diff --git a/include/payload.h b/include/payload.h
index b41bb113..b2d5683f 100644
--- a/include/payload.h
+++ b/include/payload.h
@@ -3,6 +3,10 @@
 
 #include "paxcounter.conf"
 
+#if (HAS_SDS011)
+#include "sds011read.h"
+#endif
+
 // MyDevices CayenneLPP 1.0 channels for Synamic sensor payload format
 // all payload goes out on LoRa FPort 1
 #if (PAYLOAD_ENCODER == 3)
@@ -55,6 +59,9 @@ public:
   void addButton(uint8_t value);
   void addSensor(uint8_t[]);
   void addTime(time_t value);
+  void addPM10(float value);
+  void addPM25(float value);
+  void addChars( char* string, int len);
 
 #if (PAYLOAD_ENCODER == 1) // format plain
 
@@ -95,4 +102,4 @@ private:
 
 extern PayloadConvert payload;
 
-#endif // _PAYLOAD_H_
\ No newline at end of file
+#endif // _PAYLOAD_H_
diff --git a/include/senddata.h b/include/senddata.h
index 5022800c..324f2e1f 100644
--- a/include/senddata.h
+++ b/include/senddata.h
@@ -16,6 +16,10 @@
 #include "sdcard.h"
 #endif
 
+#if (HAS_SDS011)
+#include "sds011read.h"
+#endif
+
 extern Ticker sendcycler;
 
 void SendPayload(uint8_t port, sendprio_t prio);
diff --git a/src/payload.cpp b/src/payload.cpp
index 323e402b..2624c138 100644
--- a/src/payload.cpp
+++ b/src/payload.cpp
@@ -489,5 +489,41 @@ void PayloadConvert::addTime(time_t value) {
   buffer[cursor++] = (byte)((tx_period & 0x000000FF));
 #endif
 }
+#endif // PAYLOAD_ENCODER
 
-#endif
\ No newline at end of file
+void PayloadConvert::addPM10( float value) {
+#if (HAS_SDS011)
+#if (PAYLOAD_ENCODER == 1)   // plain
+    char tempBuffer[10+1];
+    sprintf( tempBuffer, ",%5.1f", value);
+    addChars(tempBuffer, strlen(tempBuffer));
+#elif (PAYLOAD_ENCODER == 2 ) // packed
+    writeUint16( (uint16_t) (value*10) );
+#elif (PAYLOAD_ENCODER == 3 ) // Cayenne LPP dynamic
+    // TODO
+#elif (PAYLOAD_ENCODER == 4 ) // Cayenne LPP packed
+    // TODO
+#endif
+#endif // HAS_SDS011
+}
+
+void PayloadConvert::addPM25( float value) {
+#if (HAS_SDS011)
+#if (PAYLOAD_ENCODER == 1)   // plain
+    char tempBuffer[10+1];
+    sprintf( tempBuffer, ",%5.1f", value);
+    addChars(tempBuffer, strlen(tempBuffer));
+#elif (PAYLOAD_ENCODER == 2 ) // packed
+    writeUint16( (uint16_t) (value*10) );
+#elif (PAYLOAD_ENCODER == 3 ) // Cayenne LPP dynamic
+    // TODO
+#elif (PAYLOAD_ENCODER == 4 ) // Cayenne LPP packed
+    // TODO
+#endif
+#endif // HAS_SDS011
+}
+
+void PayloadConvert::addChars( char * string, int len) {
+  for (int i=0; i < len; i++)
+      addByte(string[i]);
+}
diff --git a/src/senddata.cpp b/src/senddata.cpp
index db0a4e20..367a5c68 100644
--- a/src/senddata.cpp
+++ b/src/senddata.cpp
@@ -3,6 +3,11 @@
 
 Ticker sendcycler;
 
+#if (HAS_SDS011)
+extern float pm10;
+extern float pm25;
+#endif
+
 void sendcycle() {
   xTaskNotifyFromISR(irqHandlerTask, SENDCYCLE_IRQ, eSetBits, NULL);
 }
@@ -98,6 +103,10 @@ void sendData() {
         payload.addCount(macs_wifi, MAC_SNIFF_WIFI);
       if (cfg.blescan)
         payload.addCount(macs_ble, MAC_SNIFF_BLE);
+#endif
+#if (HAS_SDS011)
+      payload.addPM10(pm10);
+      payload.addPM25(pm25);
 #endif
       SendPayload(COUNTERPORT, prio_normal);
       // clear counter if not in cumulative counter mode