Read NetAtmo weather station data via Script

Update (2019-03-14): Netatmo changed their login process on Mar 7th 2019 – the script below is the updated version also using the new getstationsdata API endpoint.

Based on the feedback for my previous blog post Export NetAtmo weather station data to CSV / Excel I created a small script to get the module, device ID, temperature, humidity and also all sensor data from your NetAtmo weather station and modules.

This scripts also uses curl to login to the web page and then download the device data using the NetAtmo Web API. This script will return all the information in JSON format.

#!/bin/bash

listDevices() {
	# ------------------------------------------------------
	# Help
	# ------------------------------------------------------
	# usage: listdevices <USER> <PASSWORD>
	#
	# USER + PASSWORD -> your NetAtmo Website login

	# ------------------------------------------------------
	# Parsing Arguments
	# ------------------------------------------------------
	USER=$1
	PASS=$2


	# ------------------------------------------------------
	# Define some constants
	# ------------------------------------------------------
	URL_LOGIN="https://auth.netatmo.com/en-us/access/login"
	URL_POSTLOGIN="https://auth.netatmo.com/access/postlogin"
	API_GETMEASURECSV="https://api.netatmo.com/api/getstationsdata"
	SESSION_COOKIE="cookie_sess.txt"
 
 
	# ------------------------------------------------------
	# URL encode the user entered parameters
	# ------------------------------------------------------
	USER="$(urlencode $USER)"
	PASS="$(urlencode $PASS)"
 
 
	# ------------------------------------------------------
	# Now let's fetch the data
	# ------------------------------------------------------
 
	# get token from hidden <input> field
	TOKEN="$(curl --silent -c $SESSION_COOKIE $URL_LOGIN | sed -n '/token/s/.*name="_token"\s\+value="\([^"]\+\).*/\1/p')"

	# and now we can login using cookie, id, user and password
	curl --silent -d "_token=$TOKEN&email=$USER&password=$PASS" -b $SESSION_COOKIE -c $SESSION_COOKIE $URL_POSTLOGIN > /dev/null

	# next we extract the access_token from the session cookie
	ACCESS_TOKEN="$(cat $SESSION_COOKIE | grep netatmocomaccess_token | cut -f7)"
 
	# build the POST data
	PARAM="access_token=$ACCESS_TOKEN"
 
	# now download json data
	curl -d $PARAM $API_GETMEASURECSV
 
	# clean up
	rm $SESSION_COOKIE
}

#____________________________________________________________________________________________________________________________________

urlencode() {
	# ------------------------------------------------------
	# urlencode function from mrubin
	# https://gist.github.com/mrubin
	#
	# usage: urlencode <string>
	# ------------------------------------------------------
	local length="${#1}"

	for (( i = 0; i < length; i++ )); do
		local c="${1:i:1}"

		case $c in [a-zA-Z0-9.~_-])
			printf "$c" ;;
			*) printf '%%%02X' "'$c"
			esac
	done
}

#____________________________________________________________________________________________________________________________________

listDevices "user@email.com" "mySecretPassword"

When you execute the script above you should see all your NetAtmo module details in a JSON format – unfortunately this is not easy to read:

Therefore I used JQ – which is a great JSON parser to make it human-readable. I just piped the output of my script straight into JQ:

./ListDevices.sh  | ./jq

… and viola I got a proper formatted JSON file containing all data:

This JSON output contains the module_id (referred as _ID), and all other sensor data, such as temperature, humidity, battery level, etc.