Added device claiming example (#6)

* add device claiming example

* update device claiming example

Author: Andry925

examples/device_claiming_pe_only.py

@@ -0,0 +1,54 @@
+# SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
+# SPDX-FileCopyrightText: Copyright (c) 2026 ThingsBoard Inc.
+#
+# SPDX-License-Identifier: Unlicense
+
+import time
+
+import wifi  # CircuitPython Wi-Fi module
+
+from tb_device_mqtt import TBDeviceMqttClient  # ThingsBoard MQTT client wrapper (your SDK)
+
+# Quick sanity-check that Wi-Fi is up before using MQTT
+print("WiFi connected:", wifi.radio.connected)
+print("IP:", wifi.radio.ipv4_address)
+
+# ThingsBoard connection settings
+HOST = "thingsboard.cloud"  # or your local TB host/IP
+PORT = 1883  # standard MQTT port (non-TLS)
+TOKEN = "YOUR_ACCESS_TOKEN"  # device access token from ThingsBoard
+
+# Claiming settings
+SECRET_KEY = "DEVICE_SECRET_KEY"  # key configured in the claiming widget
+DURATION_MS = 30000  # how long the claim request is valid (ms)
+
+client = None
+
+try:
+    # Create ThingsBoard MQTT client
+    client = TBDeviceMqttClient(host=HOST, port=PORT, access_token=TOKEN)
+
+    print("Connecting to ThingsBoard...")
+    client.connect()
+    print("Connected to ThingsBoard")
+
+    # Send claiming request
+    print("Sending claiming request...")
+    client.claim_device(secret_key=SECRET_KEY, duration_ms=DURATION_MS)
+    print("Claiming request was sent")
+
+    # Keep the script alive for the claiming window
+    # (so the device stays online while the claim is performed)
+    time.sleep(DURATION_MS)
+
+except Exception as e:
+    print("Failed to execute device claiming:", e)
+
+finally:
+    # Disconnect cleanly
+    if client is not None:
+        try:
+            client.disconnect()
+        except Exception as e:
+            print("Disconnect failed:", e)
+    print("Connection closed")