mpkleine / radiorepeater

This program will allow users to connect two radios in a repeater fashion. The main use for this type of device would be to link a radio receiver with a radio transmitter to create an amateur radio repeater. See the README.md file for all of the details.

RadioRepeater

This program will allow users to connect two radios in a repeater fashion. The main use for this type of device would be to link a radio receiver with a radio transmitter to create an amateur radio repeater. This program will manage the keying of the transmitter, the keying of an external CW tone board (initially built for a Compsec TS-64 board).

The COR input signal is anded with the incoming CTCSS signal to provide a signal to actually turn on the system. Once that signal pair is received, the TXPTT signal and TXCTCSS signal is turned on, to bring up the transmitter. This will be subject to a 3 minute RX time-out timer.

This program to provide a 10 minute TX CW Identification signal. The timing of this can be configured from config file. The output pulse length is set to 100 ms, and is configurable via the config file.

There's a PTT drop timer that will hold the TX PTT up for a given amount of time, so that the CTCSS will disconnect at the far end before the squelch kicks in, and blasts the end user.

There's a pulse timer that lets the CWID pulse width to be assigned by the user.

All inputs and outputs are configured to use/accept either active High, or active Low inputs, based on a configuration setting.

Hardware used for this project: Raspberry Pi 2 SDRAM 8gB to 16gB Comspec TS-64WDS tone encoder http://www.com-spec.com/tone_signaling/images/pdf%20TS-64WDS%20Manual.pdf Hardware CW Identification generator Comspec ID-8 (active high, or low to trigger the device). The ID-8 has a PTT output that grounds a tranmsitter input. Triggering the ID-8 will bring up the PTT of transmitter, (not the CTCSS of the encoder), and wait for a small time until the transmitter comes up, send the CW id, and then drop the transmitter PTT. If the RadioRepeater happens to come up while the CW ID is occuring, the CTCSS
encoder will turn on, and the incoming audio will mix with the CW ID tones, and they will be heard mixed on the output of the transmitter. http://www.com-spec.com/insheet/id8insc.pdf

The output display of the RPi2 (HDMI) shows a dashboard that lists the state of all 5 input and output lines, with the last time that the signal was toggled off/on.

Raspberry Pi 2 - GPIO pin-out connections:

GPIO 5 - RX COR input (from Kenwood xxx receiver radio) (active high, or low, configurable)

GPIO 6 - RX CTCSS input (from Comspec, or Kenwood radio, not sure which) (active high, or low, configurable)

GPIO 12 - TX PTT Output (to Kenwood transmitter radio) (active low, but configurable)

GPIO 13 - TX CTCSS Output (active low, but configurable)

GPIO 16 - TX CW Identification device (active low, but configurable at either end)

GPIO pin configuration is soft coded, and can be modified by configuration.