diff --git a/WeatherStation.ino b/WeatherStation.ino
index 3ae4ad3..a314ddf 100644
--- a/WeatherStation.ino
+++ b/WeatherStation.ino
@@ -28,10 +28,9 @@
 void setup()
 {
   Serial.begin( 9600 );
-  Serial.println("Start");
 
   if (Usb.Init() == -1)
-      Serial.println("OSC did not start.");
+      Serial.println("{\"error\":\"OSC did not start.\"}");
       
   delay( 200 );
 
@@ -45,8 +44,9 @@
     if ((Usb.getUsbTaskState() == USB_STATE_RUNNING) && parser.startDelay && (parser.startDelay <= millis())) {
       int rcode = Hid.SetReport(0, 0, 0x02, 0x01, sizeof(parser.report), parser.report);
       if (rcode != 0) {
-        Serial.print("Rcode = ");
-        Serial.println(rcode, HEX);
+        Serial.print("{\"error\":\"Rcode = ");
+        Serial.print(rcode, HEX);
+        Serial.println("\"}");
       }
       parser.startDelay = 0;
     }
diff --git a/hidwh1080rptparser.cpp b/hidwh1080rptparser.cpp
index d87ec50..6a35644 100644
--- a/hidwh1080rptparser.cpp
+++ b/hidwh1080rptparser.cpp
@@ -17,31 +17,33 @@
     } else {
       if (memcmp(chunk, lastChunk, WH1080_BUFFER_CHUNK) != 0) {
         memcpy(lastChunk, chunk, WH1080_BUFFER_CHUNK);
-        Serial.print("Time since last change: ");
-        Serial.println(millis() - lastMillis);
+        //Serial.print("Time since last change: ");
+        Serial.print("{\"period\":");
+        Serial.print(millis() - lastMillis);
         lastMillis = millis();
-        Serial.print("Delay: ");
-        Serial.println(chunk[0]);
-        Serial.print("Indoor humidity: ");
-        Serial.println(chunk[1]);
-        Serial.print("Indoor temperature: ");
-        Serial.println((((chunk[3] & 0x7f) << 8) + chunk[2]) * ((chunk[3] & 0x80) ? -0.1 : 0.1));
-        Serial.print("Outdoor humidity: ");
-        Serial.println(chunk[4]);
-        Serial.print("Outdoor temperature: ");
-        Serial.println((((chunk[6] & 0x7f) << 8) + chunk[5]) * ((chunk[6] & 0x80) ? -0.1 : 0.1));
-        Serial.print("Absolute pressure: ");
-        Serial.println(((chunk[8] << 8) + chunk[7]) * 0.1);
-        Serial.print("Average wind speed: ");
-        Serial.println((chunk[9] + ((chunk[11] & 0x0f) << 8)) * 0.1);
-        Serial.print("Gust wind speed: ");
-        Serial.println((chunk[10] + ((chunk[11] & 0xf0) << 4)) * 0.1);
-        Serial.print("Wind direction: ");
-        Serial.println(chunk[12] * 22.5);
-        Serial.print("Total rain: ");
-        Serial.println(((chunk[14] << 8) + chunk[13]) * 0.3);
-        Serial.print("Status: ");
-        Serial.println(chunk[15], HEX);
+        Serial.print(",\"delay\":");
+        Serial.print(chunk[WH1080_DELAY]);
+        Serial.print(",\"in_humidity\":");
+        Serial.print(chunk[WH1080_HUMIDITY_IN]);
+        Serial.print(",\"in_temp\":");
+        Serial.print((((chunk[WH1080_TEMPERATURE_IN+1] & 0x7f) << 8) + chunk[WH1080_TEMPERATURE_IN]) * ((chunk[WH1080_TEMPERATURE_IN+1] & 0x80) ? -0.1 : 0.1));
+        Serial.print(",\"out_humidity\":");
+        Serial.print(chunk[WH1080_HUMIDITY_OUT]);
+        Serial.print(",\"out_temp\":");
+        Serial.print((((chunk[WH1080_TEMPERATURE_OUT+1] & 0x7f) << 8) + chunk[WH1080_TEMPERATURE_OUT]) * ((chunk[WH1080_TEMPERATURE_OUT+1] & 0x80) ? -0.1 : 0.1));
+        Serial.print(",\"pressure\":");
+        Serial.print(((chunk[WH1080_ABS_PRESSURE+1] << 8) + chunk[WH1080_ABS_PRESSURE]) * 0.1);
+        Serial.print(",\"wind_speed\":");
+        Serial.print((chunk[WH1080_WIND_AVE] + ((chunk[WH1080_WIND_GUST+1] & 0x0f) << 8)) * 0.1);
+        Serial.print(",\"wind_gust\":");
+        Serial.print((chunk[WH1080_WIND_GUST] + ((chunk[WH1080_WIND_GUST+1] & 0xf0) << 4)) * 0.1);
+        Serial.print(",\"wind_dir\":");
+        Serial.print(chunk[WH1080_WIND_DIR] * 22.5);
+        Serial.print(",\"rain\":");
+        Serial.print(((chunk[WH1080_RAIN+1] << 8) + chunk[WH1080_RAIN]) * 0.3); // TODO: check overflow bit
+        Serial.print(",\"status\":");
+        Serial.print(chunk[WH1080_STATUS], HEX);
+        Serial.println("}");
       }
       readingBlockZero = true;
       report[1] = 0;
diff --git a/hidwh1080rptparser.h b/hidwh1080rptparser.h
index 4732cba..4618f65 100644
--- a/hidwh1080rptparser.h
+++ b/hidwh1080rptparser.h
@@ -49,7 +49,7 @@
 #define WH1080_DATA_COUNT           27  // Position of data_count parameter
 #define WH1080_CURRENT_POS          30  // Position of current_pos parameter
 
-const prog_char WH1080_REPORT[] PROGMEM = {
+const char WH1080_REPORT[] PROGMEM = {
   0xa1, 0x00, 0x00, 0x20, 0xa1, 0x00, 0x00, 0x20
 };