build_aprs_mice

kenwood_thd75

Function build_aprs_mice 

Source 
pub fn build_aprs_mice(
    source: &Ax25Address,
    latitude: f64,
    longitude: f64,
    speed_knots: u16,
    course_deg: u16,
    symbol_table: char,
    symbol_code: char,
    comment: &str,
    path: &[Ax25Address],
) -> Vec<u8> ⓘ
Expand description

Build a Mic-E encoded APRS position report for KISS transmission.

Mic-E is the most compact position format and the native format used by Kenwood HTs including the TH-D75. The latitude is encoded in the AX.25 destination address, and longitude + speed/course are in the info field.

Encoding per APRS101 Chapter 10:

  • Destination address: 6 chars encoding latitude digits + N/S + lon offset + W/E flags
  • Info field: type byte (0x60 for current Mic-E) + 3 lon bytes + 3 speed/course bytes
    • symbol code + symbol table + comment

Returns wire-ready bytes (FEND-delimited KISS frame).

§Parameters

  • source: The sender’s callsign and SSID.
  • latitude: Decimal degrees, positive = North, negative = South.
  • longitude: Decimal degrees, positive = East, negative = West.
  • speed_knots: Speed in knots (0-799).
  • course_deg: Course in degrees (0-360; 0 = unknown).
  • symbol_table: APRS symbol table character (/ for primary, \\ for alternate).
  • symbol_code: APRS symbol code character (e.g., > for car).
  • comment: Free-form comment text.