# Dragino LHT65N-PIR reports wrong external sensor

**URL:** <https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734>\
**Category:** Dragino\
**Tags:** dragino, end-devices\
**Created:** [July 25, 2024, 9:11am UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734 "2024-07-25T09:11:17Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![matlora](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/m/9fc29f/32.png) [@matlora](https://www.thethingsnetwork.org/forum/u/matlora)\
**Post date:** [July 25, 2024, 9:11am UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734/1 "2024-07-25T09:11:18Z")

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Dragino LHT65N-PIR, firmware 1.4.1, _thinks_ it has external temperature probe attached.  
The response to a downlink “26 01”, FPort=5 is:  
**0B** 0141 01 FF 0C16  
0B → Temperature probe, it should be **1A**  
The external sensor is not a temperature probe but a PIR probe.  
How does one configure proper device type using downlink command?

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**Author:** ![Jeff-UK](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jeff-uk/32/35697_2.png) [@Jeff-UK](https://www.thethingsnetwork.org/forum/u/Jeff-UK)\
**Post date:** [July 25, 2024, 10:01am UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734/2 "2024-07-25T10:01:55Z")

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Have you contacted Dragino support? That should be 1st step if default behaviour of the firmware is incorrect (or their documentation wrong/not reflecting reality).

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**Author:** ![matlora](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/m/9fc29f/32.png) [@matlora](https://www.thethingsnetwork.org/forum/u/matlora)\
**Post date:** [July 28, 2024, 7:19am UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734/3 "2024-07-28T07:19:16Z")

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Well, I have, no response in 3 days…

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**Author:** ![stevencellist](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/stevencellist/32/46434_2.png) [@stevencellist](https://www.thethingsnetwork.org/forum/u/stevencellist)\
**Post date:** [July 28, 2024, 8:24am UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734/4 "2024-07-28T08:24:40Z")

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Not much of a surprise given that two of those three days were during the weekend.

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**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\
**Post date:** [July 28, 2024, 9:49am UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734/5 "2024-07-28T09:49:10Z")

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We have the same manuals tomorrow with that you can find on the Dragino website so don’t expect miracles. You could try the downlink commands provided in [the generic lht65n](http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LHT65N%20LoRaWAN%20Temperature%20%26%20Humidity%20Sensor%20Manual/#H2.4.6Extvalue) manual (command 0xa2) but that might mess up things even more so use at your own risk.

As your device clearly does not work as intended you could also contact the seller and ask them for a solution.

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**Author:** ![matlora](https://www.thethingsnetwork.org/forum/letter_avatar_proxy/v4/letter/m/9fc29f/32.png) [@matlora](https://www.thethingsnetwork.org/forum/u/matlora)\
**Post date:** [September 18, 2024, 12:42pm UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734/6 "2024-09-18T12:42:27Z")

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In case someone else will have this problem…  
Send a Downlink to Port 5 with payload: 0x A2 0E.  
Then the device will know that the external sensor is PIR, not temperature.

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**Author:** ![system](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/6/2/6250ea44fd2b0d6259489e1a92748df681e1f970.png) [@system](https://www.thethingsnetwork.org/forum/u/system)\
**Post date:** [September 19, 2024, 12:42pm UTC](https://www.thethingsnetwork.org/forum/t/dragino-lht65n-pir-reports-wrong-external-sensor/68734/7 "2024-09-19T12:42:29Z")

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