diff --git a/README.org b/README.org
index ffd7248..f00ca91 100644
--- a/README.org
+++ b/README.org
@@ -1,12 +1,6 @@
 * Muraqib
 
-Temperature and humidity sensor that sends its data via MQTT. The project is implemented using a Wemos D1 mini board with the following components:
-
-- DHT22 temperature and humidity sensor
-- Battery shield
-- 3.7V 1000mAh Lithium battery
-
-The sensor captures the data every 5 minutes and sends it to a MQTT broker and then enters deep sleep, it is important to save power as the device runs off a battery. This sensor is part of a project to grow mushrooms in a controlled environment.
+CO2 sensor that collects and sends its data via MQTT to a server. The board of the sensor is the Wemos D1 mini and the sensor is a SCD41.
 
 ** Pinout of the board
 
@@ -14,8 +8,7 @@ The sensor captures the data every 5 minutes and sends it to a MQTT broker and t
 [[./pinout.png]]
 
 ** Dependencies
-- [[https://github.com/adafruit/DHT-sensor-library][Adafruit DHT sensor library]]
-- [[https://github.com/adafruit/Adafruit_Sensor][Adafruit Unified Sensor Driver]]
+- [[https://github.com/Sensirion/arduino-i2c-scd4x][Sensirion I²C SCD4X Arduino Library]]
 - [[https://github.com/knolleary/pubsubclient][PubSubClient]]
 - [[https://github.com/bblanchon/ArduinoJson][ArduinoJSON]]
 ** Configuration
diff --git a/platformio.ini b/platformio.ini
index df3ccbd..12e5591 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -13,8 +13,9 @@ platform = espressif8266
 board = d1_mini
 board_build.filesystem = littlefs
 framework = arduino
+monitor_filters = esp8266_exception_decoder
 lib_deps =
-  adafruit/DHT sensor library@^1.4.6
-  adafruit/Adafruit Unified Sensor@^1.1.15
+  sensirion/Sensirion I2C SCD4x@^1.1.0
   knolleary/PubSubClient@^2.8
   bblanchon/ArduinoJson@^7.4.1
+
diff --git a/src/main.cpp b/src/main.cpp
index 08738e7..70820e7 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,38 +1,64 @@
 #include "config.h"
 #include "wlan.h"
 #include <Arduino.h>
-#include <DHT.h>
+#include <SensirionI2cScd4x.h>
+#include <Wire.h>
 
 #define DHTTYPE DHT22
 #define DHTPIN 4
-DHT dht(DHTPIN, DHTTYPE);
+SensirionI2cScd4x sensor;
+
+int error;
+static char errorMessage[64];
 
 const char *config_file_path = "/config.json";
+long inactivity_delay;
 Config *config;
 WiFiClient wifi_client;
 PubSubClient mqtt_client(wifi_client);
 
-bool check_valid_value(float value) {
-  return (!isnan(value) && value >= 0 && value <= 100);
+int check_error(int error) {
+    if (error) {
+        Serial.println("Error while initializing sensor");
+        errorToString(error, errorMessage, sizeof errorMessage);
+        return 1;
+    }
+    return 0;
 }
 
 void setup() {
-  Serial.begin(9600);
-  dht.begin();
-  config = (Config *)malloc(sizeof(Config));
-  if (!load_config_file(config_file_path, config))
-    Serial.println("ERROR: The config file could not be loaded");
-  connect_wlan(config);
+    Serial.begin(9600);
+    Wire.begin();
+    sensor.begin(Wire, SCD41_I2C_ADDR_62);
+    error = sensor.wakeUp();
+    error = sensor.stopPeriodicMeasurement();
+    error = sensor.reinit();
+    error = sensor.startPeriodicMeasurement();
+    inactivity_delay = 60000;
 }
 
 void loop() {
-  float temperature = dht.readTemperature();
-  float humidity = dht.readHumidity();
-  float data[2] = {temperature, humidity};
-  if (check_valid_value(temperature) && check_valid_value(humidity)) {
-    mqtt_transfer(mqtt_client, config, data);
-  }
-  disconnect_mqtt(mqtt_client, config->topic);
-  free(config);
-  enter_deep_sleep(false, config->sleep_time);
+    uint16_t co2_concentration = 0.0;
+    float temperature = 0.0;
+    float humidity = 0.0;
+    bool data_available = false;
+
+    error = sensor.getDataReadyStatus(data_available);
+    error = sensor.readMeasurement(co2_concentration, temperature, humidity);
+
+    if (data_available) {
+        Serial.print("CO2 concentration [ppm]: ");
+        Serial.print(co2_concentration);
+        Serial.println();
+        Serial.print("Temperature [°C]: ");
+        Serial.print(temperature);
+        Serial.println();
+        Serial.print("Relative Humidity [RH]: ");
+        Serial.print(humidity);
+        Serial.println();
+    } else {
+        Serial.println(".");
+    }
+
+    delay(inactivity_delay);
 }