RSSI and SNR in JSON response from API



  • Re: RSSI van de zendmast in impact

    I was wondering if this “feature” is on the roadmap anytime soon.
    Am planning to collect RSSI and SNR together with the usual payload, but it would be better if the UE doesn’t need to include it of course 😉 .

    Using a SIMCom SIM7020G.
    Command “AT_CENG?” is able to retrieve all sorts of connection information, including RSSI and SNR.


  • Deutsche Telekom IoT

    RSSI (Received Signal Strength Indicator) is an estimated measure of power level on client device side and SNR (Signal-to-Noise-Ratio) compares the level of a desired signal to the background noise level at a recipient. Both are very much dependent on your (devices) position in the electromagnetic field emitted by various cells from our radio towers. And very much influenced by surrounding materials, reflections etc.
    I think you can’t derive the device’s RSSI and SNR measurements from a tower’s values.
    What exactly is the use case that you want to fulfil?



  • @Uta You don’t need to derive it from the tower, the UE will measure those anyway (and I think it’s part of power control mechanisms). The tower also measures it’s own RSSI, not sure which one @MeneerJacco is referring to.

    Anyway, it’s only a couple of bytes so doesn’t make a huge difference if it’s transmitted by the UE



  • @Stefan-de-Lange , @Uta I am referring to the device’s RSSI and SNR. I want to be able to check signal quality, as I have some experimental asset trackers with GPS that I am currently testing with.

    With LoRaWAN devices, I found it very convenient that all kinds of additional “network”-information was available in the MQTT response (JSON) from the API.