diff --git a/src/CHANGES.md b/src/CHANGES.md
index 0c096321..75ab7826 100644
--- a/src/CHANGES.md
+++ b/src/CHANGES.md
@@ -2,6 +2,10 @@
 
 (starting from release version `0.5.66`)
 
+## 0.5.84
+* fix blue LED lights up all the time #672
+* added an instant start communication (once NTP is synced)
+
 ## 0.5.83
 * fix MQTT publishing, `callback` was set but reset by following `setup()`
 
diff --git a/src/app.cpp b/src/app.cpp
index 92512108..cdaa7661 100644
--- a/src/app.cpp
+++ b/src/app.cpp
@@ -164,7 +164,8 @@ void app::tickNtpUpdate(void) {
             mMqttReconnect = false;
         }
 
-        everyMin(std::bind(&app::tickMinute, this), "tMin");
+        if(mConfig->inst.rstValsNotAvail)
+            everyMin(std::bind(&app::tickMinute, this), "tMin");
         if(mConfig->inst.rstYieldMidNight) {
             uint32_t midTrig = mTimestamp - ((mTimestamp - 1) % 86400) + 86400; // next midnight
             onceAt(std::bind(&app::tickMidnight, this), midTrig, "midNi");
@@ -176,6 +177,12 @@ void app::tickNtpUpdate(void) {
             mCalculatedTimezoneOffset = (int8_t)((mConfig->sun.lon >= 0 ? mConfig->sun.lon + 7.5 : mConfig->sun.lon - 7.5) / 15) * 3600;
             tickCalcSunrise();
         }
+
+        // immediately start communicating
+        if(isOK && mSendFirst) {
+            mSendFirst = false;
+            once(std::bind(&app::tickSend, this), 2, "senOn");
+        }
     }
     once(std::bind(&app::tickNtpUpdate, this), nxtTrig, "ntp");
 }
@@ -246,17 +253,17 @@ void app::tickComm(void) {
 
 //-----------------------------------------------------------------------------
 void app::tickMinute(void) {
-    if(mConfig->inst.rstValsNotAvail) {
-        Inverter<> *iv;
-        // set values to zero, except yields
-        for (uint8_t id = 0; id < mSys.getNumInverters(); id++) {
-            iv = mSys.getInverterByPos(id);
-            if (NULL == iv)
-                continue; // skip to next inverter
+    // only triggered if 'reset values on no avail is enabled'
 
-            if(!iv->isAvailable(mTimestamp) && !iv->isProducing(mTimestamp) && iv->config->enabled)
-                mPayload.zeroInverterValues(iv);
-        }
+    Inverter<> *iv;
+    // set values to zero, except yields
+    for (uint8_t id = 0; id < mSys.getNumInverters(); id++) {
+        iv = mSys.getInverterByPos(id);
+        if (NULL == iv)
+            continue; // skip to next inverter
+
+        if(!iv->isAvailable(mTimestamp) && !iv->isProducing(mTimestamp) && iv->config->enabled)
+            mPayload.zeroInverterValues(iv);
     }
 }
 
@@ -325,6 +332,8 @@ void app::resetSystem(void) {
     mTimestamp = 1;
 #endif
 
+    mSendFirst = true;
+
     mSunrise = 0;
     mSunset  = 0;
 
diff --git a/src/app.h b/src/app.h
index 47990928..c0fefcf1 100644
--- a/src/app.h
+++ b/src/app.h
@@ -256,6 +256,7 @@ class app : public IApp, public ah::Scheduler {
         settings_t *mConfig;
 
         uint8_t mSendLastIvId;
+        bool mSendFirst;
 
         statistics_t mStat;
 
diff --git a/src/defines.h b/src/defines.h
index ddf017e9..58ad1674 100644
--- a/src/defines.h
+++ b/src/defines.h
@@ -13,7 +13,7 @@
 //-------------------------------------
 #define VERSION_MAJOR       0
 #define VERSION_MINOR       5
-#define VERSION_PATCH       83
+#define VERSION_PATCH       84
 
 //-------------------------------------
 typedef struct {
diff --git a/src/hm/hmPayload.h b/src/hm/hmPayload.h
index d59ca5dd..b0f256bc 100644
--- a/src/hm/hmPayload.h
+++ b/src/hm/hmPayload.h
@@ -93,7 +93,6 @@ class HmPayload {
                         case FLD_ACT_ACTIVE_PWR_LIMIT:
                             fld++;
                             continue;
-                            break;
                     }
                     pos = iv->getPosByChFld(ch, fld, rec);
                     iv->setValue(pos, rec, 0.0f);
diff --git a/src/hm/hmRadio.h b/src/hm/hmRadio.h
index 203e3b7f..80738e48 100644
--- a/src/hm/hmRadio.h
+++ b/src/hm/hmRadio.h
@@ -118,6 +118,8 @@ class HmRadio {
             DPRINTLN(DBG_INFO, String(rf24AmpPowerNames[ampPwr]));
             mNrf24.setPALevel(ampPwr & 0x03);
 
+            mNrf24.startListening();
+
             if(mNrf24.isChipConnected()) {
                 DPRINTLN(DBG_INFO, F("Radio Config:"));
                 mNrf24.printPrettyDetails();
@@ -138,7 +140,6 @@ class HmRadio {
             // start listening on the default RX channel
             mRxChIdx = 0;
             mNrf24.setChannel(mRfChLst[mRxChIdx]);
-            mNrf24.startListening();
 
             //uint32_t debug_ms = millis();
             uint16_t cnt = 300; // that is 60 times 5 channels
@@ -160,7 +161,6 @@ class HmRadio {
             }
             // not finished but time is over
             //DBGPRINTLN("RX not finished: 300 time used: " + String(millis()-debug_ms)+ " ms");
-            mNrf24.stopListening();
             return true;
         }
 
@@ -299,6 +299,7 @@ class HmRadio {
                 dumpBuf(mTxBuf, len);
             }
 
+            mNrf24.stopListening();
             mNrf24.setChannel(mRfChLst[mTxChIdx]);
             mNrf24.openWritingPipe(reinterpret_cast<uint8_t*>(&invId));
             mNrf24.startWrite(mTxBuf, len, false); // false = request ACK response
diff --git a/src/publisher/pubMqtt.h b/src/publisher/pubMqtt.h
index 47b62353..94524faf 100644
--- a/src/publisher/pubMqtt.h
+++ b/src/publisher/pubMqtt.h
@@ -385,8 +385,7 @@ class PubMqtt {
             /*char out[128];
             serializeJson(root, out, 128);
             DPRINTLN(DBG_INFO, "json: " + String(out));*/
-            if(NULL != mSubscriptionCb)
-                (mSubscriptionCb)(root);
+            (mSubscriptionCb)(root);
 
             mRxCnt++;
         }