diff --git a/esp32-mqtt-emqx.ino b/esp32-mqtt-emqx.ino
new file mode 100644
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+++ b/esp32-mqtt-emqx.ino
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+// Summer School 2022
+// ESP32 test code for MQTT protocol using
+// a free MQTT broker by emqx
+// Gerardo Marx
+#include <WiFi.h>
+#include <PubSubClient.h>
+
+// WiFi configuration
+const char *ssid = "sedeam"; // WiFi name
+const char *password = "Sede@m2025";  // WiFi password
+WiFiClient espClient;
+
+void setup(){
+  //serial communication
+  Serial.begin(115200);
+  WiFi.begin(ssid, password);
+  while(WiFi.status() != WL_CONNECTED){
+    delay(500);
+    Serial.print("Connecting to ");
+    Serial.println(ssid); 
+  }
+  Serial.println("Connection done.");
+}
+
+void loop(){
+  
+}