not attached to the network. With your help, I have tried “AT+CLIR?” and it responds “+CLIR: 2,0”
Please check network registration and operator selection by command below
If the response of cgreg? isn’t 1 or 5, your module has not registered successfully. Please double check your SIM/operator
I will check your command if the module meets the problem. Sometimes, I fixed the problem by sending “AT+KSRAT” or reboot the module but this inconvenience for user, I am finding new solutions to fix it.
The write KSRAT command automatically reboots the module to force a re-initialization of the radio with the selected RAT so I guess your issue is gone after reboot module action. Please share any concerns you have and help tick Solution if your question is answered
I need to reboot the module in some cases it work not as expected.
Thanks for your help.