TTGO ESP32 PocSag receiver

Software

  • ESP32 PocSag Software V0.50  Binary program file to be upload to TTGO.
  • ESP32 PocSag Software V0.51  Binary program file to be upload to TTGO.
    • You can use the espressif ESPTool to do that.

    Donations are welcome ...

    Details

    This firmware is designed for the LiLyGO LoRa32 T3 V1.6.1 433MHz device.
    It allows the reception and decoding of PocSag frames on the frequency range covered by the LiLyGO platform.
    Initial configuration is done via the USB interface and a 'terminal' application such as 'putty'.

    A DAPNET Beacon can be set (V1.51) for testing purpose only by selecting the 439.9875MHz frequency and setting the OM Call and destination address.

    A wifi connection can be configured. This allows to retrieve the date and time via NNTP but also to connect via 'telnet' to the device.
    Data is transmitted on the active link - serial or telnet.

    Usage

    This firmware makes use of the remarkable Radiolib library (V7.5.0) developped by Jan Gromes and its pager example code(https://jgromes.github.io/RadioLib/).

    Wifi setup is made through serial port at 9600bds using the following commands:
    - 1..      Selects running frequency in the internal table
    - S         Wifi SSID
    - K         Wifi KEY
    - REBOOT

    If not done, 'Net: not configured' will be displayed and PocSag decoding starts.

    After REBOOT, the device will search for Wifi and will try to connect it.
    Then date and time will be retrieved on 'pool.ntp.org' and a telnet server starts.

    If no wifi is found or if connect fails, PocSag decoding starts.

    The frequency table (V1.51) is:
    -01   466.025     1200
    -02   466.050     1200
    -03   466.075     1200
    -04   466.175     1200
    -05   466.20625 1200
    -06   466.23125 1200
    -07   439.9875   1200  HAM RADIO DAPNET
    -08   173.5125   1200
    -09   173.550     512
    -10   173.625     512
    -11   173.700     1200
    -12   173.800     1200
    -13   173.875     1200
    -14   173.955     512

    Telnet commands are:
    r        start message output
    s        stop message output
    f        show frequency table
    1..     set PocSAG frequency
    a        2400bds
    b        1200bds
    c         512bds

    Pictures

    Startup displayListening display

    Configuration displayConnected

    Serial configuration display
    Telnet configuration display
    POCSag beacon on ham radio frequencies

    First revision: 2023/04/06
    Last revision: 2026/01/17