Does anyone successfully connected BC660K-GL with MQTTS server? I was able to connect to an MQTTS connection with BC66. But with the same certificate and combining it with MQTT and SSL Application notes for BC660 is not working for BC660K-GL. The response i get after AT+QMTCONN=<TCP_connectID>,[,[,]] is +QMTSTAT: <TCP_connectID>,1
error code is 1 which means “Connection is closed or reset by its remote peer” as per MQTT Application note.
Thanks,
Amal Prakash
Could you show me your detailed AT process?
Following are the commands used with BC660
RDY
+CFUN: 1
+CPIN: READY
+IP: 2405:0203:40a4:19ba:0000:0000:fb48:990e
AT+QSCLK=0
OK
AT+QBAND?
+QBAND: 5
OK
AT+QSSLCFG=0,0,“seclevel”,1
OK
AT+QSSLCFG=0,0,“cacert”
-----BEGIN CERTIFICATE-----
…<actual_certificate>…
-----END CERTIFICATE-----
+QSSLCFG: 0,0,“cacert”,1756
OK
AT+QSCLK=1
OK
AT+QMTCFG=“ssl”,3,1,0,0
OK
AT+QMTCFG=“version”,3,1
OK
AT+QMTOPEN=3,“<target_host>”,1887
OK
+QMTOPEN: 3,-1
+QNBIOTEVENT: “ENTER DEEPSLEEP”
First, verify that your MQTT server is connected using MQtt.fx.
Second, you can turn off PSM mode and try again by executing the following instructions
The AT + QSSLCFG = 0, 0, “sslversion”, 4
I’ve verified the server with MQtt.fx software and it connects without any error. Also i’ve added the AT command you mensioned. But it shows the same error - +QMTOPEN: 3,-1
Can we do an example with the following test MQTT server with SSL?
If you can try this setup working with BC660, then i think that will be helpful ! Atleast for testing the SSL/MQTTS
I have connected it. The BC660K-GL works differently than the BC66. When you send a message. It expects a prompt, then send the message, but it looks like you are having problems with the certificate.
'qsslcfg=1,5,"cacert"', # Send a cert
'qsslcfg=1,5,"seclevel",1', # Set security to client cert (1 server cert required)
'qmtcfg="ssl",0,1,1,5', # Turn on SSL
'qmtopen=0,"test.mosquitto.org",8883', # Open the MQTT broker
'qmtconn=0,"{}"',
I tested with the public Eclipse broker. and it worked on both.
Thanks @PeteD for the AT Commands.
I’ve also worked with BC66 with the above commands and i was able to connect to mqtts server and send messages. But now i upgraded to BC660K-GL and with the same procedure i did for BC66. but it fails on BC660K-GL
I have both the BC66 and the BC660K-GL. Try it with the mosquitto public broker and see if it works.
Hi @PeteD ,
I tried but failed. Could you please share the AT Commands you used for BC660K-GL for connecting to mosquitto?
Please provide your detailed test commands and results, do not hide any information, I will perform the same verification
That is client specific information. I cannot share it publically. The system works the same as the publically available mqtt broker server broker.emqx.io. That is why i tried with this → Free Public MQTT Broker for IoT Testing | EMQ. There they have their specific certificates also.
i will upload its log also.
Let me try your document also of EMQX Cloud
please save EPAT’s log,Send to me
Sure. i will send it now.
Plese check your inbox
