Incoming SMS not reported via MQTT

[JCh]

Hello,
I am using Kincony G1 with SIM7600 module fw KCS 3.19.1 and MQTT integration.

According to the forum documentation, incoming SMS should be reported via MQTT STATE  topic in this format:

Code:

{
"sms_recv": {
"phone": "+8612345678901",
"content": "example"
}
}

Unfortunately, I am unable to get this working.
My setup:

• Device: Kincony G1
  
• GSM module: SIM7600
  
• Firmware: KCS v3.19.1
  
• MQTT broker: working correctly
  
• Home Assistant 2026.2.3
  
• Topics: 
   G1/XXXXXXXXXXXX/SET -  working (sending SMS works)
   G1/XXXXXXXXXXXX/STATE -  working (inputs, call_ring, etc.)
  

What works:

• MQTT STATE reporting for inputs (input1…input12)
  
• Outgoing SMS via MQTT (run_sms)
  

What does NOT work:

• Incoming SMS and calling are not reported to MQTT
  
• No (sms_recv) payload is published to STATE topic
  

Tests performed:

• Clean SIM card (no stored SMS)
  
• Very simple SMS content: TEST (no diacritics, no multipart)
  

When an SMS is received, no new MQTT message is published at all.

Question: Is sms_recv currently supported on Kincony G1 with SIM7600 in official KCS v3 firmware?

If yes:

• Is there any additional configuration required?
  
• Is SMS TEXT mode (AT+CMGF=1) required and handled automatically by firmware?
  

If not:

• Can you confirm that incoming SMS → MQTT reporting is currently not supported / disabled for this hardware?
  

Thank you for clarification.

[admin]

after China New Year holidays , we will test it then feedback to you.

[admin]

maybe you have not use the admin's phone number to send SMS. here are photo tested with G1:
   
use this KCS v3 firmware to test.
   
   
   
this step is important, must need enable 4G module, set the admin's mobile phone number.
   
   

[JCh]

Hello,

sorry for the late reply

I can confirm via MQTTBox that:

• run_sms → works
  
• run_call → works
  
• call_ring → works
  

there is NO sms_recv message at all when receiving SMS

This shows GSM → MQTT works, but sms_recv is not generated.

Screenshot attached.

[admin]

suggest you download newest KCS v3 firmware, at here:
https://www.kincony.com/forum/showthread.php?tid=9173

[JCh]

I found the root cause of the issue.

sms_recv works correctly when using a different SIM card , but does not work with Vodafone prepaid (Oskarta) SIM.

So the problem is not MQTT or configuration, but SIM compatibility.

It seems that the modem does not trigger SMS notification in this case.

It looks like firmware only supports some SMS notification mode.

(I updated the firmware to the latest version as you wrote)