# Reading problem when using the contrib-bacnet

**URL:** <https://discourse.nodered.org/t/reading-problem-when-using-the-contrib-bacnet/30478>\
**Category:** Industrial\
**Created:** [21 July 2020 13:34 UTC](https://discourse.nodered.org/t/reading-problem-when-using-the-contrib-bacnet/30478 "2020-07-21T13:34:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![vp2021](https://avatars.discourse-cdn.com/v4/letter/v/5fc32e/32.png) [@vp2021](https://discourse.nodered.org/u/vp2021)\
**Post date:** [21 July 2020 13:34 UTC](https://discourse.nodered.org/t/reading-problem-when-using-the-contrib-bacnet/30478/1 "2020-07-21T13:34:24Z")

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Hello,

I wish to use the "node-red-contrib-bacnet". In order to test it, I use a BacnNet simulator (The simulator is Room Controller Simulator and the BacNet explorer is Yabe).

 ![2020-07-21_151653](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/f/f/ff6ddf4f63fb05bce9813e4a8e9e87a6d5ed3429.jpeg)

For example, I would like to read the temperature value (21°C) shown below:  
 ![2020-07-21_151802](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/8/28f2587a52f0d91fed60319f1c79c2f0bcf29b97.jpeg)  
 ![2020-07-21_153157](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/5/d/5d9df285251aed671fdfb2062d3807ef196ab728.jpeg)

I set up my node like this:

 ![2020-07-21_151718](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/3/a/3ad6d9a3b1c56aa151290a503954afd2b4a981f9.jpeg)

If I only send a timestamp, it returns the value "17". This is the value that is contained in the PRESENT\_VALUE of an object that I'm not selected. I don't know why I receive back this value.

If on the other hand I send the information about the object I want to read to the bacnet node(see image below), I get the error below :  
 ![2020-07-21_151635](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/0/8/0886eae2fa3ca01a1f679f38a20c404379987d6c.jpeg)

However, the data I'm sending corresponds to what is described in the Node documentation.  
 ![2020-07-21_153018](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/8/3/83dce093b93e71b85120c1fbd118ea97fb714957.jpeg)

How do I get to read the PRESENT\_VALUE of the objectID: OBJECT\_ANALOG\_INPUT:0 with Node-RED? Have any of you experienced this problem before?

Thank you for your help.

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**Author:** ![JPardo](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/jpardo/32/52046_2.png) [@JPardo](https://discourse.nodered.org/u/JPardo)\
**Post date:** [18 August 2020 08:47 UTC](https://discourse.nodered.org/t/reading-problem-when-using-the-contrib-bacnet/30478/2 "2020-08-18T08:47:53Z")

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> [@vp2021](#):
>
> send a timestamp, it returns the value "17". This is the value that is contained in the PRESENT\_VALUE of an object that I'm not selected. I

Hi, can you share your detailed setting please? I have a BACnet IP device connected to Raspberry Pi and using node red. However, i cannot make it work.

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [17 October 2020 08:47 UTC](https://discourse.nodered.org/t/reading-problem-when-using-the-contrib-bacnet/30478/3 "2020-10-17T08:47:55Z")

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