# FM APRS settings extension

This extensions allows to specify some additional settings for the FM APRS System. As AnyTone devices allow only for one FM APRS system, these settings can be considered radio wide.

##

    positioning:
      ...
      - aprs:
        ...
        anytone:
          txDelay: 60 ms
          preWaveDelay: 0
          passAll: false
          reportPosition: false
          reportMicE: false
          reportObject: false
          reportItem: false
          reportMessage: false
          reportWeather: false
          reportNMEA: false
          reportStatus: false
          reportOther: false
          frequencies:
            - id: af1
              name: APRS US
              frequency: 144.39 MHz

The AnyTone FM APRS extension is a mapping named anytone. It contains the device specific settings for that FM APRS system. AnyTone devices only allow for a single FM APRS system.

## FM APRS system extension fields

txDelay

- A delay before the start of the transmission. Specified with a resolution of 20ms. The default value is 60ms.

preWaveDelay

- A delay between the start of the carrier and the actual APRS transmission. Default 0ms.

passAll

- Basically disables the CRC check on received APRS messages.

reportPosition reportMicE reportObject reportItem reportMessage reportWeather reportNMEA reportStatus reportOther

- A bunch of flags indicating what is being reported (?!?).

frequencies

- While AnyTone only allows for a single set of parameters for the FM APRS transmission and reception, it allows for several frequencies. The default frequency is specified by the revert channel of the FM APRS system.

  Seven additional frequencies might be specified through this list. Each entry is a mapping, specifying a unique ID for the frequency, a name and the actual frequency. The id can then be used to reference this FM APRS frequency in the AnyTone channel extension.