At the moment it’s pretty basic, but works! Source is available via SVN (see download page)
The mode is set at powerup by pressing the manual trigger button. If pressed then mode is set to Master, default powerup is in slave mode (i.e.. do nothing). Master mode is identified by a single flash of the LED, Slave is a double flash. This way any of the units can be master or a slave.
Master mode sends a remote trigger command to the slaves when the manual trigger button is pressed, or a trigger signal is detected on the Trigger Input. The LED is light briefly when triggered.
Slaves will only trigger the local strobe if trigger test button is pressed, or a remote trigger command is received via RF. The status LED will light briefly when triggered by either of these means.
The Master will send out a keep-alive broadcast once every 5 seconds. The units LED (master and slaves) will blink briefly to indicated successful RF Link.