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Hi,

just log on to your emoncms instance and go to the Input Help page:

/emoncms/input/api

On that page you'll find all the info you need to post data to your instance, single feeds, bulk import and eventually how to query them from an external app

Regards

Thanks!

There I can see different input methods. I suppose that I must do any kind of script to put this temp read into a json string. This is for the local raspi temp, but I'm quite lost (...still more) with the remote raspis.

Let's assume the raspberry you have installed emoncms on has ip address 192.168.2.1, and that you did a standard install, so you access it with this url: http://192.168.2.1/emoncms

Let's assume your write API key is cd7921341d9e2eb7b800ce8c40029068

Let's assume you have two remote raspberries, raspi1 and raspi2, and one arduino with network access

Let's assume you want to use node id 101 for raspi1, node id 102 for raspi2 and node 201 for you arduino

Let's assume on every remote node you have sensors for temperature, pressure and humidity

then feeding data into your emoncms instance will be a matter of calling these urls:

raspi1: http://192.168.2.1/emoncms/input/post.json?node=101&csv=2200,1001,86&apikey=cd7921341d9e2eb7b800ce8c40029068

raspi2: http://192.168.2.1/emoncms/input/post.json?node=102&csv=2200,1001,86&api...

arduino: http://192.168.2.1/emoncms/input/post.json?node=201&csv=2200,1001,86&api...

Once you call these URLs you will find that new inputs have been created in the inputs tab, for which you can then assign a name and create feeds

How you get you nodes to place the call to emoncms is left as an exercise for you (since I don't know what you are using to read the sensors), it could be a php script, a python, perl or bash script ... whatever

Thanks!

That's the clue I was looking for. Now I have to work in a python script to read what I need and post via json.

BYE!

Hello,

here is the code I'm using (working!):

#!/usr/bin/python
import subprocess
import time
import os
import urllib2

serverIP = "your_server_IP"
nodeID = "node_id"
apikeyRW = "your_apikey_RW"
interval = interval_in_secs

while True:
        currentTemp = subprocess.check_output(["/opt/vc/bin/vcgencmd","measure_temp"])
        currentTemp = float(currentTemp.split("=")[1][:-3])
        urllib2.urlopen("http://" + serverIP + "/emoncms/input/post.json?node=" + nodeID + "&csv=" + str(currentTemp) + "&apikey=" + apikeyRW)

        time.sleep(interval)

BYE!