Howto feed data from my inverter to local emoncms

Submitted by Guest on Mon, 04/02/2013 - 19:32

I have a Solutronic PV-inverter that i collect data from via a small shell script on my RPi. I would like to feed these data into my local emonCMS on the RPi.

I am currently feeding the data to PVoutput.org from a shell script via a curl string like:

curl -d "d=`date '+%Y%m%d'`" -d "t=`date '+%H:%M'`" \
 -d "v1=$eg1" -d "v2=$pg1" -d "v6=$udc" \
 -H "X-Pvoutput-Apikey: xxxxxxxxxxxxxxxxxxyyyyyyyyyyyzzzzzzzzzzz" \
 -H "X-Pvoutput-SystemId: 4950" http://pvoutput.org/service/r2/addstatus.jsp

$eg1 is energy today until now
$pg1 is power generated
$udc is dc voltage.

The script is run every 5 mins from cron to update pvoutput.org with live data.

I have seached on this site but can't find definitions on how i could use a similar curl (or other) string from a shell script to feed the same data into my local emonCMS. Anyone that can point me i the right direction.

Re: Howto feed data from my inverter to local emoncms

Submitted by jensk (not verified) on Wed, 06/02/2013 - 07:23.

Read the wrong documentation - it was for emoncms version 2. That's why I could not get it to work.

I have got it right now and data is parsed to emoncms through this bash string:

curl "http://<ip-adress-of-emoncms>/emoncms/inout/post?json{<emoncms-input-
variable>:<bash-variable>}&apikey=<emoncms-api-key>"

Re: Howto feed data from my inverter to local emoncms

Submitted by TrystanLea on Wed, 06/02/2013 - 09:42.

Excellent good work, good to see it used this way, Im working on improving the documentation so hopefully things should be clearer in the future

Re: Howto feed data from my inverter to local emoncms

Submitted by jensk (not verified) on Wed, 06/02/2013 - 16:39.

Yes it is nice to get everything working even for a arduino newbie like me. Right now i have one Funky sensor delivering temp data to my RFM12Pi and my solar data is injected via curl from my bash script.

Thank you for a good emoncms

Re: Howto feed data from my inverter to local emoncms

Submitted by allmac on Wed, 20/01/2016 - 22:09.

I send some data to Emoncms using shell script and MQTT.

SAMPLE (Emoncms server Raspberry-Pi data):

#!/bin/bash

declare -a mem
mem=$(free -m | grep -n 'Me' | awk '{ print $2","$3","$4","$5","$6 }')
GPU_temp=$(($(cat /sys/class/thermal/thermal_zone0/temp)/1000))
CPU_temp=$(/opt/vc/bin/vcgencmd measure_temp | cut -d "=" -f2 | cut -d "'" -f1)
CPU_usage=$(top -bn2 | grep "Cpu(s)" | tail -1 | cut -c36-40 | sed 's/,/./' | xargs)

dados=$(printf "%s,%s,%s,%s" "$mem" "$GPU_temp" "$CPU_temp" "$CPU_usage")

mosquitto_pub -h 192.168.1.11 -t emonhub/rx/12/values -m "$dados"
mosquitto_pub -h 192.168.1.11 -t emonhub/tx/12/values -m "$dados"

RX goes to NODES
TX goes to INPUT/Feeds (I did a hacked version of EmonHubMqttInterfacer to do this directly)

Re: Howto feed data from my inverter to local emoncms

Submitted by pseudoruprecht on Thu, 21/01/2016 - 09:56.

You might want to give Node-RED a try, now that it's included in the latest Image [1] and the Raspbian Jessie repositories. There's a first glimpse at what can be achieved at [2].

Together with the Johnny5-node from [3], driving an Arduino (via Firmata) is straightforward.

[1] http://openenergymonitor.org/emon/node/11799

[2] http://openenergymonitor.blogspot.de/2015/10/emonpi-nodered-and-mqtt.html

[3] http://flows.nodered.org/node/node-red-contrib-gpio

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