diff --git a/MqttClient.cpp b/MqttClient.cpp
index 248e341..30f3d35 100644
--- a/MqttClient.cpp
+++ b/MqttClient.cpp
@@ -35,25 +35,38 @@ MqttClient::MqttClient(RequestSender *meterBusMaster) :
             m_disconnectState(3), m_disconnectTime(millis()), m_uptime(0)
 {
   for (uint8_t i = 0; i < NUM_OF_DEVICES; i++) {
-    m_mbusDevTuple[i].address = 0;
-    m_mbusDevTuple[i].queryPeriod = 0;
-    m_mbusDevTuple[i].timer = 0;
+    m_mbusDevTuple[i] = { 0, 0, 0 };
   }
 
-  m_mbusDevTuple[0].address = 0x53;
-  m_mbusDevTuple[0].queryPeriod = 60;
-  m_mbusDevTuple[0].timer = m_mbusDevTuple[0].queryPeriod;
+  m_mbusDevTuple[0] = { 0x53, 60, 0 }; // light meter
 }
 
 void MqttClient::sendResponse(uint8_t *responseBuffer, uint16_t responseBufferLength) {
   char strbuf[256];
   memset(strbuf, sizeof(strbuf), 0);
   PString buf = PString(strbuf, sizeof(strbuf));
+
+
   buf << "{ \"metadata\": { \"device\": \"MeterbusHub\" }, " <<
       "\"data\": {" <<
-      "\"uptime\": " << m_uptime <<
-      "}" <<
-      "}" << endl;
+      "\"uptime\": " << m_uptime << ", "
+      "\"telegram\": \"";
+
+      uint16_t i = 0;
+      while (true) {
+        if (responseBuffer[i] <= 0x0f) {
+          buf.print("0");
+        }
+        buf.print(responseBuffer[i], HEX);
+        buf.print(" ");
+        i++;
+        if (i == responseBufferLength) {
+          break;
+        }
+      }
+
+  buf << "\"}}";
+
   if (m_disconnectState == 0) {
     m_mqttClient.publish("MeterbusHub.Measurement", strbuf);
   } else {
@@ -119,11 +132,19 @@ void MqttClient::exec() {
 
 
     for (uint8_t i = 0; i < NUM_OF_DEVICES; i++) {
-      m_mbusDevTuple[i].timer -= 1;
-      if (m_mbusDevTuple[i].timer == 0) {
+      if ((m_mbusDevTuple[i].address != 0) && (m_mbusDevTuple[i].timer == 0)) {
         m_mbusDevTuple[i].timer = m_mbusDevTuple[i].queryPeriod;
         Serial << "Issue request for device " << m_mbusDevTuple[i].address << endl;
+
+        uint8_t *sendBuffer = m_meterBusMaster->getSendBuffer();
+        sendBuffer[0] = 0x10;
+        sendBuffer[1] = 0x5b;
+        sendBuffer[2] = m_mbusDevTuple[i].address;
+        sendBuffer[3] = (uint8_t)(sendBuffer[1] + sendBuffer[2]);
+        sendBuffer[4] = 0x16;
+        m_meterBusMaster->sendBufferReady(5, this);
       }
+      m_mbusDevTuple[i].timer -= 1;
     }
   }
 
diff --git a/meterBusMaster.cpp b/meterBusMaster.cpp
index 34f4b79..449db14 100644
--- a/meterBusMaster.cpp
+++ b/meterBusMaster.cpp
@@ -241,7 +241,7 @@ void MeterBusMaster::exec() {
 
     if (m_cmdReadyToSend) {
       sample();
-      Serial << "MeterBusMaster: sending " << m_sendBufLen << " octets." << endl;
+      // Serial << "MeterBusMaster: sending " << m_sendBufLen << " octets." << endl;
       Serial3.write(m_sendBuffer, m_sendBufLen);
       Serial3.flush();
       hold();
@@ -267,7 +267,7 @@ void MeterBusMaster::exec() {
 
     int serialInChar = Serial3.read();
     if (serialInChar != -1) {
-      Serial << "Got: " << _HEX(serialInChar) << endl;
+      // Serial << "Got: " << _HEX(serialInChar) << endl;
     }
     if ((serialInChar != -1) && m_expectResponse) {
       prepareResponse(false, (uint8_t)serialInChar);