pi-cec/cec-control.sh

#!/bin/bash

# CEC Control Script for Raspberry Pi 4
# Requires: cec-utils
# Install with: sudo apt-get install cec-utils

CEC_CLIENT="cec-client"

# Check if cec-client is installed
if ! command -v $CEC_CLIENT &> /dev/null; then
    echo "Error: cec-client not found"
    echo "Install with: sudo apt-get install cec-utils"
    exit 1
fi

# Send a CEC command
send_command() {
    echo "$1" | $CEC_CLIENT -s -d 1
}

# Show available commands
show_help() {
    cat << EOF
CEC Control Script for Raspberry Pi 4

Usage: $0 <command> [options]

Commands:
  tv-on                    Turn on the TV
  tv-off                   Turn off the TV
  standby                  Put TV in standby mode
  wake                     Wake TV from standby

  vol-up                   Increase volume
  vol-down                 Decrease volume
  mute                     Mute audio

  input <port>             Switch to HDMI input port (0-15)
  source <device>          Switch to source device (0-15)

  scan                     Scan for CEC devices
  status                   Show CEC adapter status
  info                     Show TV information
  fix                      Troubleshoot connection issues

  raw <command>            Send raw CEC command (hex)

  help                     Show this help message

Examples:
  $0 tv-on
  $0 vol-up
  $0 input 1
  $0 raw 4F:82:10:00

EOF
}

# Command functions
tv_on() {
    echo "Turning TV on..."
    send_command "on 0"
}

tv_off() {
    echo "Turning TV off..."
    send_command "standby 0"
}

standby() {
    echo "Putting TV in standby..."
    send_command "standby 0"
}

wake() {
    echo "Waking TV..."
    send_command "on 0"
}

vol_up() {
    echo "Volume up..."
    send_command "volup"
}

vol_down() {
    echo "Volume down..."
    send_command "voldown"
}

mute() {
    echo "Muting..."
    send_command "mute"
}

input_switch() {
    local port=$1
    if [ -z "$port" ]; then
        echo "Error: Please specify input port (0-15)"
        exit 1
    fi
    echo "Switching to HDMI input $port..."
    send_command "tx 1f:82:$(printf '%x' $port):00"
}

source_switch() {
    local device=$1
    if [ -z "$device" ]; then
        echo "Error: Please specify source device (0-15)"
        exit 1
    fi
    echo "Switching to source device $device..."
    send_command "tx 1f:82:$(printf '%x' $device):00"
}

scan_devices() {
    echo "Scanning for CEC devices..."
    $CEC_CLIENT -s -d 1 < /dev/null
}

show_status() {
    echo "CEC Adapter Status:"
    $CEC_CLIENT -s -d 1 <<<'q'
}

show_info() {
    echo "TV Information:"
    send_command "poll 0"
}

raw_command() {
    local cmd=$1
    if [ -z "$cmd" ]; then
        echo "Error: Please specify raw command"
        exit 1
    fi
    echo "Sending raw command: $cmd"
    send_command "tx $cmd"
}

fix_connection() {
    echo "Attempting to fix CEC connection issues..."
    echo ""

    # Check if running as root
    if [ "$EUID" -ne 0 ]; then
        echo "Checking for existing CEC processes..."
        pgrep -a cec-client || echo "No cec-client processes found"
        echo ""
        echo "Trying with sudo - you may need to enter your password:"
        echo ""
        sudo "$0" "$@"
        exit $?
    fi

    echo "Running as root - checking CEC device status..."
    echo ""

    # Check if device exists
    if [ -e /dev/cec0 ]; then
        echo "CEC device /dev/cec0 exists"
        ls -l /dev/cec0
        echo ""

        # Check what's using the device
        echo "Checking what's using the CEC device:"
        lsof /dev/cec0 2>/dev/null || echo "Nothing is locking /dev/cec0"
        echo ""
    else
        echo "Warning: /dev/cec0 does not exist"
        echo "Available devices:"
        ls -la /dev/cec* /dev/tty* 2>/dev/null | grep -E "cec|ttyAMA|ttyS0" || echo "No CEC devices found"
        echo ""
    fi

    echo "Attempting to scan for devices..."
    echo ""
    $CEC_CLIENT -s -d 1 < /dev/null
}

# Main script logic
case "$1" in
    tv-on)
        tv_on
        ;;
    tv-off)
        tv_off
        ;;
    standby)
        standby
        ;;
    wake)
        wake
        ;;
    vol-up)
        vol_up
        ;;
    vol-down)
        vol_down
        ;;
    mute)
        mute
        ;;
    input)
        input_switch "$2"
        ;;
    source)
        source_switch "$2"
        ;;
    scan)
        scan_devices
        ;;
    status)
        show_status
        ;;
    info)
        show_info
        ;;
    fix)
        fix_connection
        ;;
    raw)
        raw_command "$2"
        ;;
    help|--help|-h|"")
        show_help
        ;;
    *)
        echo "Unknown command: $1"
        echo "Run '$0 help' for usage information"
        exit 1
        ;;
esac