Damn, I see what you mean now… I’ll check that right now and report back.
Thanks!
EDIT: That’s exactly what it was! Thank you for the tip!
Hi,
I have been researching how to setup InfluxDB and Grafana on my Openhab2 Raspberry Pi3b Stretch setup
and I came across this good read:
It wasn’t clear to me from this thread that I could install both InfluxDB and Grafana simply using the Openhab config menu
sudo openhabian-config
and select optional components.
Is there a reason this is not mentioned at the top of thread? Or to put it another way, what is best method to get InfluxDB and Grafana up and running on my Rpi3b Stretch?
I checked the link in this thread to RPi setup and it talks about Jessie. I assume for Stretch I just replace the words ‘Jessie’ with ‘Stretch’ for the correct install. Correct?
Thanks Mark.
openHABian is not the only way to install and manage an openHAB installation.
When this article was written, I don’t think openHABian supported installing InfluxDB and Grafana. I may be mistaken, but I’m not even sure there was an openHABian at that time.
The instructions are also generic enough such that should users want to host InfluxDB and Grafana on a VM or server separate from openHAB they can do it.
If you are using openHABian, use openhabian-config. If not, use the instructions above to install.
I’m pretty sure there is nothing else different between the two so that should work.
1 Like
Hello,
is there a way to outsource the infludb to a USB stick?
And if so, how can i do that?
Greetz
Daniel
Google is you friend.
Note that a USB drive is no better than an SD card. It too will wear out with enough writes.
Hey All,
A small help is needed please, a message in frontail logs keeps popping up from time to time:
2018-08-10 12:16:41.838 [ERROR] [org.influxdb.impl.BatchProcessor ] - Batch could not be sent. Data will be lost
java.lang.RuntimeException: {“error”:“timeout”}
at org.influxdb.impl.InfluxDBErrorHandler.handleError(InfluxDBErrorHandler.java:19) [205:org.openhab.persistence.influxdb:1.12.0]
at retrofit.RestAdapter$RestHandler.invoke(RestAdapter.java:242) [205:org.openhab.persistence.influxdb:1.12.0]
at org.influxdb.impl.$Proxy127.writePoints(Unknown Source) [205:org.openhab.persistence.influxdb:1.12.0]
at org.influxdb.impl.InfluxDBImpl.write(InfluxDBImpl.java:151) [205:org.openhab.persistence.influxdb:1.12.0]
at org.influxdb.impl.BatchProcessor.write(BatchProcessor.java:171) [205:org.openhab.persistence.influxdb:1.12.0]
at org.influxdb.impl.BatchProcessor$1.run(BatchProcessor.java:144) [205:org.openhab.persistence.influxdb:1.12.0]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:?]
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [?:?]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [?:?]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [?:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:?]
at java.lang.Thread.run(Thread.java:748) [?:?]
I’ve read the in this topic how to solve it and i added the "retentionPolicy=autogen"in the influxdb.cfg file the restarted the RPi but the problem still remain noting that all the functionality of Influx and Grafana are working properly.
Please advise !!
Thank you
Hey All,
Problem solved by changing the SD card, a small hint for anyone may face this issue to use a better SD card with faster through put.
Regards,
Hello,
Which seems to be the best way of updating Grafana to the latest release (v5.2.2)?
I am using iframes to embed graphs and the Grafana version (v5.1.4) that is installed with Openhabian has a bug with iframes and a vertical scroll bar.
This is fixed in latest release.
Any suggestions are welcome.
P.S. I tried:
sudo apt-get update
sudo apt-get install grafana
and it reports that the latest version is already installed…
I do not know why but the image is really tiny
Frame label="Chromecast" icon="chromecast" {
Default item=Chromecast_LG_ReleaseDate
}
Image refresh=60000 url="http://192.168.1.110:3000/render/d-solo/WF5DmCigk/a1?panelId=2&orgId=1&&from=now-48h&to=now&width=1000&height=500&tz=UTC%2B03%3A00"
Frame label="Sensors-A1" icon="temperature" {
Default item=mqtttemperature icon="temperature"
}
}
To answer my own question, Grafana now officially supports armv7 and they have the latest version available for it:)
I had to run:
wget https://s3-us-west-2.amazonaws.com/grafana-releases/release/grafana_5.2.2_armhf.deb
sudo dpkg -i grafana_5.2.2_armhf.deb
and my Grafana updated to latest stable release that has the “iframe” scrolling issue fixed.
Hi Guys,
is there a possibility to build graphs out of openHAB for forecast data. I want to build a forecast graph for a power calculatioin for the next 5 days. In openHAB I have more than one Item. My problem is that I only can persist one Item which persist the past. But I want to show the forecast. And how can I put more than one Item in a line for graphing the forecast data?
Thanks!
Thanks for this great tutorial. Its really amazing what you can do with grafana and openhab
May I suggest to add the possibility of using grafana’s kiosk mode to add your graphs as webview / frame to a dashboard to the tutorial?
I think its by far the easiest way to display your graph in HABpanel.
just add &kiosk=1 to the url of your dashboard. this will hide all of grafana’s menu items.
2 Likes
Hi, I am relatively new to Openhab but I thought I’d share something here to inspire others.
A few months ago I really didn’t know anything about Openhab, Javascript or any programming, and still don’t 
. I don’t know much about Linux either nor am I comfortable with and console commands; but nevertheless with a lot of reading and support here I achieved something I am rather pleased with. So I’d thought I’d share and say thank you.
The screen shot below is taken from Grafana but the dials also shows dynamically in Habpanel. I also have the usual plots and charts for all my room thermostats (Openwebnet binding) but here I show some nice Grafana gauges displaying the dynamic data from my Mobile-Alerts wireless rain ,wind, temperature and humidity sensors. These sensors enable a relatively inexpensive wireless weather station to be built or monitor things like garage, fridges, fish tank, pools and ponds etc. They can be found under various brand names. Discussion: mobile-alerts-and-openhab
The dial pointers are animated and move in a nice slow steady manner to their position. I get email alerts and push notifications if its very windy or it started to rain.
I did it all using Openhabian on a Raspberry Pi 3b.
I got the sensor data from the internet using a combination of Mobile-Alerts REST API query and HTML caching of the Mobile-Alerts sensor web page. Which method I used depends on the sensor type. Only the pro-sensors have the option of the REST API.
In Grafana I used the D3 Gauge panel plugin and implemented Value and Tick mapping for the wind direction gauges. The rain total gauge is, like the charts, also dynamic and adjusts its value depending on the time period selected. To achieve this I used SELECT mean, difference and cumulative sum in the metrics as the mobile-alerts data is just a running total of rain fall since the sensor was activated.
So, thank you again everyone who helped me achieve this. 
ps Just noticed an issue with the average wind direction. North directions are around 15, 0, 1 in number terms. So, when the wind is northerly and flipping between 0 and 15 results in average of 8 ie south grrr. Should work for other wind directions but North is a problem. Any ideas how to fix that would be appreciated. …Looks like I have to some maths and convert the wind angle to x and y components. Then average these x and y values and convert back to angle. I could use JavaScript to compute the x and Y using SIN and COS. Persist these values into influx and get influx to transform the average back to angle using ATAN I don’t see ATAN appearing in Grafana metrics options but there is talk of it for Influx … hmmmm.
That’s for unweighted average. For weighted then I need to factor in the speed. I think unweighted would be OK now .
Edited to add … it seems I can’t compute accurately the average wind direction due to Openhab and Influx limitations. Influx can’t do calculations with different measurements and Openhab can’t combine items into one measurement for persistence. I got most working but can’t compute the final part avgX / avgY
7 Likes
Hi
Do someone has an idea why the image is tiny?
Can’t you create a new Item populated with a Rule? That’s the standard approach.
Often you can also put all the measurements into a Group using
Group:Number:AVG Measurements
The state of Measurements will be the average of all its members. You can then persist Measurements to InfluxDB and chart it normally.
1 Like
Rich, I am often coming across your good ideas. That to me sounds like another one 
Having thought about it I don’t think that’s going to work. 
I will explain the problem in more detail.
Ignoring wind speed weighting for now, the way to calculate average wind direction is not to use angles but to break down the wind direction into its component W_E and N-S directions, ie +/- X and +/- Y and then average these. This avoids the problem of for example 0 and 359 degrees both North averaging to 180 ie South. With the average X and Y dynamically calculated I would then need to convert them back into a final average wind direction like this:
atan ( avgX / avgY )
The averages are the dynamically calculated ones that Influx can do. I don’t think that Openhab group Items average is going to work in this case. Influx can also perform the atan function, I tested it, but it can’t divide X measurements by Y measurements. And I can’t get Openhab to persist the x and Y components as one measurement set as Influx fields, tags which could have solved the Influx divide problem. (This part I am learning so I could be wrong)
Thanks to your help elsewhere with type conversations, which I always struggle with, I got the code below to update Items with the latest X and Y wind direction components, and then persist these to Influx.I tried to get Influx to do the finally conversion back to an angle but as expected it didn’t work.
In my case the wind direction angle is in 22.5 degree steps from 0 to 15
logInfo("Mobile Alerts" , ' direction number = '+ MobileAlertsWeatherStationWindDirectionNumber.state)
val Number wdn = MobileAlertsWeatherStationWindDirectionNumber.state.as Number
logInfo("Mobile Alerts" , ' wdn = '+ wdn)
val radians = Math.toRadians(22.5 * wdn.doubleValue)
val wdx = Math.sin(radians)
val wdy = Math.cos(radians)
MobileAlertsWeathStationWindDirectionX.sendCommand(wdx)
MobileAlertsWeathStationWindDirectionY.sendCommand(wdy)
The average wind direction gauge is just a bit of fun. I like to see the animation of the dial pointers moving slowly into place The chart below is actually a more informative way to display what the wind has been doing. You can easily see the wind changed to a general new direction or if its just random gusts. You can also see the 0,360 problem as the data appears to split but actually is the same wind direction.
Probably not if you need to handle special cases. So you will need a Rule to calculate the average and put the result in an Item that gets stored in persistence.
I am not sure if someone has posted this before, but i find this i a very handy tool to work with Grafana.
Just to easily drop some series or check data for some minutes it works fine for me.
4 Likes