diff --git a/.vscode/settings.json b/.vscode/settings.json
index 7668934..088aae0 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,5 +1,7 @@
 {
     "files.associations": {
-        "stdio_usb.h": "c"
+        "stdio_usb.h": "c",
+        "error.h": "c",
+        "messagerie.h": "c"
     }
 }
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7925527..7b5e62c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,9 @@ set(PICO_EXAMPLES_PATH ${PROJECT_SOURCE_DIR})
 pico_sdk_init()
 
 add_executable(Modele_RPiPico
+  communication.c
   main.c
+  messagerie.c
 )
 
 target_link_libraries(Modele_RPiPico
diff --git a/main.c b/main.c
index c8a21ae..8bba1ac 100644
--- a/main.c
+++ b/main.c
@@ -5,13 +5,18 @@
 */
 #include "pico/stdlib.h"
 #include <stdio.h>
+#include <string.h>
+#include "communication.h"
+#include "messagerie.h"
 
 void stdio_usb_out_chars(const char *buf, int length);
 
 #define NB_MORCEAUX 100
 
 absolute_time_t envoie_nb_char(int nb_char);
-char message[10000];
+char chaine_envoie[10000];
+
+
 
 void envoie_donnees(char * donnees, u_int16_t length){
 	for (int i=0; i<length; i++){
@@ -19,12 +24,47 @@ void envoie_donnees(char * donnees, u_int16_t length){
 	}
 }
 
+    
+void envoie_structure(const void * donnees, size_t size){
+	const unsigned char *byte;
+	for ( byte = donnees; size--; ++byte )                                     
+	{   
+		printf("%02X ", *byte);
+	}   
+	putchar('\n');
+}
 
 void main(void)
 {
 	absolute_time_t measured_time_us;
 	absolute_time_t temps_moyen, temps_max, temps_m[NB_MORCEAUX];
 	absolute_time_t current_time_us, start_time_us;
+	absolute_time_t temps_message_detection;
+	struct message_t message;
+	struct message_requete_t message_requete_detection;
+	unsigned char message_binaire[100];
+	unsigned char message_requete_detection[10];
+
+	message_requete_detection.type = 'r';
+	message_requete_detection.id_carte = 'D';
+	message_requete_detection.adresse_registre = 0;
+	message_requete_detection.taille_donnees = 19;
+	message_requete_detection.fin_de_message = 0;
+	
+
+	message_binaire[0]='r';
+	message_binaire[1]='A';
+	message_binaire[2]= 0;
+	message_binaire[3]= 5;
+
+	message_binaire[4]= 'a';
+	message_binaire[5]= 'b';
+	message_binaire[6]= 'c';
+	message_binaire[7]= 'd';
+	message_binaire[8]= 'e';
+
+	message_binaire[9]= 0;
+
 
 	
 	for(int i=0; i<10000; i++){
@@ -32,30 +72,51 @@ void main(void)
 		if(j>25){
 			j=0;
 		}
-		message[i]= j + 'a';*/
-		message[i]= i%26 + 'a';
+		chaine_envoie[i]= j + 'a';*/
+		chaine_envoie[i]= i%26 + 'a';
 	}
 	int nb_ech = 10;
 	int taille_morceau = 60;
 	stdio_init_all();
-	while(1){
-		temps_moyen = 0;
-		temps_max = 0;
-		for(int i = 1; i < NB_MORCEAUX; i++){
-			temps_moyen = 0;
-			temps_max = 0;
-			start_time_us = get_absolute_time();
-			temps_m[i] = envoie_nb_char(taille_morceau);
-			//temps_m[i] = i;
-			current_time_us = get_absolute_time();
-			sleep_ms(1);
-		}
-		for(int i = 1; i < NB_MORCEAUX; i++){
-			printf(">temps:%d:%lld#us\n", i, temps_m[i]);
-		}
-		printf(">temps_d:%lld\n", current_time_us - start_time_us);
+	gpio_init(PICO_DEFAULT_LED_PIN);
+	gpio_set_dir(PICO_DEFAULT_LED_PIN, GPIO_OUT);
+	gpio_put(PICO_DEFAULT_LED_PIN, 0);
 
+	temps_message_detection = get_absolute_time();
+
+	while(1){
+
+		if(get_absolute_time() - temps_message_detection > MESSAGE_TIMEOUT_US){
+			envoie_structure(&message_requete_detection, sizeof(message_requete_detection) );
+			temps_message_detection = get_absolute_time();
+		}
+
+		start_time_us = get_absolute_time();
+		envoie_donnees(message_binaire, 10);
+		current_time_us = get_absolute_time();
+		printf(">temps:%lld\n", current_time_us - start_time_us);
+
+		start_time_us = get_absolute_time();
+		communication_reception_message();
+		while(messagerie_message_disponible()){
+			message = messagerie_get_message();
+			if(message.type == 'r'){
+				if(message.id_carte == 'D'){
+					if(message.donnees[1] > 0 && message.donnees[1] < 30){
+						gpio_put(PICO_DEFAULT_LED_PIN, 1);
+					}else{
+						gpio_put(PICO_DEFAULT_LED_PIN, 0);
+					}
+				}
+			}
+		}
+		current_time_us = get_absolute_time();
+
+		putchar('\n');
+		printf(">temps:%lld\n", current_time_us - start_time_us);
 		sleep_ms(50);
+
+
 	}
 }
 
@@ -66,14 +127,14 @@ absolute_time_t envoie_nb_char(int nb_char) {
 	if (nb_char == 0){
 		return 0;
 	}
-	message[nb_char - 1] = '\n';
-	message[nb_char] = '\0';
+	chaine_envoie[nb_char - 1] = '\n';
+	chaine_envoie[nb_char] = '\0';
 	start_time_us = get_absolute_time();
-	printf("%s", message);	
-	envoie_donnees(message, strlen(message));
+	printf("%s", chaine_envoie);	
+	envoie_donnees(chaine_envoie, strlen(chaine_envoie));
 
 	current_time_us = get_absolute_time();
-	message[nb_char - 1] = 'a';
-	message[nb_char] = 'a';
+	chaine_envoie[nb_char - 1] = 'a';
+	chaine_envoie[nb_char] = 'a';
 	return current_time_us - start_time_us;
 }