Application suddenly does not work sometimes

IoT Modules General wireless topics
1

Hi all,
Has anyone experienced that the application suddenly seems not to work although OpenAT operation still works. The phenomenon is as below:
_ No message is sent via UART anymore.
_ No response for an application-AT-command.
_ Normal response for an OpenAT-command such as: AT+WOPEN? returns 1
_ Ring normally for an incomming call.

If i restarts the application, it will work. If i let it be, it will work again after about some hours!!!

I am using SL6087, Firmware 7.51.
I look forward to any suggestion from someone who experienced this error or knows which causes can potentially make this error?

Thanks in advance
Pham Viet Sam

2

hi,
what exactly your applications is doing?
Could you please provide your exact use case …

Regards,
Rex

3

Hi Rex_alex,
My application periodically reads data from UART port then sends it to a remote server via GPRS. Besides, there are some application-AT-commands that i can type via monitor-USB-port.

Normally, my application works OK but recently, i have encountered that the application sometimes seems to stop or be suspended, i don’t know. The problem state is as above.