How to Use Fermion: MEMS Ammonia NH3 Gas Detection Sensor (Breakout, 1-300ppm): Examples, Pinouts, and Specs

The :Fermion: MEMS Ammonia NH3 Gas Detection Sensor is a high-precision module designed to detect ammonia gas concentrations in the range of 1-300ppm. Utilizing advanced MEMS (Micro-Electro-Mechanical Systems) technology, this sensor offers reliable and accurate measurements, making it ideal for various environmental monitoring applications. Common use cases include air quality monitoring, industrial safety, and agricultural applications.

1. Power Supply: Connect the VCC pin to a 3.3V or 5V power supply and the GND pin to the ground.
2. Analog Output: Connect the AOUT pin to an analog input pin on your microcontroller to read the ammonia concentration.
3. Digital Output: Connect the DOUT pin to a digital input pin on your microcontroller to detect if the ammonia concentration exceeds a predefined threshold.

• Calibration: Allow the sensor to warm up for at least 24 hours before taking accurate measurements.
• Placement: Place the sensor in an area with good airflow to ensure accurate readings.
• Power Supply: Ensure a stable power supply to avoid fluctuations in sensor readings.
• Humidity and Temperature: Operate the sensor within the specified humidity and temperature ranges to maintain accuracy.

// Include necessary libraries
const int analogPin = A0; // Analog input pin connected to AOUT
const int digitalPin = 2; // Digital input pin connected to DOUT

void setup() {
  Serial.begin(9600); // Initialize serial communication at 9600 baud
  pinMode(digitalPin, INPUT); // Set digital pin as input
}

void loop() {
  int analogValue = analogRead(analogPin); // Read the analog value
  int digitalValue = digitalRead(digitalPin); // Read the digital value

  // Convert the analog value to a voltage
  float voltage = analogValue * (5.0 / 1023.0);

  // Print the analog value and voltage to the serial monitor
  Serial.print("Analog Value: ");
  Serial.print(analogValue);
  Serial.print(" - Voltage: ");
  Serial.print(voltage);
  Serial.println("V");

  // Check if the digital output is high
  if (digitalValue == HIGH) {
    Serial.println("Ammonia concentration exceeds threshold!");
  } else {
    Serial.println("Ammonia concentration is below threshold.");
  }

  delay(1000); // Wait for 1 second before the next reading
}

1. Inaccurate Readings: Ensure the sensor has been calibrated and has had sufficient warm-up time.
2. No Output Signal: Check the power supply connections and ensure the sensor is receiving the correct voltage.
3. Fluctuating Readings: Verify that the power supply is stable and that the sensor is placed in an area with consistent airflow.

• Calibration: Allow the sensor to warm up for at least 24 hours before taking accurate measurements.
• Stable Power Supply: Use a regulated power supply to avoid fluctuations in sensor readings.
• Environmental Factors: Ensure the sensor is operated within the specified temperature and humidity ranges.

By following this documentation, users can effectively integrate the :Fermion: MEMS Ammonia NH3 Gas Detection Sensor into their projects, ensuring accurate and reliable ammonia gas detection.