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Hi,
How can I upload a .pem file to the A7670 modem? I am using an ESP23-S3 A7670E 4G development board and I want to connect to an MQTT broker over TLS. To do so I need to upload a CA bundle to the modem. I have used use the AT command AT+CCERTDOWN= to define the name and size of the .pem file. However I cannot find any information on how to upload the .pem file itself. Can you please advice?
Thanks,
Rui
It is recommended to upload .pem using the following command:
AT+CCERTDOWN="cacert.pem",899
AT+CCERTDOWN="client-cert.pem",1468
AT+CCERTDOWN="client-key.pem",1707
at+ccertlist
AT+CSSLCFG="cacert",0,"cacert.pem"
AT+CSSLCFG="clientcert",0,"client-cert.pem"
AT+CSSLCFG="clientkey",0,"client-key.pem"
AT+CSSLCFG="sslversion",0,4
AT+CMQTTCFG= "version",0,4
AT+CSSLCFG="authmode",0,2
AT+CSSLCFG?
AT+CMQTTSTART
AT+CMQTTACCQ=0,"MTIzODg0OTc1Mzg3ODM2NDE2MA==",1
AT+CMQTTCONNECT=0,"tcp://61.136.151.96:8883",60,1,"MTIzODg0OTc1Mzg3ODM2NDE2MA=="
report
