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Merge pull request #26 from clifjones/feature/vr-n76
VGC VR-N76 Bluetooth TNC initial support
This commit is contained in:
thetechprepper
Executable
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#!/bin/bash
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#
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# Authors : Gaston Gonzalez
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# : Clifton Jones
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# Date : 1 January 2025
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# Updated : 19 February 2025
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# Purpose : Utility for accessing the Bluetooth TNC on the VGC VR-N76
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#
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ACTIVE_RADIO="${ET_HOME}/conf/radios.d/vgc-vrn76.bt.json"
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DEVICE_NAME="VR-N76"
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BT_DEVICE="/dev/rfcomm0"
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AX25_PORT="wl2k"
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AX25_CONF_FILE="/etc/ax25/axports"
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ESC="\x1B"
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RED="${ESC}[1;31m"
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BLUE="${ESC}[1;34m"
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GREEN="${ESC}[1;32m"
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WHITE="${ESC}[97m"
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YELLOW="${ESC}[1;33m"
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NC="${ESC}[0m"
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function usage() {
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echo "Usage: $(basename $0) <command>"
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echo " connect - Connect to radio via Bluetooth"
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echo " pair - Pair radio (one-time operation)"
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echo " unpair - Unpair radio"
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}
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if [ $# -ne 1 ]; then
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usage
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exit 1
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fi
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error_message() {
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echo -e "${RED}"
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et-log $*
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echo -e "${NC}"
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}
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info_message() {
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echo -e "${BLUE}"
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et-log $*
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echo -e "${NC}"
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}
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success_message() {
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echo -e "${GREEN}"
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et-log $*
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echo -e "${NC}"
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}
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exit_if_no_active_radio () {
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if [ ! -e ${ACTIVE_RADIO} ]; then
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error_message "${ACTIVE_RADIO} file not found"
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exit 1
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fi
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}
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get_mac_or_exit () {
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MAC=$(cat ${ACTIVE_RADIO} | jq -e -r .bluetooth.mac)
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if [ $? -ne 0 ]; then
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error_message "No MAC address found in ${ACTIVE_RADIO}."
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exit 1
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fi
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}
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update_ax25_conf() {
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[ -z "$ET_USER_CONFIG" ] && ET_USER_CONFIG="${HOME}/.config/emcomm-tools/user.json"
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CALLSIGN=$(cat ${ET_USER_CONFIG} | jq -r .callsign)
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if [ "${CALLSIGN}" = "N0CALL" ]; then
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error_message "No callsign set. Run et-user first."
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exit 1
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fi
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GREP_OUT=$(grep ${AX25_PORT} ${AX25_CONF_FILE})
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if [ $? -eq 0 ]; then
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# Delete all existing AX.25 port entries. Note: we can't use sed here
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# since we do not have permission to create a temporary file with
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# inline replacement. ed modifies the file directly.
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printf "g/^${AX25_PORT}/d\nw\nq\n" | ed ${AX25_CONF_FILE} > /dev/null 2>&1
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fi
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info_message "Adding AX25 port for ${CALLSIGN}"
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echo "${AX25_PORT} ${CALLSIGN} 1200 255 2 1200 Packet" >> ${AX25_CONF_FILE}
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}
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stop_all_services() {
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PS_OUT=$(ps -ef | grep [k]issattach)
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if [ $? -eq 0 ]; then
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info_message "Killing kissattach process(es)..."$
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sudo killall kissattach
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fi
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sleep 3
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PS2_OUT=$(ps -ef | grep -v krfcommd | grep [r]fcomm)
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if [ $? -eq 0 ]; then
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info_message "Killing rfcomm process(es)..."
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sudo killall rfcomm
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fi
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}
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exit_if_no_active_radio
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case $1 in
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pair)
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MAC=$(cat ${ACTIVE_RADIO} | jq -e -r .bluetooth.mac)
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if [ $? -eq 0 ]; then
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PAIR_STATUS=$(bluetoothctl info "${MAC}" | grep "Paired:" | awk '{print $2}')
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if [ "${PAIR_STATUS}" == "yes" ]; then
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error_message "Device with MAC ${MAC} is already paired."
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exit 1
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fi
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fi
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echo -e "${YELLOW}"
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echo -e "1. Turn on the VGC VR-N76"
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echo -e "2. Goto Menu > Pairing and press OK"
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read -p "3. Press [ENTER] when done."
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info_message "Searching for ${DEVICE_NAME}..."
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HCI_OUT=$(hcitool scan | grep "${DEVICE_NAME}")
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if [ $? -ne 0 ]; then
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error_message "Can't find ${DEVICE_NAME}. Make sure that the radio is on and in pairing mode."
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exit 1
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fi
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MAC=$(echo ${HCI_OUT} | awk '{print $1}')
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# Update configuration file detected MAC address
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sed -i "s|.*mac.*| \"mac\": \"${MAC}\"|g" ${ACTIVE_RADIO}
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# Generate an expect script to automatically pair our device.
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PAIR_SCRIPT="${HOME}/pair"
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cat <<EOF > ${PAIR_SCRIPT}
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#!/usr/bin/expect -f
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set device "${MAC}"
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set timeout 60
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spawn bluetoothctl
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expect "Agent registered"
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send "power on\r"
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expect "Changing power on succeeded"
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send "scan on\r"
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expect "${MAC}"
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send "pair ${MAC}\r"
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expect "Pairing successful"
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send "trust ${MAC}\r"
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expect "trust succeeded"
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send "exit\r"
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expect eof
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EOF
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sleep 1 && chmod 755 ${PAIR_SCRIPT} && expect ${PAIR_SCRIPT}
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;;
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unpair)
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MAC=$(cat ${ACTIVE_RADIO} | jq -e -r .bluetooth.mac)
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if [ $? -ne 0 ]; then
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error_message "No MAC found in radio configuration file."
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exit 1
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fi
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PAIR_STATUS=$(bluetoothctl info "${MAC}")
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if [ $? -ne 0 ]; then
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error_message "No device with ${MAC} found. Can't unpair."
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exit 1
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fi
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info_message "Unpairing ${DEVICE_NAME}..."
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bluetoothctl untrust ${MAC}
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bluetoothctl remove ${MAC}
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echo -e "${YELLOW}"
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echo -e "You may also want to remove this device from your VR-N76"
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echo -e "under Menu > General Settings > Connection > Paired Devices."
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echo -e "${NC}"
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;;
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connect)
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get_mac_or_exit
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echo -e "${YELLOW}"
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echo -e "1. Turn on the VGC VR-N76"
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echo -e "2. Menu > General Settings > KISS TNC = checked"
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read -p "3. Press [ENTER] when done."
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is_paired=$(bluetoothctl info ${MAC} | grep "Paired" | awk '{print $2}')
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if [ "${is_paired}" != "yes" ]; then
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echo -e "${RED}"
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et-log "VR-N76 is not paired. Run: '$(basename $0) pair'"
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echo -e "${NC}"
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exit 1
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fi
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echo -e "${GREEN}Found VR-N76 with MAC address: ${MAC}"
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stop_all_services
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update_ax25_conf
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echo -e "${BLUE}Connecting to radio..."
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sudo rfcomm connect /dev/rfcomm0 ${MAC} 1>/dev/null 2>&1 &
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sleep 10 && reset
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if [ -e /dev/rfcomm0 ]; then
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echo -e "${GREEN}VR-N76 connected via Bluetooth serial${NC}"
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else
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echo -e "${RED}VR-N76 failed to connect via Bluetooth serial${NC}"
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exit 1
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fi
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echo -e "${BLUE}Connecting KISS interface using ${BT_DEVICE} and AX.25 port: ${AX25_PORT}${NC}"
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KISS_OUT=$(sudo kissattach ${BT_DEVICE} ${AX25_PORT})
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if [ $? -eq 0 ]; then
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echo -e "${GREEN}Packet port ready"
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else
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echo -e "${RED}Failed to setup radio for packet.${NC}"
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exit 1
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fi
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KISS_OUT=$(sudo kissparms -c 1 -p ${AX25_PORT})
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echo -e "${YELLOW}"
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echo -e "SAMPLE COMMANDS DESCRIPTION "
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echo -e "------------------------------- --------------------------------"
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echo -e "axcall ${AX25_PORT} <STATION> Connect directly to a node "
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echo -e "axcall ${AX25_PORT} <DIGI> Connect to node via a digipeater"
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echo -e "sudo axlisten -a -tttt -c Monitor inbound and outbound traffic"
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echo -e "${NC}"
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;;
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*)
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et-log "Invalid command."
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usage
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exit 1
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;;
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esac
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@@ -0,0 +1,15 @@
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{
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"id": "vgc-vrn76",
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"vendor": "VGC",
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"model": "VR-N76 (BT)",
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"bluetooth": {
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"mac": ""
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},
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"notes": [
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"Menu > General Settings > KISS TNC > Enable KISS TNC = checked"
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],
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"fieldNotes": [
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"Power cycle VGC between each Bluetooth operation",
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"If power cycling VGC doesn't help, cycle Bluetooth on laptop"
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]
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}
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