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);
}