Thanks a lot, It works!!!

Here my code updated

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

// Enable and select radio type attached
#define MY_RADIO_NRF24

//#define MY_NODE_ID 7

#include <MySensors.h>

#define BARO_CHILD 0
#define BAR_SENSOR_ANALOG_PIN 0

unsigned long SLEEP_TIME = 60000;

MyMessage pressureMsg(BARO_CHILD, V_PRESSURE);
void setup(){
  
}

void presentation() {
  sendSketchInfo("pressure Sensor", "1.0");
  present(BARO_CHILD, S_BARO);
}

void loop() {
    
  int lecture_adc = analogRead(BAR_SENSOR_ANALOG_PIN);
  float pression = ((lecture_adc*5/1024.0)-0.50)/1.7;
  Serial.println(pression);        
  send(pressureMsg.set(pression, 2));
        
  sleep(SLEEP_TIME);
}