diff --git a/micropython/bluetooth/aioble/examples/temp_sensor.py b/micropython/bluetooth/aioble/examples/temp_sensor.py
index bdd8c1c5..8ab3df70 100644
--- a/micropython/bluetooth/aioble/examples/temp_sensor.py
+++ b/micropython/bluetooth/aioble/examples/temp_sensor.py
@@ -40,7 +40,7 @@ def _encode_temperature(temp_deg_c):
 async def sensor_task():
     t = 24.5
     while True:
-        temp_characteristic.write(_encode_temperature(t))
+        temp_characteristic.write(_encode_temperature(t), send_update=True)
         t += random.uniform(-0.5, 0.5)
         await asyncio.sleep_ms(1000)