CoAP examples



  • Hi everyone,
    I’ve been trying to figure out how to use CoAP with my SIM7070G.
    The example from the hardware manual looks like this:
    SIM7070_SIM7080_SIM7090 Series_CoAP_Application Note_V1.02.pdf-000349.jpg

    I’ve tried the following but I receive a timeout response:

    AT+CNACT=0,1
    
    OK
    
    +APP PDP: 0,ACTIVE
    
    AT+CCOAPPDPID?
    
    +CCOAPPDPID: 4
    
    OK
    
    AT+CCOAPPDPID=?
    
    +CCOAPPDPID: (0-4)
    
    OK
    
    AT+CCOAPPDPID=0
    
    OK
    
    AT+CCOAPINIT
    
    OK
    
    AT+CCOAPURL="coap://172.27.131.100:5683"
    
    OK
    
    AT+CCOAPPARA="CODE",1,uri-path,0,"home/query",uri-query,0,"address=1",payload,0,"hello world"
    
    OK
    
    AT+CCOAPACTION
    
    +CCOAPACTION: 0,1
    
    OK
    
    
    +CCOAPACTION: 2,1
    
    AT+CCOAPTERM
    
    OK
    

    I think I read somewhere that the SIM needs to be provisioned to use CoAP…
    Is this true or did I just mess up my AT commands?

    Thank you in advance.


  • Deutsche Telekom IoT

    The CoAP stack of the CoAP server is based on Californium version 1 and uses the implemenation as it has been pushed by OceanConnect from Huawei. Although this implementation is not 100% standard compliant there are ublox n211 and quectel bc95 in the market which support this floavor of CoAP

    I checked the AT command guide of the SIM7070G. It looks like only the standard CoAP is supported.

    IoT Creators will provide the standard complient CoAP stack in Q1 2021.

    Hope this helps.

    Regards, Roland


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