# Ademco NuTech AD2USB flow - no data

**URL:** <https://discourse.nodered.org/t/ademco-nutech-ad2usb-flow-no-data/38492>\
**Category:** Hardware\
**Created:** [4 January 2021 03:46 UTC](https://discourse.nodered.org/t/ademco-nutech-ad2usb-flow-no-data/38492 "2021-01-04T03:46:12Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![PPz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ppz/32/15429_2.png) [@PPz](https://discourse.nodered.org/u/PPz)\
**Post date:** [4 January 2021 03:46 UTC](https://discourse.nodered.org/t/ademco-nutech-ad2usb-flow-no-data/38492/1 "2021-01-04T03:46:12Z")

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I installed a flow to obtain data from a nuTech Ad2USB unit, connected to a serial port:

> **[node-red-node-ademco](https://flows.nodered.org/node/node-red-node-ademco)**
>
> A Node-RED node to Parse Ademco Panel Messages.

I had in the beginning some serial read errors because the Nutech software was looking on the port to provide the interface to control the ademco panel. This is solved.

 ![ademco ad2usb node-red flow](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/2/c/2c5bb989dfcd5059142a8a7e5210cdc8e676f7f8.jpeg)

But I have absolutely no data coming from the serial (debug is empty, nothing to parse), whatever I do with the alarm (arm, disarm, check, etc)

Am I forgetting something basic here ?

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [4 January 2021 09:10 UTC](https://discourse.nodered.org/t/ademco-nutech-ad2usb-flow-no-data/38492/2 "2021-01-04T09:10:34Z")

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Is anything actually coming out of the serial port into those nodes ?

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<div class="post-metadata">

**Author:** ![PPz](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/ppz/32/15429_2.png) [@PPz](https://discourse.nodered.org/u/PPz)\
**Post date:** [5 January 2021 02:40 UTC](https://discourse.nodered.org/t/ademco-nutech-ad2usb-flow-no-data/38492/3 "2021-01-05T02:40:14Z")

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In fact no, but should I send something to receive an answer ?

I receive (in other serial communication, in fact serial to modbus 485) info from a modbus device, without doing anything: I harvest the serial-modbus, parse the data and use them accordingly.

But maybe I'm fooled by the serial-rs485 behavior and I missed that I need to send (what ?) strings to the serial (then ad2usb them ademco) to obtain an answer.? I was genuily thinking that playing with the ademco system (arm/disarm) will push data to ad2usb and serial port, but no luck.

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [5 January 2021 09:25 UTC](https://discourse.nodered.org/t/ademco-nutech-ad2usb-flow-no-data/38492/4 "2021-01-05T09:25:02Z")

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Well the serial in node will only show data that arrives at it - so the remote system must send something to start things off. How that happens is down to that remote system. I guess yes you may need to send it something in order to get it to respond - in which case maybe a serial request node would be better - and then inject some message or other - I have no idea what this ademco is so can't help on that side I'm afraid.

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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:** [6 March 2021 09:25 UTC](https://discourse.nodered.org/t/ademco-nutech-ad2usb-flow-no-data/38492/5 "2021-03-06T09:25:04Z")

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Closed on 6 March 2021 09:25 UTC

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