diff --git a/rpi/main.py b/rpi/main.py
index 98625534..eb500f77 100644
--- a/rpi/main.py
+++ b/rpi/main.py
@@ -7,9 +7,9 @@ from services.mqtt_service import MQTTService
 screen = Screen()
 service = MQTTService("127.0.0.1", 1883)
 
-def publish(uid : int) :
-    screen.displayMessage(str(uid))
-    service.publish("app", "/board-mate/rfid/scan", str(uid), 0)
+def publish(chip_id : int) :
+    screen.displayMessage(str(chip_id))
+    service.publish("app", "/board-mate/rfid/scan", str(chip_id), 0)
 
 if __name__ == "__main__":
     screen.enableBackground()
diff --git a/rpi/services/mqtt_service.py b/rpi/services/mqtt_service.py
index a69525e9..ffcb2530 100644
--- a/rpi/services/mqtt_service.py
+++ b/rpi/services/mqtt_service.py
@@ -9,16 +9,15 @@ class MQTTService:
         self.address = address
         self.port = port
 
-    def publish(self, client_id: str, topic: str, message: str, qos: int = 0):
+    def publish(self, client_id: str, topic: str, data: str, qos: int = 0):
         client = mqtt.Client(client_id=client_id)
         try:
             client.connect(self.address, self.port)
             client.loop_start()
-            data = str(message).encode()
 
             payload = {
                 "timestamp": int(time.time()),
-                "data": base64.b64encode(data).decode('utf-8')
+                "data": data
             }
             result = client.publish(topic, json.dumps(payload), qos=qos)
             result.wait_for_publish()