Thermal IR Infrared Sensor (MG8833)

The AMG8833 (often sold as Grid-EYE) is an 8×8 infrared (IR) thermal imaging sensor that outputs temperature readings from a grid of 64 thermal pixels. It’s popular for hobbyist thermal imaging projects because it’s affordable and easy to interface with microcontrollers and single-board computers.

📌 Key Specifications

• Sensor type: 8×8 pixel IR thermal array

• Temperature measurement range: ~ 0°C to 80°C (32°F to 176°F)
  Note: Some modules can detect slightly broader ranges depending on calibration and environment.

• Interface: I²C (uses SDA/SCL lines for data communication)

• Supply voltage: 3.3 V – 5 V

• Maximum frame rate: 10 Hz (10 readings per second)

• Pixel resolution: 64 thermal pixels

• Typical use: People/heat detection, simple thermal mapping, proximity sensing

🛠️ How It Works

The sensor detects infrared energy (heat) across its 8×8 grid. Each pixel reports an estimated temperature value, creating a low-resolution heat map of the scene in front of the sensor.

You won’t get a camera-like image — think of it more like a low-resolution heat detector where each “pixel” is a temperature reading.

🧠 Typical Platforms & Usage

✔️ Raspberry Pi

• Connect via the I²C pins (SDA, SCL, GND, Vcc)

• Use Python libraries such as adafruit_amg88xx or pimoroni_bme680 compatible drivers

• Commonly paired with libraries like Matplotlib to visualize the thermal data as a colored heat map

✔️ Arduino

• Works with standard Arduino boards using I²C (A4/A5 on Uno, etc.)

• Often combined with Adafruit’s AMG88xx library

• You can print temperature grids to the Serial Monitor or send to a display

📊 Common Example Outputs

• Heat maps showing relative temperatures (hotter areas in red/yellow, cooler in blue)

• Temperature grids (8×8 values)

• Simple object detection based on temperature thresholds (e.g., human detection)

📌 Pros & Limitations

👍 Pros

• Affordable thermal sensor

• Easy to connect via I²C

• Works on 3.3 V and 5 V systems

• Reasonable update rate for hobby projects

👎 Limitations

• Low resolution (8×8) — no detailed thermal images

• Max 10 Hz frame rate

• Accuracy can vary depending on calibration and environment

🧩 Pinout Summary