Problem between Radiohead and FreqCount


I hope someone would be able to help me. I’m preparing a board which will measure a frequency through FreqCount library and will send some other values to another board through RF433 (Radiohead).
when I run the following code, then it hangs (with or without sensors connected)
if I comment one of the 2 following lines, then the code works for one or the other module. I can’t make these 2 modules working together.

  • FreqCount.begin(1000);
  • driver.send((uint8_t *)tx_buf, zize);

thanks in advance for your help !!

#include <RH_ASK.h>
#include <SPI.h> // Not actually used but needed to compile
#include <OneWire.h> // Inclusion de la librairie OneWire
#include <LiquidCrystal.h>
#include <FreqCount.h>

LiquidCrystal lcd(9,7, 11, 8, 4, 3, 2);

const float A = 22.0;
int val = 0;
int reading = 0;
int percentage = 0;
  double sum=0;
int count=0;
double Msqm;

#include <Adafruit_MLX90614.h>

Adafruit_MLX90614 mlx = Adafruit_MLX90614();
#define DS18B20 0x28     // Adresse 1-Wire du DS18B20
#define BROCHE_ONEWIRE 10 // Broche utilisée pour le bus 1-Wire
//#define LCDPIN A2 /

OneWire ds(BROCHE_ONEWIRE); // Création de l'objet OneWire ds

RH_ASK driver;

const int buttonPin1 = 6;
 int buttonState1 = 0; 
int LCDPIN = A2;
   int increment;
String  SerialDegC, infos;
char SerialDegree[3];
char valuetoprint[20];
 unsigned long time1 = 0;
   unsigned long time2 = 60000 ;

struct dataStruct{
 float temp_ciel ; 
 float temp_ambient;
 float humid;
 float temp;
 unsigned long counter;


byte tx_buf[sizeof(myData)] = {0};

// Fonction récupérant la température depuis le DS18B20
// Retourne true si tout va bien, ou false en cas d'erreur
boolean getTemperature(float *temp){
 byte data[9], addr[8];
 // data : Données lues depuis le scratchpad
 // addr : adresse du module 1-Wire détecté

 if (! { // Recherche un module 1-Wire
   ds.reset_search();    // Réinitialise la recherche de module
   return false;         // Retourne une erreur
 if (OneWire::crc8(addr, 7) != addr[7]) // Vérifie que l'adresse a été correctement reçue
   return false;                        // Si le message est corrompu on retourne une erreur

 if (addr[0] != DS18B20) // Vérifie qu'il s'agit bien d'un DS18B20
   return false;         // Si ce n'est pas le cas on retourne une erreur

 ds.reset();             // On reset le bus 1-Wire;        // On sélectionne le DS18B20
 ds.write(0x44, 1);      // On lance une prise de mesure de température
 delay(800);             // Et on attend la fin de la mesure
 ds.reset();             // On reset le bus 1-Wire;        // On sélectionne le DS18B20
 ds.write(0xBE);         // On envoie une demande de lecture du scratchpad

 for (byte i = 0; i < 9; i++) // On lit le scratchpad
   data[i] =;       // Et on stock les octets reçus
 // Calcul de la température en degré Celsius
 *temp = ((data[1] << 8) | data[0]) * 0.0625; 
 // Pas d'erreur
 return true;

void setup() {

   pinMode(buttonPin1,INPUT_PULLUP );
      digitalWrite(LCDPIN, HIGH);
 increment = 0;

   SerialDegC += char(223);           // Setup a Degrees C Serial symbol
   SerialDegC += "C";

     if (!driver.init())
        Serial.println("init failed");

   lcd.begin(16, 2);
 // Print a message to the LCD.
     lcd.setCursor(0, 0);
 lcd.print("WINCH INTERFACE");
     lcd.setCursor(0, 1);
 lcd.print("V1.0 2016");          

  double sum=0;
int count=0;


void loop() {

  time1 = millis();
if (time1 > time2) {

   digitalWrite(LCDPIN, LOW);

     if (FreqCount.available()) {
   unsigned long count =;

float temp;
 // Lit la température ambiante à  ~1Hz
 if(getTemperature(&temp)) {
   // Affiche la température
   Serial.print("Temperature : ");
   Serial.write(176); // caractère °

   myData.temp = temp;
 //MLX 6014
 Serial.print("Ambient = "); Serial.print(mlx.readAmbientTempC()); 
 Serial.print("*C\tObject = "); Serial.print(mlx.readObjectTempC());  Serial.write(176);  Serial.write('C');Serial.println();
   myData.temp_ambient = mlx.readAmbientTempC();
 //MLX 6014

  float humivalue = analogRead(A0); 
//  myData.humid=(1/humivalue)*3072; 
  myData.humid = map(humivalue, 0, 1024, 100, 0); 

   buttonState1 = digitalRead(buttonPin1);

char convert[11];
if (buttonState1 == LOW) {
 time2 = millis() + 59000;
     digitalWrite(LCDPIN, HIGH);
switch (increment) {
 case 1:
   lcd.setCursor(0, 0);
   lcd.print("Temp Sonde");
   lcd.setCursor(0, 1);
   // print the number of seconds since reset:
  // lcd.print(myData.temp);
   dtostrf(myData.temp, 5, 2, convert);
   sprintf(valuetoprint, "%s%s", convert, SerialDegree);

 case 2:
   lcd.setCursor(0, 0);
   lcd.print("Temp Ambiente");
   lcd.setCursor(0, 1);
   dtostrf(myData.temp_ambient, 5, 2, convert);
   sprintf(valuetoprint, "%s%s", convert, SerialDegree);

 case 3:
   lcd.setCursor(0, 0);
   lcd.print("Temp Ciel");
   lcd.setCursor(0, 1);
   dtostrf(myData.temp_ciel, 5, 2, convert);
   sprintf(valuetoprint, "%s%s", convert, SerialDegree);


   case 4:
   lcd.setCursor(0, 0);
   lcd.setCursor(0, 1);
   dtostrf(Msqm, 5, 2, convert);
   sprintf(valuetoprint, "%s", convert);

   increment = 0;
   lcd.setCursor(0, 0);
   lcd.print("Cliquez pour");
   lcd.setCursor(0, 1);
   // print the number of seconds since reset:
   infos = "plus d infos";


  memcpy(tx_buf, &myData, sizeof(myData) );
 byte zize=sizeof(myData);

 driver.send((uint8_t *)tx_buf, zize);



I think that you have a timer conflict.

FreqCount library uses Timer 1 and Timer 2 with the ATmega328 processors. Radiohead RH_ASK also uses Timer 1.

The Arduino mega would let you use FreqCount on Timer 3 or Timer 5 along with Timer 2.

thanks a lot for this finding. I'm not used to timer yet in arduino :slight_smile:
I will try to find another way as there's too much constraints with FreqCount comparing to my need ... (frequency will vary from 100Hz to 2kHz max (average of multiple pulsin readings should be ok)


(frequency will vary from 100Hz to 2kHz max (average of multiple pulseIn readings should be ok)

pulseIn() may very well serve your needs, but it is a “blocking” function and nothing else in the program will happen when pulseIn() is making its measurement.

Your frequencies are quite low for the processor speed of the Arduino, and you can use an interrupt driven pulse counter or frequency timer. There are lots of examples around. Some of your approach will depend on the nature of the signal you are trying to measure and the accuracy required…