Example Code for Arduino-Read Sensor Raw Value
Last revision 2026/01/22
This project demonstrates how to read the raw analog value from the Fermion: MEMS NO2 Sensor using an Arduino board. Users can learn how to connect the sensor to Arduino and retrieve the analog output value.
Hardware Preparation
- DFRduino UNO R3 (or similar) x 1
- MEMS Gas Sensor x 1
- Jumper wires
Software Preparation
Wiring Diagram

Other Preparation Work
The module needs to be warmed up for more than 5 minutes when powered on for the first time. It is recommended to warm up for more than 24 hours if it has not been used for a long time.
Sample Code
int sensorPin = A0;
int sensorValue = 0;
void setup()
{
Serial.begin(9600); //Set serial baud rate to 9600 bps
}
void loop()
{
sensorValue = analogRead(sensorPin);
Serial.println(sensorValue);
delay(100);
}
Result
Open the serial port monitor and get the original value of the sensor.
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