diff --git a/picow_access_point.c b/picow_access_point.c
index 08f4c79..cb4265a 100644
--- a/picow_access_point.c
+++ b/picow_access_point.c
@@ -87,6 +87,17 @@ void run_udp_beacon() {
     }
 }
 
+void udp_receive_callback(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port){
+    printf("UDP callback !\n");
+    printf("IP: %d.%d.%d.%d, port %d\n", (addr->addr >>24) & 0xFF, (addr->addr >>16) & 0xFF, (addr->addr >>8) & 0xFF, addr->addr & 0xFF, port);
+    printf("Taille:%d\n", p->len);
+    printf("Contenu: ");
+    for(int i=0; i < p->len; i++){
+        printf("%c", ((char*)p->payload)[i]);
+    }
+    printf("\n");
+}
+
 static err_t tcp_close_client_connection(TCP_CONNECT_STATE_T *con_state, struct tcp_pcb *client_pcb, err_t close_err) {
     if (client_pcb) {
         assert(con_state && con_state->pcb == client_pcb);
@@ -328,6 +339,8 @@ void key_pressed_func(void *param) {
 int main() {
     stdio_init_all();
 
+    sleep_ms(4000);
+
     TCP_SERVER_T *state = calloc(1, sizeof(TCP_SERVER_T));
     if (!state) {
         DEBUG_printf("failed to allocate state\n");
@@ -371,6 +384,17 @@ int main() {
     dns_server_t dns_server;
     dns_server_init(&dns_server, &state->gw);
 
+    // UDP Callback
+    struct udp_pcb * udp_pcd_received = udp_new();
+    err_t err = udp_bind(udp_pcd_received, IP_ADDR_ANY, 4444);
+    if(err != ERR_OK){
+        printf("udb_bind err = %d\n", err);
+    }else{
+        printf("udb_bind ok\n");
+    }
+    
+    udp_recv(udp_pcd_received, udp_receive_callback, NULL);
+
     if (!tcp_server_open(state, ap_name)) {
         DEBUG_printf("failed to open server\n");
         return 1;