Thanks guys ! Everything works fine .

@mfalkvidd

Thank you for your answer !!!
You're right. Radio module was defective (every 3 pcs.). I got new ones today and now everything works fine. I still have some questions about code.

• Why do i get response from sensor every 8 minutes ?

• May I operate my cheap Aliexpress radio module (nRF24L01+PA+LNA) with MY_RF24_PA_LEVEL RF24_PA_MAX ? Power supply is enough.

Gateway is ok. Other sensors are connected.

This is from Gateway:

0;255;3;0;9;0 MCO:BGN:INIT GW,CP=RNNGA---,REL=255,VER=2.3.1
0;255;3;0;9;5 TSM:INIT
0;255;3;0;9;7 TSF:WUR:MS=0
0;255;3;0;9;14 TSM:INIT:TSP OK
0;255;3;0;9;17 TSM:INIT:GW MODE
0;255;3;0;9;20 TSM:READY:ID=0,PAR=0,DIS=0
0;255;3;0;9;24 MCO:REG:NOT NEEDED
0;255;3;0;14;Gateway startup complete.
0;255;0;0;18;2.3.1
0;255;3;0;9;28 MCO:BGN:STP
0;255;3;0;9;34 MCO:BGN:INIT OK,TSP=1
0;255;3;0;9;37 TSM:READY:NWD REQ
0;255;3;0;9;76 TSF:MSG:SEND,0-0-255-255,s=255,c=3,t=20,pt=0,l=0,sg=0,ft=0,st=OK:

That's from sensor:

16 MCO:BGN:INIT REPEATER,CP=RNNRA---,REL=255,VER=2.3.1
26 MCO:BGN:BFR
28 TSM:INIT
29 TSF:WUR:MS=10000
35 !TSM:INIT:TSP FAIL
37 TSM:FAIL:CNT=1
39 TSM:FAIL:DIS
40 TSF:TDI:TSL
10030 MCO:BGN:STP
Hello world
Loaded: 35
Warming up the sensors (15 seconds).
10042 TSM:FAIL:RE-INIT
10044 TSM:INIT
10050 !TSM:INIT:TSP FAIL
10052 TSM:FAIL:CNT=2
10054 TSM:FAIL:DIS
10056 TSF:TDI:TSL
20059 TSM:FAIL:RE-INIT
20061 TSM:INIT
20067 !TSM:INIT:TSP FAIL
20069 TSM:FAIL:CNT=3
20071 TSM:FAIL:DIS
20073 TSF:TDI:TSL

I changed code but it still does not work.

/*
 *
 * DESCRIPTION
 * 
 * This node can measure the moisture of 6 different plants. It uses the cheap 'capacitive analog 
 * moisture sensor' that you can get for about 3 dollars an Aliexpress or eBay. For example:
 * https://www.aliexpress.com/item/Analog-Capacitive-Soil-Moisture-Sensor-V1-2-Corrosion-Resistant-Z09-Drop-ship/32858273308.html
 * 
 * Each plant' moisture value can also be responded to individually, either by turning on an LED (wire that to the plan, and you can see which one is thirsty) or, if you want, per-plant automated irrigation by connecting a little solenoid..
 * 
 * 
 * SETTINGS */

#define NUMBER_OF_SENSORS 1   // How many moisture sensors are connected?

#define SLEEPTIME 100         // How many seconds should pass between checking on the plants? Don't make this less than 15 or more than 255.
     


 /* END OF SETTINGS
  *  
  *  
  *  
  *  
  *  
  *  
  *  
  *  
  *  
  */

// Enable MySensors debug prints to serial monitor
#define MY_DEBUG 

// Enable and select radio type attached
#define MY_RADIO_RF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95

// Set LOW transmit power level as default, if you have an amplified NRF-module and power your radio separately with a good regulator you can turn up PA level. Choose one:
//#define MY_RF24_PA_LEVEL RF24_PA_MIN
#define MY_RF24_PA_LEVEL RF24_PA_LOW
//#define MY_RF24_PA_LEVEL RF24_PA_HIGH
//#define MY_RF24_PA_LEVEL RF24_PA_MAX

// Easy to use security, yay!
//#define MY_SIGNING_SOFT_RANDOMSEED_PIN A7         // setting a pin to pickup noise makes encryption more secure.

// Advanced features
#define MY_TRANSPORT_WAIT_READY_MS 10000            // try connecting for 10 seconds. Otherwise just continue.
//#define MY_RF24_CHANNEL 100                       // in EU the default channel 76 overlaps with wifi.
//#define MY_RF24_DATARATE RF24_1MBPS               // slower datarate makes the network more stable?
//#define MY_NODE_ID 13                             // giving a node a manual ID can in rare cases fix connection issues.
//#define MY_PARENT_NODE_ID 0                       // fixating the ID of the gatewaynode can in rare cases fix connection issues.
//#define MY_PARENT_NODE_IS_STATIC                  // Used together with setting the parent node ID. Daking the controller ID static can in rare cases fix connection issues.
//#define MY_SPLASH_SCREEN_DISABLED                   // saves a little memory.
//#define MY_DISABLE_RAM_ROUTING_TABLE_FEATURE      // saves a little memory.



//
// FURTHER SETTINGS
//

#define IRRIGATION_RELAYS 6                         // How many irrigation relays are connected?
#define SLEEPTIME 100                               // In seconds, how often should a measurement be made and sent to the server? The maximum delay between measurements is once every 254 seconds, but if you change "byte" to "int" further down in the code you could create more time between each loop.
#define LOOPDURATION 5000                           // The main loop runs every x milliseconds. This main loop starts the modem, and from then on periodically requests the password.

#define RF_DELAY 100                                // Milliseconds betweeen radio signals during the presentation phase.

// Do you want this node to also be a repeater?
#define MY_REPEATER_FEATURE                         // Just add or remove the two slashes at the beginning of this line to select if you want this sensor to act as a repeater for other sensors. If this node is on battery power, you probably shouldn't enable this. Otherwise it's smart to make every node also a repeater.


//
// Do not change below this line
// 

#include <MySensors.h>



#ifdef HAS_SCREEN
#include <SoftwareSerial.h>
SoftwareSerial mySerial(7,6);                       // RX, TX
#endif


static const uint8_t analog_pins[] = {A0,A1,A2,A3,A4,A5};
byte moistureLevels[6] = {1, 2, 3, 4, 5, 6};
byte moistureThresholds[6] = {35, 35, 35, 35, 35, 35}; // for each plant we can have a unique moisture level to compare against.
MyMessage thresholdMsg(0, V_PERCENTAGE);            // used to create a dimmer on the controller that controls the mosture threshold;
MyMessage msg(0, V_LEVEL);                          // used to send moisture level data to the gateway

//const char xxxx = "hello";
//const char ids[7] = "112233445566";


void before()
{

  //for (byte i = 3; i < NUMBER_OF_SENSORS + 3; i++){ // Set the LED (or irrigation vales) to their initial position. Because Mysensors uses pin 2, we use pin 3 till 8 as output.
  //  pinMode(i, OUTPUT);
  //  digitalWrite(i, LOW);
  //}
  
}


void presentation()
{
  // Send the sketch version information to the gateway and Controller
  sendSketchInfo(F("Plant Health"), F("1.3"));  wait(RF_DELAY);

  // Present the sensors
  //for (byte i=0; i<NUMBER_OF_SENSORS*2 ; i=i+2) {
    present(0, S_MOISTURE, "1");  wait(RF_DELAY);       // present all the sensors
    present(1, S_DIMMER, "1");  wait(RF_DELAY);       // present the dimmers to set the level with.
    present(2, S_MOISTURE, "2");  wait(RF_DELAY);       // present all the sensors
    present(3, S_DIMMER, "2");  wait(RF_DELAY);       // present the dimmers to set the level with.
    present(4, S_MOISTURE, "3");  wait(RF_DELAY);       // present all the sensors
    present(5, S_DIMMER, "3");  wait(RF_DELAY);       // present the dimmers to set the level with.
    present(6, S_MOISTURE, "4");  wait(RF_DELAY);       // present all the sensors
    present(7, S_DIMMER, "4");  wait(RF_DELAY);       // present the dimmers to set the level with.
    present(8, S_MOISTURE, "5");  wait(RF_DELAY);       // present all the sensors
    present(9, S_DIMMER, "5");  wait(RF_DELAY);       // present the dimmers to set the level with.
    present(10, S_MOISTURE, "6");  wait(RF_DELAY);       // present all the sensors
    present(11, S_DIMMER, "6");  wait(RF_DELAY);       // present the dimmers to set the level with.
  //}


}

void setup()
{
  Serial.begin(115200);                             // Start serial output of data.
  while (!Serial) {}                                // Wait for serial connection to be initiated
  Serial.println(F("Hello world"));

  //Serial.print("ids-"); Serial.println(ids[1]);

  // Setup pins for input
  //for (byte i = 15; i < 21; i++) {
  //}

  // Setup pins for input
  for (int i = 0; i < NUMBER_OF_SENSORS; i++) { //or i <= 5
    pinMode(analog_pins[i], INPUT); // experimental new: added the pullup.
     wait(1);
  }


#ifdef HAS_SCREEN
  mySerial.begin(115200);
  //wait(1500);
  //mySerial.print("RESET;");
  wait(1500);
  mySerial.print("CLR(0);");
  mySerial.print("BOXF(0,0,128,18,15);");
  mySerial.print("DCV16(5,1,Plant health, 10);");
  if(isTransportReady()){
    mySerial.print("DCV16(115,1,w,0);");
  }
  for (byte i=0; i<NUMBER_OF_SENSORS ; i++) {
    byte verticalPosition = i*18+28;
    mySerial.print("BOXF(3," + String(verticalPosition) + ",124," + String(verticalPosition + 16) + ",15);");
    mySerial.print("DCV16(5," + String(verticalPosition) + ",A" + i + ",0);");
  }
  mySerial.println();
  wait(500);
#endif

  // load the threshold level from the built-in EEPROM memory.
  for (byte i=0; i<NUMBER_OF_SENSORS ; i++) {
    moistureThresholds[i] = loadState(i);
    if(moistureThresholds[i] > 99){moistureThresholds[i] = 35;}
    Serial.print(F("Loaded: ")); Serial.println(moistureThresholds[i]);
  }
  
  Serial.println(F("Warming up the sensors (15 seconds).")); // to avoid weird measurements
  wait(15000);
  request(1, V_PERCENTAGE ); wait(RF_DELAY); // to-do: only present the actually connected number of sensors.
  request(3, V_PERCENTAGE ); wait(RF_DELAY);
  request(5, V_PERCENTAGE ); wait(RF_DELAY);
  request(7, V_PERCENTAGE ); wait(RF_DELAY);
  request(9, V_PERCENTAGE ); wait(RF_DELAY);
  request(11, V_PERCENTAGE ); wait(RF_DELAY);

  wdt_enable(WDTO_8S);                              // Starts the watchdog timer. If it is not reset once every 2 seconds, then the entire device will automatically restart.                                
}


void loop()
{

  //
  // MAIN LOOP
  // Runs every few seconds. By counting how often this loop has run (and resetting that counter back to zero after 250 loops), it becomes possible to schedule all kinds of things without using a lot of memory.
  // Maximum time that can be scheduled is 4s * 250 loops = 1000 seconds. So the maximum time between sending data can be 16 minutes.
  //

  static byte loopCounter = 0;                      // Counts the loops until the SLEEPTIME value has been reached. Then new data is sent to the controller.
  static boolean loopDone = false;                  // used to make sure the 'once every millisecond' things only run once every millisecond (or 2.. sometimes the millis() function skips a millisecond.);

  // Avoid the loop running at the speed of the processor (multiple times per millisecond). This entire construction saves memory by not using a long to store the last time the loop ran.
  if( (millis() % LOOPDURATION) > LOOPDURATION - 4 && loopDone == true ) {
    loopDone = false;  
  }

  // Main loop to time actions.
  if( (millis() % LOOPDURATION) < 4 && loopDone == false ) { // the 4 is just a precaution: sometimes the milli() function skips a millisecond. This ensure the loop code still runs in that rare case.
    loopDone = true;
    //loopCounter++;
    Serial.print(F("__loop_"));Serial.println(loopCounter);

    wdt_reset(); // Reset the watchdog timer

    byte selectedSensor = loopCounter % NUMBER_OF_SENSORS;
    Serial.print(F("_modulo:_")); Serial.println(selectedSensor);
    //for (byte i=0; i<NUMBER_OF_SENSORS; i++){         // loop over all the sensors.

      int16_t moistureLevel = analogRead(analog_pins[selectedSensor]);
      Serial.print(F(" moisture level (pre): "));
      Serial.println(moistureLevel);
      if(moistureLevel > 700){moistureLevel = 700;}
      moistureLevel = map(moistureLevel,0,700,0,99); // The maximum voltage output of the capacitive sensor is 3V, so since we're measuring 0-5v about 614 is the highest value we'll ever get.
      Serial.print(selectedSensor);
      Serial.print(F(" moisture level %: "));
      Serial.println(moistureLevel);

      //if(moistureLevels[selectedSensor] != moistureLevel){

      //byte dimmerID = selectedSensor + 1; //(selectedSensor*2)+1;
      //Serial.print(F("Requesting dimmer ")); Serial.println(dimmerID);
      // request(dimmerID, V_DIMMER ); // from now on we let the server push the value.
      moistureLevels[selectedSensor] = moistureLevel;   
         
#ifdef HAS_SCREEN
      drawItem(selectedSensor);
 
#endif



      //}
      //if(digitalRead(shiftedDigitalPin) == HIGH){  // outputs the LED/irrigation status via serial. This code can be removed.
      //  Serial.print(F("- currently watering until "));
      //  Serial.println(moistureThresholds[selectedSensor] + 10);
      //}


      // TO-DO actuator
      // byte shiftedDigitalPin = selectedSensor + 3;
      
      if( moistureLevel < moistureThresholds[selectedSensor] ){   // if the plant doesn' have enough water, turn on the LED/water.
        Serial.print(F("- moisture level is below ")); Serial.println(moistureThresholds[selectedSensor]);
        //digitalWrite(shiftedDigitalPin, HIGH);
      }else if (moistureLevel >= moistureThresholds[selectedSensor] + 10){  // turn of the water/led if the plant is wet enough.
        //digitalWrite(shiftedDigitalPin, LOW);
      }

      if(loopCounter == 0){                          
        // Whole dealing with the first sensor we also do a check if the server is responding ok. It it doesn't respond, remove the connection icon.
        if(send(msg.setSensor(selectedSensor*2).set(moistureLevel),1)){ // ask for a receipt
          Serial.println(F("Connection is ok"));
#ifdef HAS_DISPLAY
          // add W icon
          mySerial.print(F("DCV16(115,1,w,0);"));
#endif
        }else {
          Serial.println(F("Connection lost"));
#ifdef HAS_DISPLAY
          // remove W icon
          mySerial.print(F("DCV16(115,1, ,0);"));
#endif        
        }
        
      } else if(loopCounter < NUMBER_OF_SENSORS){       // During the first few loops the script will send updated data.
        if(loopCounter == selectedSensor){                           // It sends sensor 0 at second 0. Sensor 1 at second 1, etc. This keeps the radio happy.
          Serial.println(F("- sending data."));
          send(msg.setSensor(selectedSensor*2).set(moistureLevel));  // 0, 2, 4 etc
        }
      }
    
    loopCounter++;
    if(loopCounter >= SLEEPTIME){                       // If enough time has passed, the counter is reset, and new data is sent.
      loopCounter = 0;
    }
  }
}



void receive(const MyMessage &message)
{
  Serial.print(F("<- message for child #")); Serial.println(message.sensor);
  
  if (message.type == V_PERCENTAGE) {

    //  Retrieve the power or dim level from the incoming request message
    int requestedLevel = atoi( message.data );
    Serial.print(F("Requested level is "));
    Serial.println( requestedLevel );
    
    byte sensorID = (message.sensor - 1) / 2;
    // Adjust incoming level if this is a V_LIGHT variable update [0 == off, 1 == on]
    // requestedLevel *= ( message.type == V_LIGHT ? 100 : 1 );

    //if(message.sensor == ROTATING_PASSWORD2_ID){

    Serial.print(F("Before clipping requested level: "));
    Serial.println( requestedLevel );

    // Clip incoming level to valid range of 0 to 100
    //requestedLevel = requestedLevel > 100 ? 100 : requestedLevel;
    //requestedLevel = requestedLevel < 0   ? 0   : requestedLevel;
    if(requestedLevel > 100){ requestedLevel = 100;}
    if(requestedLevel < 0){ requestedLevel = 0;}

    if(requestedLevel < 1 ||  requestedLevel > 99){
    }else{
      Serial.print(F("Changing level to "));
      Serial.print( byte(requestedLevel) );
      Serial.print(F(", from "));
      Serial.println( moistureThresholds[sensorID] );
      moistureThresholds[sensorID] = byte(requestedLevel);
      saveState(sensorID, moistureThresholds[sensorID]);

      //drawItem(sensorID); // Finally, update the screen.
    }
    
    // Inform the gateway of the current DimmableLED's SwitchPower1 and LoadLevelStatus value...
    //send(lightMsg.set(currentLevel > 0));

    // hek comment: Is this really nessesary?
    //send( dimmerMsg.set(currentLevel) );

  }
}

#ifdef HAS_SCREEN
void drawItem(byte selectedSensor)
{
  // Prepare variables to send to the screen.
  byte verticalPosition = selectedSensor*18+28;
  Serial.println(verticalPosition);
  byte color = 10;  // green
  String spacer = F("");
  if( moistureLevels[selectedSensor] < 10){spacer = F(" ");}
  if(moistureLevels[selectedSensor] <= moistureThresholds[selectedSensor]){ // set the font color. Red if the plan is thirsty.
    color = 1;      // red
  }else if(moistureLevels[selectedSensor] <= moistureThresholds[selectedSensor] + 5){ // black for normal
    color = 13;     // orange
  }
  
  // Create graph
  Serial.print(F("/// Creating graph for: ")); Serial.println(selectedSensor);
  mySerial.print(F("BOXF(25,"));
  mySerial.print(String(verticalPosition + 1) + "," + String(25 + moistureLevels[selectedSensor])  + "," + String(verticalPosition + 16) + "," + String(color) + ");");
  mySerial.print("BOXF(" + String(25 + moistureLevels[selectedSensor] + 1) + ","  + String(verticalPosition + 1) + ",124," + String(verticalPosition + 16) + ",7);");
  
  mySerial.print("PL(" + String(25 + moistureThresholds[selectedSensor]) + "," + String(verticalPosition + 3) + "," + String(25 + moistureThresholds[selectedSensor])  + "," + String(verticalPosition + 14) + ",8);"); // Small vertical line that indicates the threshold
  
  mySerial.println("DCV16(5," + String(verticalPosition) + "," + String(spacer) + String(moistureLevels[selectedSensor]) + "," + String(color) + ");"); // Moisture level number on the left
  //mySerial.println();
  //String screenCommand = F("DCV16(5,");
  //screenCommand += String(verticalPosition) + F(" ,");
  //screenCommand += String(moistureLevel) + F(", ") + String(color) + F(");");
  //Serial.println(screenCommand);
  //mySerial.print(screenCommand);
  //wait(200); 
  
}
#endif


/* THANKS TO
 * 
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 */```

I have not changed anything. I'm not so good with code. Which part should I change?

I tried to connect to Mysensors Seriel Gateway but it does not work. The Soil Moisture Sensor is not visible for Gateway .

Many Thanks !

I will try. :+1:

Hi !
Can someone send sketch for Soil Moisture Sensor. I need ANALOG value from sensor.

My sensor is capacitive (not resistant) but that should not matter because also sends analog value.

Thanks in advance !

Ok ! Sorry !

After several reset from raspberry is the sensor visible by Domoticz, but is not in device list.

0 MCO:BGN:INIT NODE,CP=RNNNA--,VER=2.1.1
3 TSM:INIT
4 TSF:WUR:MS=0
11 TSM:INIT:TSP OK
13 TSF:SID:OK,ID=2
14 TSM:FPAR
51 TSF:MSG:SEND,2-2-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
775 TSF:MSG:READ,0-0-2,s=255,c=3,t=8,pt=1,l=1,sg=0:0
780 TSF:MSG:FPAR OK,ID=0,D=1
2058 TSM:FPAR:OK
2059 TSM:ID
2060 TSM:ID:OK
2062 TSM:UPL
2065 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1
2074 TSF:MSG:READ,0-0-2,s=255,c=3,t=25,pt=1,l=1,sg=0:1
2079 TSF:MSG:PONG RECV,HP=1
2081 TSM:UPL:OK
2083 TSM:READY:ID=2,PAR=0,DIS=1
2087 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0100
2095 TSF:MSG:READ,0-0-2,s=255,c=3,t=15,pt=6,l=2,sg=0:0100
2102 TSF:MSG:SEND,2-2-0-0,s=255,c=0,t=17,pt=0,l=5,sg=0,ft=0,st=OK:2.1.1
2110 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=6,pt=1,l=1,sg=0,ft=0,st=OK:0
2123 TSF:MSG:READ,0-0-2,s=255,c=3,t=6,pt=0,l=1,sg=0:M
2132 TSF:MSG:SEND,2-2-0-0,s=0,c=0,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
2139 MCO:REG:REQ
2146 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=OK:2
2152 TSF:MSG:READ,0-0-2,s=255,c=3,t=27,pt=1,l=1,sg=0:1
2157 MCO:PIM:NODE REG=1
2160 MCO:BGN:INIT OK,TSP=1
2168 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=2,l=2,sg=0,ft=0,st=OK:413
2174 MCO:SLP:MS=30000,SMS=0,I1=255,M1=255,I2=255,M2=255
2180 MCO:SLP:TPD
2182 MCO:SLP:WUP=-1
2189 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=2,l=2,sg=0,ft=0,st=OK:412
2195 MCO:SLP:MS=30000,SMS=0,I1=255,M1=255,I2=255,M2=255
2200 MCO:SLP:TPD
2202 MCO:SLP:WUP=-1
2209 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=2,l=2,sg=0,ft=0,st=OK:412
2214 MCO:SLP:MS=30000,SMS=0,I1=255,M1=255,I2=255,M2=255
2220 MCO:SLP:TPD

Sensor logs on to Gateway only with original sketch. Other sketchs can be quite normal uploaded to Arduino but remains for GW invisible.

// Enable debug prints to serial monitor
#define MY_DEBUG

// Enable and select radio type attached
#define MY_RADIO_NRF24
#define CHILD_ID_MOISTURE 0

#include <MySensors.h>
// Here we are setting up some water thresholds that we will
// use later. Note that you will need to change these to match
// your soil type and environment. It doesn't do much for me because I'm using domoticz
int thresholdUp = 400;
int thresholdDown = 075;
MyMessage msg(CHILD_ID_MOISTURE, S_HUM);
unsigned long SLEEP_TIME = 30000;

// We are setting up the pin A0 on the redboard to be our sensor
// pin input:
int sensorPin = A0;

void presentation()
{
present(CHILD_ID_MOISTURE, S_HUM);
}

void loop()
{
int sensorValue;
sensorValue = analogRead(sensorPin);

//send back the values
send(msg.set(sensorValue));
// delay until next measurement (msec)
sleep(SLEEP_TIME);
}