I have a project using pcDuino3b (wifi built-in) to collect data from sensors. I also use an arduino nano as a watchdog timer to reset pcDuino through its RST pin (reset signal from arduino was converted to 3.3V).
I tested the system by let Arduino resets pcDuino for 10min period. Arduino did successfully restart pcDuino. However, after 3-4 times, wifi module stops working after the reset. I connected to pcDuino (still working) through OTG and could not find wlan5, lsusb command also show no sight of wifi module. Wifi module will work normally after I unplug and plug in again, or hold down the restart button of pcDuino for more than 1 second (it will turn off power on wifi module).
This problem can recreate by hand by connecting RST pin to GND 3 to 4 times.
Would you guys help me with this problem?