diff --git a/platformio.ini b/platformio.ini
index 766129f..4562647 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -10,6 +10,7 @@
 [env:esp12e]
 platform = espressif8266
 board = esp12e
+board_build.filesystem = littlefs
 framework = arduino
 lib_deps = 
     adafruit/Adafruit MAX31855 library
@@ -18,3 +19,4 @@ lib_deps =
     ESPAsyncTCP
     zeed/ESP Async WebServer
     Arduino_JSON
+monitor_filters = esp8266_exception_decoder, colorize
diff --git a/src/main.cpp b/src/main.cpp
index 57ca825..0fc3473 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3,6 +3,7 @@
 #include <Arduino_JSON.h>
 #include <ESP8266WiFi.h>
 #include <ESPAsyncWebServer.h>
+#include <LittleFS.h>
 #include <SPI.h>
 #include <pinout.h>
 
@@ -18,42 +19,25 @@ JSONVar readings;
 
 unsigned long int lastTime = 0;
 unsigned long int timerDelay = 3000;
-
-String getSensorReadings() {
-    if (isnan(thermocoupleA.readCelsius()) | isnan(thermocoupleB.readCelsius())) {
-        uint8_t eA = thermocoupleA.readError();
-        uint8_t eB = thermocoupleB.readError();
-        if (eA & MAX31855_FAULT_OPEN) {
-            Serial.println("FAULT: thermocouple A open");
-            readings["tempA"] = "FAULT: thermocouple A open";
+String checkSensor(Adafruit_MAX31855 &sensor) {
+    if (isnan(sensor.readCelsius())) {
+        uint8_t err = sensor.readError();
+        if (err & MAX31855_FAULT_OPEN) {
+            return "FAULT: thermocouple open";
         }
-        if (eA & MAX31855_FAULT_SHORT_GND) {
-            Serial.println("FAULT: thermocouple A short to GND");
-            readings["tempA"] = "FAULT: thermocouple A short to GND";
-            }
-        if (eA & MAX31855_FAULT_SHORT_VCC) {
-            Serial.println("FAULT: thermocouple A short to VCC");
-            readings["tempA"] = "FAULT: thermocouple A short to VCC";
+        if (err & MAX31855_FAULT_SHORT_GND) {
+            return "FAULT: thermocouple short to GND";
         }
-        if (eB & MAX31855_FAULT_OPEN) {
-            Serial.println("FAULT: thermocouple B open");
-            readings["tempB"] = "FAULT: thermocouple B open";
+        if (err & MAX31855_FAULT_SHORT_VCC) {
+            return "FAULT: thermocouple short to VCC";
         }
-        if (eB & MAX31855_FAULT_SHORT_GND) {
-            Serial.println("FAULT: thermocouple B short to GND");
-            readings["tempB"] = "FAULT: thermocouple B short to GND";
-            }
-        if (eB & MAX31855_FAULT_SHORT_VCC) {
-            Serial.println("FAULT: thermocouple B short to VCC");
-            readings["tempB"] = "FAULT: thermocouple B short to VCC";
-        }
-    } else {
-        double tempA = thermocoupleA.readCelsius();
-        double tempB = thermocoupleB.readCelsius();
-        readings["tempA"] = String(tempA) + "°C";
-        readings["tempB"] = String(tempB) + "°C";
-        readings["time"] = String(lastTime);
     }
+    return String(sensor.readCelsius()) + "°C";
+}
+String getSensorReadings() {
+    readings["tempA"] = checkSensor(thermocoupleA);
+    readings["tempB"] = checkSensor(thermocoupleB);
+    readings["time"] = String(lastTime);
     String jsonString = JSON.stringify(readings);
     return jsonString;
 }
@@ -63,51 +47,49 @@ void notifyClients(String sensorReadings) {
 }
 
 void handleWebSocketMessage(void *arg, uint8_t *data, size_t len) {
-  AwsFrameInfo *info = (AwsFrameInfo*)arg;
-  if (info->final && info->index == 0 && info->len == len && info->opcode == WS_TEXT) {
-    //data[len] = 0;
-    //String message = (char*)data;
-    // Check if the message is "getReadings"
-    //if (strcmp((char*)data, "getReadings") == 0) {
-      //if it is, send current sensor readings
-      String sensorReadings = getSensorReadings();
-      Serial.print(sensorReadings);
-      notifyClients(sensorReadings);
-    //}
-  }
+    AwsFrameInfo *info = (AwsFrameInfo *)arg;
+    if (info->final && info->index == 0 && info->len == len && info->opcode == WS_TEXT) {
+        // data[len] = 0;
+        // String message = (char*)data;
+        //  Check if the message is "getReadings"
+        // if (strcmp((char*)data, "getReadings") == 0) {
+        // if it is, send current sensor readings
+        String sensorReadings = getSensorReadings();
+        Serial.print(sensorReadings);
+        notifyClients(sensorReadings);
+        //}
+    }
 }
 
 void onEvent(AsyncWebSocket *server, AsyncWebSocketClient *client, AwsEventType type, void *arg, uint8_t *data, size_t len) {
-  switch (type) {
-    case WS_EVT_CONNECT:
-      Serial.printf("WebSocket client #%u connected from %s\n", client->id(), client->remoteIP().toString().c_str());
-      break;
-    case WS_EVT_DISCONNECT:
-      Serial.printf("WebSocket client #%u disconnected\n", client->id());
-      break;
-    case WS_EVT_DATA:
-      handleWebSocketMessage(arg, data, len);
-      break;
-    case WS_EVT_PONG:
-    case WS_EVT_ERROR:
-      break;
-  }
+    switch (type) {
+        case WS_EVT_CONNECT:
+            Serial.printf("WebSocket client #%u connected from %s\n", client->id(), client->remoteIP().toString().c_str());
+            break;
+        case WS_EVT_DISCONNECT:
+            Serial.printf("WebSocket client #%u disconnected\n", client->id());
+            break;
+        case WS_EVT_DATA:
+            handleWebSocketMessage(arg, data, len);
+            break;
+        case WS_EVT_PONG:
+        case WS_EVT_ERROR:
+            break;
+    }
 }
 
 void initWebSocket() {
-  ws.onEvent(onEvent);
-  server.addHandler(&ws);
+    ws.onEvent(onEvent);
+    server.addHandler(&ws);
 }
 
 void setup() {
     Serial.begin(9600);
     while (!Serial) delay(1);
-    delay(5000); // prevent garbage on serial output
+    delay(5000);  // prevent garbage on serial output
     Serial.println("serial init");
-    if(!SPIFFS.begin()) {
-        delay(500);
-    }
-    Serial.printf("SPIFFS init\n");
+    LittleFS.begin();
+    Serial.printf("LittleFS init\n");
     SPI.begin();
     Serial.println("SPI init");
     Serial.println("MAX31855 test");
@@ -132,17 +114,16 @@ void setup() {
     initWebSocket();
 
     server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
-        request->send(SPIFFS, "/index.html", "text/html");
+        request->send(LittleFS, "/index.html", "text/html");
     });
 
     server.onNotFound([](AsyncWebServerRequest *request) {
         request->send(404, "text/plain", "404 Not Found");
     });
 
-    server.serveStatic("/", SPIFFS, "/");
+    server.serveStatic("/", LittleFS, "/");
     server.begin();
     Serial.printf("webserver init\n");
-    
 }
 
 void loop() {