FoxHuntController for Arduino

This project is for controlling a ham radio "fox" for a "fox-hunt".

The fox will persist of an arduino uno + a DFrobot sim808 gsm/gps shield. The shield is both for receiving a time signal and for remote control of the fox.

Transmission

The signal that is transmitted, is build like this:

• Call signal
• 2 extra fox ID characters
• Bearing signal
• 4 x fox ID character
• Bearing signal
• Call signal
• 2 extra fox ID characters

SMS Commands

The following SMS commands are supported (commands are case-insensitive)

STATUS Returns a status message

ENABLETX Enable transmission. Transmission is allowed. Enable/disable tx is a master-switch for turning transmission of on.

DISABLETX Disable transmission. No transmission is allowed

ENSCHED Enable schedule. If enabled the fox will only transmit within the allowed schedule / timeslot.

DISCHED Disable schedule. If disabled the fox will transmit with no consideration to configured schedule/timeslot.

PING Sends 3 bearing signals, each lasting 15 seconds

I: Sets the transmission interval (5 and 10 are allowed). Eg. I:5 to set 5 minute interval

A: Sets the allowed transmission timeslot/schedule. A:- Eg. A:0800-2230 configures the fox to not transmit before 08:00 and not after 22:30. Allowed timeslot/schedule can not cross midnight. Please note that all times are in UTC.

DIT: Sets the dit/dot length in milliseconds. Allowed interval is 20-140 (inclusive). Eg. DIT:120 sets the ditlength to 120 milliseconds

FOX: Sets the fox number. 0-7 are arllowed (both inclusive). Eg. FOX:4 sets the foxnumber to 4

Status message

The status message contains these elements:

• Fox: fox number/fox letter
• TX: Transmission on/off
• Dit: (it-length / dot-length
• T: Local time in UTC
• Loc: location latitude,longitude
• Int: transmission interval in minutes (5/10)
• Period: period the fox is allowed to transmit (eg 0800-2200)