up device id for BLE device name

main.py

@@ -2,7 +2,7 @@
 # OLT protocol.
 # Tomas Krejci [Njord]
 
-import machine, time
+import machine, time, re
 from sys import platform
 
 ESP32 = platform == "esp32"
@@ -14,10 +14,14 @@ else:
     from pyb import Pin, LED
 import uasyncio as asyncio
 
-device_id = ""
+#### Device ID ###
+device_id_str = ""
 for b in machine.unique_id():
-    device_id += "{:02X}".format(b)
-# device_id_hex = int(device_id)
+    device_id_str += "{:02X}".format(b)
+
+device_id_str = device_id_str[-4:]  # Keep last 8 char
+device_id = int(device_id_str, 16)  # Convert to int from hex in string
+# device_id_str = str(device_id, 16)  # Convert back to hex print(f"{device_id:0x}")
 
 #### BLE UART  ###
 import ble_uart
@@ -30,7 +34,7 @@ def print_handler():
 
 
 ble = bluetooth.BLE()
-uart = ble_uart.Ble_uart(ble, on_rx=print_handler, name=print("LaserTag"))
+uart = ble_uart.Ble_uart(ble, on_rx=print_handler, name="OpenLaserTag " + device_id_str)
 
 #### OLT IR RX imports ###
 import ustruct
@@ -155,7 +159,7 @@ async def cb(byte1, byte2, byte3, packet):
 async def main(proto):
     logger.debug("main start")
 
-    print(f"Device ID: {device_id}")
+    print(f"Device ID: {device_id_str}")
 
     ### alive check ###
     asyncio.create_task(alive_check())