I'm trying to receive UDP packets on my Sodaq Sara R412M AFF.
During connection setup I have some UDP handshaking, which is working fine (both send and receive).
Then the device is idle for a while, waiting for new commands.
If I send a new UDP package towards the device after 10 seconds, it is no longer received on the device (I check with USORF=0,0 but also monitor for UUSORF).
I assume that the socket is no longer active after x seconds because of the UDP protocol specification?
I also tried to implement AT+USOLI=0,4200, but I always get +CME ERROR: Operation not allowed.
I thought maybe it's because the socket is still open so I also tried to close the socket but also AT+USOLI=1,4200 but the error remains the same. What does it mean?
This is the command list I use:
+CME ERROR: Operation not allowed
M0.09.00 [Jan 31 2019 18:59:31]