[OpenTRV-dev] opentrv to emoncms

[Bo Herrmannsen]

let my brain brew for a sec

but yes the pi that runs oem could prob be the better chioce.

and then one of the 2 opentrv's i have in the livingroom could be the
gateway.... only thing i will need to make that happen are a ftdi cable and
then extend the serial connection



2015-05-07 16:07 GMT+02:00 Aideen McConville <aideen at amcc.myzen.co.uk>:

> Hi Bo,
>
>
>
> I too am interested in collecting data from OpenTRV, OpenEnergyMonitor
> (oem) and other sensors and wrangling it as required (e.g. sending to
> emonCMS and other possible stores/dashboards).
>
>
>
> Rather than modify (and complexify!) the code in individual sensor nodes,
> I am planning to use a central node to receive, store and forward data
> (e.g. using MQTT and Node-Red). It's fairly easy to send data from any
> sensor to emonCMS using oem's input API and the same techniques can be
> useful for the oem sensors themselves (emonTx and emonTH). I can provide a
> simple Perl example on request (sends Currentcost energy meter serial data
> to emonCMS).
>
>
>
> One OpenTRV unit could act as an interim (RFMxx) gateway - listening for
> data from other "busier" units and forwarding it to the main gateway (e.g.
> via a FTDI - USB link to a mini wireless router or Raspberry Pi).
>
>
>
> I currently have one OpenTRV Rev2 board (r4111) talking to a Conrad valve
> drive. It is connected to, and powered by, the USB port of a micro TP-Link
> router via FTDI (same USB BUB as used to talk to Jeenodes and oem units).
> The TP-Link router is running OpenWRT (embedded Linux) and has some USB
> tools and the Mosquitto client software installed (further details on
> request). A Raspberry Pi would work just as well.
>
>
>
> To "see" the serial data from the OpenTRV board, I just need to logon to
> the router and type:
>
>
>
> # stty -F /dev/ttyUSB0 4800 raw -echo
>
>
>
> # cat < /dev/ttyUSB0
>
>
>
> A further step: to remove the ">" lines from the output and pass the rest
> on to a Mosquitto broker (running elsewhere on the network):
>
>
>
> # awk 'NF > 1' /dev/ttyUSB0 | mosquitto_pub -l -h 192.168.1.112 -t
> 'house/opentrv/lab'
>
>
>
> I can then see the data on a beefier linux box (one with a hard drive!)
> running the broker:
>
>
>
> $ mosquitto_sub -t 'house/#'
>
> :
>
> FHT8V TX
>
> =F0%@20C4;T6 1 W255 0 F255 0 W255 0 F255 0;S12 12 21;HC18
> 11;{"@":"120b","L":235,"B|mV":3332,"occ|%":0,"vC|%":0}
>
> FHT8V TX
>
> FHT8V TX
>
> =F0%@20C5;T6 5 W255 0 F255 0 W255 0 F255 0;S12 12 21;HC18
> 11;{"@":"120b","L":234,"B|mV":3332,"occ|%":0,"vC|%":0}
>
> FHT8V TX
>
> =F0%@20C5;T6 9 W255 0 F255 0 W255 0 F255 0;S12 12 21;HC18
> 11;{"@":"120b","L":234,"B|mV":3332,"occ|%":0,"vC|%":0}
>
> FHT8V TX
>
> FHT8V TX
>
> :
>
>
>
> Not sure if this helps with your quest, but if any particlar details are
> of interest, let me know.
>
>
>
> Aideen
>
>
>
> *From:* opentrv-dev-bounces at lists.opentrv.org.uk [mailto:
> opentrv-dev-bounces at lists.opentrv.org.uk] *On Behalf Of *Bo Herrmannsen
> *Sent:* 05 May 2015 12:11
> *To:* Closed list for developer discussions
> *Subject:* [OpenTRV-dev] opentrv to emoncms
>
>
>
> hi again
>
>
>
> i'm going to fiddle with my bed-roller server box and i wanted to add data
> from the OpenTRV units
>
>
>
>
>
> 2 ways i can think of it
>
>
>
>
>
> 1) Each Opentrv board sends the data to emoncms... they at least work on
> the same freq, but they dont use the same module,... latest rfm lib that
> emontx boards use are updated to be able to use rfm69 but i think their
> boards are still shipped with rfm12 or was it  22....
>
>
>
> anyways my idea was to send commands to the valve, then to emoncms... then
> sleep for the 2 mins or so
>
>
>
>
>
> 2) have one emontx board grap the data it needs from one Opentrv board
> that again wireless gets data from the others.... i have 2 emontx boards
> and one opentrv at my hot water cylinder...
>
>
>
> one of the emontx boards allready gets data from the heatmeter via an IR
> optical serial port
>
>
>
> the other one only monitors my water meter so most of the time it will
> just sit there idle and just report 0 water usage to the emoncms system...
> i think this one will be mostly suited
>
>
>
> right now that board only sends over 2 numbers
>
>
>
> 1) liters an hour
>
> 2) clicks since last reading (liters)
>
>
>
> it reports to emoncms every 4 sec
>
>
>
> so for each opentrv i just need to collect and add:
>
>
>
> 1)battery voltage
>
> 2)temp
>
> 3)light level
>
> 4)valve open %
>
>
>
> i have attached 2 files... one for each of the emontx boards
>
>
>
> the small file is the one for the water meter and the other is for the
> heatmeater, electricity pulse, and hotwater temp...
>
>
>
> my idea is to add something to the watermeter skecth that can grab serial
> data and pick what is needed... i just dont have any clue how.. also the
> serial data from the opentrv must be in the same order or the emontx will
> start to report false data.... maybe have the opentrv buffer the data and
> just update the output when new values are there?
>
>
>
> anyone have idea or could help out?
>
>
>
> the zip file is the sketch for my opentrv that controls the hot water
>
>
>
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>
>
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