Monitor Jetson Orin Nano Temperature in Real-Time with a Bash Script

To monitor Jetson Orin Nano temperatures in a clean vertical format, create a Bash script that reads and parses the built-in tegrastats output.

First, create a script file:

nano jetson-temp-monitor.sh

Paste the following:

#!/bin/bash

# Trap Ctrl+C to show cursor again and exit cleanly
trap "tput cnorm; exit" INT

# Hide the cursor for cleaner output
tput civis

# Start tegrastats and process its output line by line
tegrastats | while read -r line; do
    clear  # Clear the terminal screen on each update

    # Extract temperature values using grep and Perl-compatible regex (-oP)
    cpu_temp=$(echo "$line" | grep -oP 'cpu@\K[0-9.]+C')
    gpu_temp=$(echo "$line" | grep -oP 'gpu@\K[0-9.]+C')
    soc0_temp=$(echo "$line" | grep -oP 'soc0@\K[0-9.]+C')
    soc1_temp=$(echo "$line" | grep -oP 'soc1@\K[0-9.]+C')
    soc2_temp=$(echo "$line" | grep -oP 'soc2@\K[0-9.]+C')
    tj_temp=$(echo "$line" | grep -oP 'tj@\K[0-9.]+C')

    # Print the temperatures in a vertical format
    echo "Jetson Orin Nano Temperature Monitor"
    echo "------------------------------------"
    echo "CPU Temp  : ${cpu_temp:-N/A}"
    echo "GPU Temp  : ${gpu_temp:-N/A}"
    echo "SoC0 Temp : ${soc0_temp:-N/A}"
    echo "SoC1 Temp : ${soc1_temp:-N/A}"
    echo "SoC2 Temp : ${soc2_temp:-N/A}"
    echo "Tj Temp   : ${tj_temp:-N/A}"
    echo ""
    echo "Press Ctrl+C to stop."

done

Save and exit. Then make it executable:

chmod +x jetson-temp-monitor.sh

Now just run it:

./jetson-temp-monitor.sh

It will display real-time temperature updates vertically. Press Ctrl+C to stop.

Update on the Script

This version includes more information about the system.

#!/bin/bash

# === Cleanup on exit ===
cleanup() {
    tput cnorm         # Show cursor
    stty echo          # Re-enable terminal echo
    clear              # Optional: clear screen
    exit
}

# Trap all common termination signals
trap cleanup INT TERM EXIT

# Hide cursor and disable terminal echo
tput civis
stty -echo

# Clear screen initially
clear

# Main loop from tegrastats
tegrastats | while read -r line; do
    tput cup 0 0  # Move cursor to top-left

    # Extract temperatures
    cpu_temp=$(echo "$line" | grep -oP 'cpu@\K[0-9.]+C')
    gpu_temp=$(echo "$line" | grep -oP 'gpu@\K[0-9.]+C')
    soc0_temp=$(echo "$line" | grep -oP 'soc0@\K[0-9.]+C')
    soc1_temp=$(echo "$line" | grep -oP 'soc1@\K[0-9.]+C')
    soc2_temp=$(echo "$line" | grep -oP 'soc2@\K[0-9.]+C')
    tj_temp=$(echo "$line" | grep -oP 'tj@\K[0-9.]+C')

    # Extract GPU usage
    gpu_usage=$(echo "$line" | grep -oP 'GR3D_FREQ \K[0-9]+%')

    # Extract per-core CPU usage
    cpu_raw=$(echo "$line" | grep -oP 'CPU\s*\[\K[^\]]+')
    if [ -n "$cpu_raw" ]; then
        cpu_usage_formatted=$(echo "$cpu_raw" | tr ',' '\n' | sed 's/@.*//' | paste -sd' | ' -)
    else
        cpu_usage_formatted="N/A"
    fi

    # Extract RAM usage
    ram_usage=$(echo "$line" | grep -oP 'RAM \K[0-9]+/[0-9]+MB')

    # Extract SWAP usage like "225/16384MB"
    swap_usage=$(echo "$line" | grep -oP 'SWAP \K[0-9]+/[0-9]+MB')

    # Display
    echo "Jetson Orin Nano Monitor"
    echo "-------------------------"
    #echo "RAM Usage  : ${ram_usage:-N/A}        "
    echo "CPU Temp   : ${cpu_temp:-N/A}         "
    echo "GPU Temp   : ${gpu_temp:-N/A}         "
    echo "SoC0 Temp  : ${soc0_temp:-N/A}        "
    echo "SoC1 Temp  : ${soc1_temp:-N/A}        "
    echo "SoC2 Temp  : ${soc2_temp:-N/A}        "
    echo "Tj Temp    : ${tj_temp:-N/A}          "
    echo ""
    echo "CPU Usage  : ${cpu_usage_formatted}   "
    echo "GPU Usage  : ${gpu_usage:-N/A}        "
    echo "RAM Usage  : ${ram_usage:-N/A}        "
    echo "SWAP Usage : ${swap_usage:-N/A}        "
    echo ""
    echo "Press Ctrl+C to stop.                 "
done

Output Result

Jetson Orin Nano Monitor
-------------------------
CPU Temp   : 63.687C
GPU Temp   : 64.375C
SoC0 Temp  : 62.218C
SoC1 Temp  : 62.75C
SoC2 Temp  : 62C
Tj Temp    : 64.375C

CPU Usage  : 4% 1%|3% 30% 1%|43%
GPU Usage  : 41%
RAM Usage  : 5202/7620MB
SWAP Usage : 217/16384MB

Press Ctrl+C to stop.