Initial commit: Add CEC control script for Raspberry Pi 4

- Add cec-control.sh with power, volume, and input commands
- Add README with installation and usage instructions

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitignore

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+# Backup files
+*.bak
+*~
+
+# Editor files
+*.swp
+*.swo
+.*.swp
+.*.swo
+.vscode/
+.idea/
+
+# OS files
+.DS_Store
+Thumbs.db

README.md

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+# CEC Control for Raspberry Pi 4
+
+Control HDMI-connected devices (TVs, receivers, etc.) from your Raspberry Pi 4 using CEC (Consumer Electronics Control).
+
+## Installation
+
+1. Install the required CEC library:
+```bash
+sudo apt-get update
+sudo apt-get install libcec-rpi
+```
+
+2. Make the script executable (already done):
+```bash
+chmod +x cec-control.sh
+```
+
+## Usage
+
+```bash
+./cec-control.sh <command> [options]
+```
+
+## Available Commands
+
+| Command | Description | Example |
+|---------|-------------|---------|
+| `tv-on` | Turn on the TV | `./cec-control.sh tv-on` |
+| `tv-off` | Turn off the TV | `./cec-control.sh tv-off` |
+| `standby` | Put TV in standby | `./cec-control.sh standby` |
+| `wake` | Wake TV from standby | `./cec-control.sh wake` |
+| `vol-up` | Increase volume | `./cec-control.sh vol-up` |
+| `vol-down` | Decrease volume | `./cec-control.sh vol-down` |
+| `mute` | Mute audio | `./cec-control.sh mute` |
+| `input <port>` | Switch HDMI input (0-15) | `./cec-control.sh input 1` |
+| `source <device>` | Switch source device (0-15) | `./cec-control.sh source 2` |
+| `scan` | Scan for CEC devices | `./cec-control.sh scan` |
+| `status` | Show CEC adapter status | `./cec-control.sh status` |
+| `info` | Show TV information | `./cec-control.sh info` |
+| `raw <command>` | Send raw CEC command | `./cec-control.sh raw 4f:82:10:00` |
+| `help` | Show help message | `./cec-control.sh help` |
+
+## Quick Start
+
+1. Connect your Raspberry Pi to your TV via HDMI
+2. Enable CEC on your TV (usually in settings)
+3. Test the connection:
+```bash
+./cec-control.sh scan
+```
+4. Turn on your TV:
+```bash
+./cec-control.sh tv-on
+```
+
+## Troubleshooting
+
+- **CEC not working**: Make sure CEC is enabled in your TV settings
+- **Permission denied**: Run with `sudo` if needed
+- **Device not found**: Check HDMI connection and try rescanning with `scan` command
+
+## Advanced Usage
+
+You can integrate this script into your own automation:
+```bash
+# Turn on TV and switch to input 1
+./cec-control.sh tv-on && sleep 2 && ./cec-control.sh input 1
+
+# Use in cron jobs or other scripts
+@reboot /path/to/cec-control.sh tv-on
+```

cec-control.sh

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+#!/bin/bash
+
+# CEC Control Script for Raspberry Pi 4
+# Requires: libcec (cec-client)
+# Install with: sudo apt-get install libcec-rpi
+
+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 libcec-rpi"
+    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
+
+  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"
+}
+
+# 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
+        ;;
+    raw)
+        raw_command "$2"
+        ;;
+    help|--help|-h|"")
+        show_help
+        ;;
+    *)
+        echo "Unknown command: $1"
+        echo "Run '$0 help' for usage information"
+        exit 1
+        ;;
+esac

claude.md

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+Create a script to send cec commands over the hdmi port of a raspberry pi 4