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Poor RSSI Problem with SX1276MB1MAS

Semtech Transceivers SX127x family
#1

Hello,
I have an RSSI problem with mbed LoRa Shield boards(SX1276MB1MAS). I’m using Arduino Uno with the Arduino-LMIC library.
This is my settings:

  • output power: 14dbm
  • BW: 125KHz
  • SF: 7
  • Channel: 868MHz (HF)
  • and an antenna with 1/4 wave length, gain of 0.7dbi
    When sending in a room no more than 1 meter apart, I get a RSSI of around 90 dbm.
    I’m really confused and expected higher ranges in LoRa.
    I would appreciate your assistance with this RSSI problem.
#2

You need to check if the SX1276MB1MAS module needs or has any direct RX\TX switching, if it does it might not be compatible with the Arduino-LMIC library.

#3

Maybe following discussion on TTN forum may give some clues.