A Zsh function to display live system information for a Raspberry Pi 3B+

.zsh_aliases

# Start of this file that gets sourced from .zshrc
#
pinfo() {
    # Color Codes for a beautiful output
    C_DEFAULT="\e[0m"
    C_BOLD="\e[1m"
    C_RED="\e[31m"
    C_GREEN="\e[32m"
    C_YELLOW="\e[33m"
    C_BLUE="\e[34m"
    C_MAGENTA="\e[35m"
    C_CYAN="\e[36m"
    C_LIGHT_GRAY="\e[37m"

    # Emojis for fun and clarity
    E_TEMP="🌡️"
    E_CLOCK="⚡"
    E_RAM="💾"
    E_VOLT="💡"
    E_STORAGE="📦"
    E_UPTIME="🕒"
    E_NETWORK="🌐"
    E_THROTTLE="⚠️"
    E_PI="🍓"

    # --- Data Collection ---

    # CPU Temperature (in Celsius)
    # Reads the raw value from the thermal zone file and divides by 1000.
    cpu_temp_raw=$(cat /sys/class/thermal/thermal_zone0/temp)
    cpu_temp_c=$(printf "%.1f" $(($cpu_temp_raw/1000)))

    # GPU Temperature (in Celsius)
    # Uses the vcgencmd utility, specific to Raspberry Pi firmware.
    gpu_temp_c=$(vcgencmd measure_temp | egrep -o '[0-9]*\.[0-9]*')

    # CPU Clock Speed (Current, Min, Max in MHz)
    # Reads from the CPU frequency scaling driver files.
    cpu_speed_cur=$(($(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq)/1000))
    cpu_speed_min=$(($(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq)/1000))
    cpu_speed_max=$(($(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq)/1000))

    # Core Voltage
    # vcgencmd provides the core voltage for CPU/GPU.
    core_volt=$(vcgencmd measure_volts core | cut -d "=" -f2)

    # Memory Usage (RAM)
    # Uses 'free' command and pipes to 'awk' for easy parsing.
    ram_info=$(free -m | awk 'NR==2{printf "Used: %s MB (%.2f%%) / Total: %s MB", $3, $3*100/$2, $2 }')

    # SD Card Storage Usage
    # Uses 'df' (disk free) for the root partition.
    disk_info=$(df -h / | awk 'NR==2{printf "Used: %s (%s) / Total: %s", $3, $5, $2}')

    # System Uptime
    # The 'uptime' command provides this directly.
    sys_uptime=$(uptime -p)

    # Network Information (IP Address)
    # Gets the primary IP address.
    ip_addr=$(hostname -I | cut -d' ' -f1)

    # Throttling Status
    # This is crucial for Pi health. It indicates under-voltage or overheating.
    throttled_raw=$(vcgencmd get_throttled)
    throttled_code=${throttled_raw#*=}

    # Decode the throttling status code. A value of '0x0' is good.
    if [[ "$throttled_code" != "0x0" ]]; then
        throttled_status="${C_RED}${C_BOLD}YES! Check power/cooling.${C_DEFAULT} (Code: $throttled_code)"
    else
        throttled_status="${C_GREEN}No${C_DEFAULT}"
    fi


    # --- Output Display ---

    # Get terminal width for dynamic line drawing
    term_width=$(tput cols)
    line=""
    for ((i=1; i<=$term_width; i++)); do
        line="${line}─"
    done

    # Header
    printf "\n${C_BOLD}${C_MAGENTA}"
    echo "  .~~.   .~~.  $E_PI Raspberry Pi 3B+ Live System Info"
    echo " '. \\ ' ' / .' "
    printf "${C_DEFAULT}"
    printf "${C_LIGHT_GRAY}%s${C_DEFAULT}\n" "$line"


    # System Stats
    printf " ${E_TEMP} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} CPU: ${C_CYAN}%s°C${C_DEFAULT}  |  GPU: ${C_CYAN}%s°C${C_DEFAULT}\n" "Temperature" "$cpu_temp_c" "$gpu_temp_c"
    printf " ${E_CLOCK} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} Current: ${C_CYAN}%s MHz${C_DEFAULT} (Min: %s MHz, Max: %s MHz)\n" "CPU Clock" "$cpu_speed_cur" "$cpu_speed_min" "$cpu_speed_max"
    printf " ${E_VOLT} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} ${C_CYAN}%s${C_DEFAULT}\n" "Core Voltage" "$core_volt"
    printf " ${E_RAM} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} ${C_CYAN}%s${C_DEFAULT}\n" "Memory (RAM)" "$ram_info"
    printf " ${E_STORAGE} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} ${C_CYAN}%s${C_DEFAULT}\n" "SD Card Storage" "$disk_info"
    printf " ${E_UPTIME} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} ${C_CYAN}%s${C_DEFAULT}\n" "Uptime" "${sys_uptime/up /}"
    printf " ${E_NETWORK} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} ${C_CYAN}%s${C_DEFAULT}\n" "IP Address" "$ip_addr"
    printf " ${E_THROTTLE} ${C_BOLD}${C_YELLOW}%-18s${C_DEFAULT} ${throttled_status}\n" "Throttled"

    # Footer
    printf "${C_LIGHT_GRAY}%s${C_DEFAULT}\n\n" "$line"

}

# Rest of your file below should be as normal, if you have something already there