Sensors

Start Here — Which Sensor?

🌡️ Environment monitoring? BME280. Temp, humidity, pressure in one $3 module. BME280 Hookup →

📏 Distance measurement? VL53L0X (ToF laser, 2m) or HC-SR04 (ultrasonic, 4m).

🧭 Orientation / motion? ICM-20948. 9-axis IMU — accel + gyro + magnetometer. IMU Docs →

Sensor	Measures	Interface	Range	Price
BME280	Temp/Humidity/Pressure	I2C	-40–85°C, 0–100% RH	~$3
DHT22	Temp/Humidity	GPIO	-40–80°C, 0–100% RH	~$4
HC-SR04	Distance (ultrasonic)	GPIO	2–400 cm	~$2
VL53L0X	Distance (ToF laser)	I2C	3–200 cm	~$5
MPU6050	6-axis IMU (accel+gyro)	I2C	±16g, ±2000dps	~$3
ICM-20948	9-axis IMU (accel+gyro+mag)	I2C/SPI	±16g, ±2000dps	~$10
INA219	Current/Power monitor	I2C	0–26V, 0–3.2A	~$3
MQ-2	Combustible gas/smoke	Analog	Various gases	~$2
BH1750	Ambient light (lux)	I2C	1–65535 lux	~$2
DS18B20	Temperature (waterproof)	1-Wire	-55–125°C	~$3

OpenELAB Sensors

• 9-Axis IMU Module — ICM-20948 breakout

Hookup Guides

• BME280 Hookup Guide