ESP32 AGS10 Volatile Organic Compound (VOC) Sensor

The AGS10 is a gas sensor known for detecting a range of gases, including methane, propane, and hydrogen. Designed with stability and sensitivity, it’s suitable for industrial safety and environmental monitoring. The sensor offers a rapid response time, high sensitivity, and low power consumption, often used in applications like leak detection and air quality monitoring systems.

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AGS10 Sensor Technical Sepcifications

• Interface: I2C
• Measuring range: 0～99999 ppb
• Accuracy: 25% reading
• Operating Range: 0～50 ℃, 0～95%RH
• Voltage: 3.0 ± 0.1V DC

AGS10 Sensor Pinout

AGS10 Wiring with ESP32

ESP32 AGS10 Arduino IDE Code Example

#include <Wire.h>

#define I2C_ADDRESS 0xXX  // Replace with the AGS10 I2C address
#define SDA_PIN 21        // I2C SDA pin for ESP32
#define SCL_PIN 22        // I2C SCL pin for ESP32

void setup() {
  Wire.begin(SDA_PIN, SCL_PIN);
  Serial.begin(115200);
  Serial.println("AGS10 I2C Test");
}

void loop() {
  Wire.beginTransmission(I2C_ADDRESS);
  Wire.write(0x00);  // Example register or command
  Wire.endTransmission();

  Wire.requestFrom(I2C_ADDRESS, 2);
  if (Wire.available() == 2) {
    int highByte = Wire.read();
    int lowByte = Wire.read();
    int sensorValue = (highByte << 8) | lowByte;

    Serial.print("Sensor Value: ");
    Serial.println(sensorValue);
  }
  delay(1000);
}

ESP32 AGS10 ESP-IDF Code Example

#include <stdio.h>
#include "driver/i2c.h"

#define I2C_MASTER_SCL_IO 22  // GPIO for SCL
#define I2C_MASTER_SDA_IO 21  // GPIO for SDA
#define I2C_MASTER_NUM I2C_NUM_1
#define I2C_MASTER_FREQ_HZ 100000

void app_main() {
  i2c_config_t conf;
  conf.mode = I2C_MODE_MASTER;
  conf.sda_io_num = I2C_MASTER_SDA_IO;
  conf.scl_io_num = I2C_MASTER_SCL_IO;
  conf.sda_pullup_en = GPIO_PULLUP_ENABLE;
  conf.scl_pullup_en = GPIO_PULLUP_ENABLE;
  conf.master.clk_speed = I2C_MASTER_FREQ_HZ;
  i2c_param_config(I2C_MASTER_NUM, &conf);
  i2c_driver_install(I2C_MASTER_NUM, conf.mode, 0, 0, 0);

  // Add code to read from AGS10 via I2C
}

ESP32 AGS10 ESPHome Code Example

sensor:
  - platform: ags10
    tvoc:
      name: TVOC

ESP32 AGS10 PlatformIO Code Example

Configure platformio.ini

[env:esp32]
platform = espressif32
board = esp32dev
framework = espidf
monitor_speed = 115200

ESP32 AGS10 PlatformIO Example Code

#include <Wire.h>

#define I2C_ADDRESS 0xXX  // Replace with the AGS10 I2C address
#define SDA_PIN 21        // I2C SDA pin for ESP32
#define SCL_PIN 22        // I2C SCL pin for ESP32

void setup() {
  Wire.begin(SDA_PIN, SCL_PIN);
  Serial.begin(115200);
  Serial.println("AGS10 I2C Test");
}

void loop() {
  Wire.beginTransmission(I2C_ADDRESS);
  Wire.write(0x00);  // Example register or command
  Wire.endTransmission();

  Wire.requestFrom(I2C_ADDRESS, 2);
  if (Wire.available() == 2) {
    int highByte = Wire.read();
    int lowByte = Wire.read();
    int sensorValue = (highByte << 8) | lowByte;

    Serial.print("Sensor Value: ");
    Serial.println(sensorValue);
  }
  delay(1000);
}

Conclusion

We went through technical specifications of AGS10 Volatile Organic Compound (VOC) Sensor, its pinout, connection with ESP32 and AGS10 Volatile Organic Compound (VOC) Sensor code examples with Arduino IDE, ESP-IDF, ESPHome and PlatformIO.