Hi,
We are trying to use the ‘Telegram’ messaging service with the UG95 module.
I communicate with the UG95 module via the serial port and AT commands.
I cannot open the connection and get an error when opening.
I used the 'Quectel_WCDMA_UGxx_SSL_AT_Commands_Manual_V1.2.pdf’ document as a reference.
I use the following commands:
AT+CPIN?
Response: +CPIN: READY
AT+CSQ
Response: worst 9, best 15
AT+CREG?
Response: +CREG: 0:1
AT+QISGP=1,1,“internet”,"","",1
Response: OK
AT+QIACT=1
Response: OK
AT+QIACT?
Response: IP address, etc
AT+QSSLCFG=“sslversion”,1,4
Response: OK
AT+QSSLCFG=“ciphersuite”,1,“0XFFFF”
Response: OK
AT+QSSLCFG=“seclevel”,1,0
Response: OK
AT+QSSLCFG=“ignorelocaltime”,1,1
Response: OK
AT+QSSLCFG=“cacert”,1,“RAM:ca.pem”
Response OK
AT+qsslopen=1,1,1,“api.telegram.org”,443,1
Response OK
Response: QIOPEN, 1:550 --> PROBLEM!!!
I do not send data yet, because I cannot open the connection.
I tried various combinations like ports 80,443 and settings with QSSLCFG like setting the security levels to 0,1,2.
I think my SSL config is not set up correctly!
Any help will be appreciated!
TIA
Jan
