We’re trying to get this module to open a TCP socket (google in the example)
At the critical point of AT+USOWR=0,“126.96.36.199”,443 we get
**+CME ERROR: Operation not allowed
Vodafone UK using an NBIoT SIM.
Here’s the module info (ATI)
Revision: M0.10.00 [Mar 28 2019 17:13:41]
Here is the list of commands at system startup
AT+UBANDMASK="524420" // This responds ERROR
Eventually, AT+CSQ returns CSQ: 8,99
So we have an IP and DNS items.
AT+USOCR=6 returns +USOCR: 0 (socket 0 ready for use)
HOWEVER, trying to open a TCP socket (to google https for example) AT+USOWR=0,“188.8.131.52”,443 returns
+CME ERROR: Operation not allowed (manual says " The MT is in a state which does not allow performing the entered command")
Am I missing something? It seems we have a valid Vodafone connection, an IP address, Vodafone console recognises the connection and a socket to use, but yet the Operation is not allowed.
Also the battery is charged and connected which I know is a requirement.
I would be very grateful for any help with this.