Commercial Analog output LoRaWAN Controller (0-10V dc) AS923

End Devices (Nodes)
1

Hi,

I am looking for an “Off the Shelf/ Commercial” LoRaWAN device that can control a HVAC vent / damper position

The damper controller is powered, and only needs a very has a low current (10-20mA) 0-10Vdc output

Control signal Operating range DC 0 … 10 V, typical input impedance 100 kΩ

(i.e. max current draw 0.1mA at 10V)

I if the LoRawWAN controller needs external power , I could tap off the 24Vdc power of the associated Damper Controller

I would like Class C LoRaWAN capable device - Unsolicited control messages to Controller via TTN

Datasheet on damper controller:

2

You may have to settle for a digital output that is connected to a DAC.

FYI, “the LoRaWAN controller” is what we call a device or node and will certainly need power from somewhere.

TTN community edition does not support Class C at present - it is scheduled for v3 but there are no timescales for deployment yet.

3

DCH_Project

The only way I’ve achieved this is using a LoRaWAN to Modbus converter to Modbus I/O with either 0-10/4-20ma outputs. I’ve tested devices form Ursalink & Dragino they are both Class A/C devices. As Nick says TTN currently doesn’t support class C but hopefully by the summer it will be assume the no of down-links will be limited. I’ve used TTI v3 for testing and Multitech APE (LNS running in GW) for onsite Class C projects.

4

I’ve seen a LED lighting controller with 0-10V DC output

but its a 240VAC powered which is not desirable in HVAC ducts as supply is 12VDC

5

I’m looking for an off the shelf lorawan end node with an analog output 0-10V. I read here some people have seen a LE lighting controller but i’m not able to find any devices with an analog output. could someone point me in the right direction?

6

Why does the end node need an analog output, or what is the application ?

7

And into what kind of load/what current draw etc.? What resolution? Constant output or a short duration voltage pulse of variable size? Single sided (polarity) or differential? Galvanically isolated? etc. Lots of potenial ('scuse the pun!) questions wrt needs and application…simplest likely a DAC output from an existing onboard MCU (with a buffer?), per Nick 2 years back!

8

Or with more info on the electrical specs, maybe a simple PWM with RC smoothing.

But either way, two years on and I’ve not seen anything that does that off-the-shelf.

As well as the above, is this a one off or is it something you need a fair few of - if the former the simplest thing (relatively) will be to make one - if the latter, then there are people & vendors around that can help.