Hi All, I am trying to use BPI-4G LTE module with BPI-R2 board and sending some sensor’s datas into cloud server continuously. However, I am facing the problem of connection issues on the 4G module after one/two days.
I am using 14 pin header method to connected 4G module with R2 board. The module is working fine once the R2 board booted and able to use the internet facility without any issues. However, The wwan0 automatically disconnected and modem devices (ttyUSB*) are disappeared after one or two days. Though the board was soft rebooted, the same issue persisted and the wwan0 is enabled. At this stage, the commands, mt_gpio.sh 34 dir out and mt_gpio.sh 34 val 1 are useless until I hard reset the BPI-R2 board.
The entire above issues solved and the module started working only after the BPI-R2 board was completely rebooted by hard switch.
Can someone help me on this strange issue, why the 4G module devices(ttyUSB*) are automatically disappeared after few days?. Also like to know if there is any way to reset the 4G module to initiate it as like hard reboot of R2 board. Kindly note that the entire device will be installed at a remote place and we cant always reset the device by manually.
Its looks like the 4G module firmware is crashed and wont work until the entire BPI-R2 boot hard reset.
TIA.