Sensor Nodes

Pre-configured nodes for popular IoT sensors. Connect your sensor, add the node to your flow, and start receiving data. Each node handles the low-level protocol so you can focus on your application.

27 Sensors

8 Capabilities

3 Protocols

Capabilities:

Temperature

Humidity

Pressure

Air Quality

Motion

Distance

Light

Analog

Jump to:

ds18b20 dht22 bme280 bme680 pir hcsr04 bh1750 tsl2561 ads1x15 mcp3008

ds18b20

Popular

Temperature

Read temperature from DS18B20 digital sensors via 1-Wire protocol.

Range -55°C to +125°C

Accuracy ±0.5°C

Resolution 9-12 bit

Protocol 1-Wire

Wiring

{wire.pin} → 3.3V or 5V

{wire.pin} → Ground

{wire.pin} → GPIO4 (with 4.7kΩ pull-up)

Output Example

{node.details.output}

Multiple DS18B20 sensors can share the same 1-Wire bus. Each has a unique 64-bit address.

dht22

Popular

Temperature Humidity

Read temperature and humidity from DHT22/AM2302 sensors.

Temp Range -40°C to +80°C

Humidity 0-100% RH

Sample Rate 0.5Hz (2s min)

Voltage 3.3V to 5.5V

Wiring

{wire.pin} → 3.3V or 5V

{wire.pin} → Ground

{wire.pin} → Any GPIO pin

Output Example

{node.details.output}

Minimum 2-second interval between readings. The node enforces this automatically.

bme280

Popular

Temperature Humidity Pressure

Environmental sensor for temperature, humidity, and barometric pressure.

Temp -40°C to +85°C

Humidity 0-100% RH

Pressure 300-1100 hPa

Protocol I2C / SPI

Wiring

{wire.pin} → 3.3V

{wire.pin} → Ground

{wire.pin} → GPIO2 (I2C data)

{wire.pin} → GPIO3 (I2C clock)

Output Example

{node.details.output}

Altitude is calculated from pressure. Set sea-level reference for accurate readings.

bme680

Temperature Humidity Pressure Air Quality

Air quality sensor with temperature, humidity, pressure, and gas resistance.

Gas Sensor MOX for VOC

IAQ Range 0-500 index

Protocol I2C / SPI

Burn-in 48 hours

Wiring

{wire.pin} → 3.3V

{wire.pin} → Ground

{wire.pin} → GPIO2 (I2C data)

{wire.pin} → GPIO3 (I2C clock)

Output Example

{node.details.output}

Gas sensor requires 48-hour burn-in. IAQ: 0-50 good, 51-100 moderate, 101-150 unhealthy.

pir

Popular

Motion

Passive infrared motion detection for security and automation.

Range 3-7 meters

Angle 110° cone

Output Digital HIGH/LOW

Warm-up 30-60 seconds

Wiring

{wire.pin} → 5V (some work with 3.3V)

{wire.pin} → Ground

{wire.pin} → Any GPIO pin

Output Example

{node.details.output}

Allow 30-60 second warm-up after power-on. Adjust sensitivity on the module.

hcsr04

Distance

Ultrasonic distance measurement from 2cm to 400cm.

Range 2cm to 400cm

Accuracy ±3mm

Angle 15° measuring

Frequency 40kHz

Wiring

{wire.pin} → 5V

{wire.pin} → Ground

{wire.pin} → Any GPIO pin

{wire.pin} → GPIO (with voltage divider)

Output Example

{node.details.output}

ECHO outputs 5V. Use a voltage divider for 3.3V GPIO. Temperature affects accuracy.

bh1750

Light

Digital ambient light sensor for lux measurement.

Range 1-65535 lux

Resolution 1 lux

Response Human eye curve

Protocol I2C

Wiring

{wire.pin} → 3.3V

{wire.pin} → Ground

{wire.pin} → GPIO2 (I2C data)

{wire.pin} → GPIO3 (I2C clock)

Output Example

{node.details.output}

Lux reference: 0-10 night, 10-50 dim, 50-500 indoor, 500-10000 daylight, 10000+ direct sun.

tsl2561

Light

Light-to-digital converter for precise illuminance sensing.

Range 0.1-40000 lux

Channels IR + Visible

Integration 13.7-402ms

Protocol I2C

Wiring

{wire.pin} → 3.3V

{wire.pin} → Ground

{wire.pin} → GPIO2 (I2C data)

{wire.pin} → GPIO3 (I2C clock)

Output Example

{node.details.output}

Provides separate visible and IR readings. Auto-gain adjusts based on light levels.

ads1x15

Analog

12/16-bit ADC for reading analog sensors and voltages.

Resolution 12-bit / 16-bit

Channels 4 single / 2 diff

PGA Range ±0.256V to ±6.144V

Protocol I2C

Wiring

{wire.pin} → 3.3V or 5V

{wire.pin} → Ground

{wire.pin} → GPIO2 (I2C data)

{wire.pin} → GPIO3 (I2C clock)

Output Example

{node.details.output}

Programmable Gain Amplifier (PGA) allows measuring small signals accurately.

mcp3008

Analog

8-channel 10-bit ADC via SPI for multiple analog inputs.

Resolution 10-bit (0-1023)

Channels 8 single-ended

Sample Rate Up to 200 ksps

Protocol SPI

Wiring

{wire.pin} → 3.3V

{wire.pin} → Ground

{wire.pin} → GPIO11 (SPI clock)

{wire.pin} → GPIO9 (MISO)

{wire.pin} → GPIO10 (MOSI)

{wire.pin} → GPIO8 (CE0)

Output Example

{node.details.output}

Great for potentiometers, photoresistors, thermistors. Requires SPI enabled.

Popular Sensor Combinations

Weather Station

Full environmental monitoring with light sensing

bme280 bh1750 hcsr04

Home Security

Motion detection with proximity and ambient light

pir hcsr04 bh1750

Air Quality Monitor

Indoor air quality with gas detection

bme680 dht22

Greenhouse Controller

Plant environment monitoring with soil sensors

dht22 bh1750 ads1x15

More Sensor Nodes

bmp280

Barometric pressure + temp

sht3x

Temperature + humidity

aht20

Temperature + humidity

veml7700

Ambient light sensor

ccs811

Air quality (eCO2/TVOC)

sgp30

Air quality (eCO2/TVOC)

vl53l0x

ToF distance sensor

vl53l1x

Long-range ToF distance

rcwl0516

Microwave radar motion

gps

GPS/GNSS receiver

ads1x15

12-bit ADC

pcf8591

8-bit ADC + DAC

gps_neom8n

u-blox NEO-M8N GPS

compass_bn880

GPS + compass module

voltage-monitor

Voltage divider monitor

current-monitor

INA219/INA226 current

max31855

K-type thermocouple

max31865

RTD PT100/PT1000

Wiring Tips

I2C Bus Sharing

Most I2C sensors (BME280, BH1750) can share the same bus - just connect them in parallel.

Voltage Levels

Many 5V sensors need level shifters or voltage dividers when connecting to 3.3V GPIO pins.

Sampling Rates

Use the filter node after sensors to smooth noisy readings with moving averages.

Pull-up Resistors

1-Wire and some I2C devices need external pull-up resistors (4.7kΩ for 1-Wire, 2.2kΩ for I2C).

Continue Learning

GPIO & Hardware Direct hardware pin control

Database Nodes Store your sensor data