fixed second CSMA-delay

src/didacticNet.cpp

@@ -49,7 +49,9 @@ bool didacticPSNet::handleNetwork(){
   	else if(_dataToSend){
   		//send data to network
       //TODO: test added CSMA_CHECKDELAY + 2nd checkData()
-      delayMicroseconds(CSMA_CHECK_DELAY_US);
+      unsigned long delayStartTime = micros();
+      while(micros() < delayStartTime + CSMA_CHECK_DELAY_US);
+      //delayMicroseconds(CSMA_CHECK_DELAY_US); //removed: blocking SoftSerial-interrupts
       if(!checkData()){
       	if(!sendData()){
     			return false;

src/didacticNet.h

@@ -31,7 +31,7 @@
 #define CSMA_MID_DELAY_MS 20
 #define CSMA_MAX_DELAY_MS 30
 
-#define MAX_NR_TOPICS_CLIENT  5
+#define MAX_NR_TOPICS_CLIENT  10
 #define MAX_NR_TOPICS_BROKER  20
 #define MAX_LEN_TOPICS 10
 #define MAX_LEN_DATA   20