Get Netatmo Weather station data

Unfortunately the Netatmo node https://github.com/guidone/node-red-contrib-netatmo-dashboard is not working : Nodered crashes 5/6 times a day if you use it. The owner is not willing to maintain his code.

Here is a method to get the Netatmo Data without having to install a module, just using http requests. Here is how it works :

1. You will need to have an app created in https://dev.netatmo.com/. Login there, click on your name in upper right, chose "My apps", then create one. Once created, on the app page, there is a Token generator section. In the dropdown menu "Chose scopes", chose "Read station". Then click on Generate Token, accept. Then in the page you have the info to be entered in the node Set Netatmo Creds & Tokens : ClientID, ClientSecret, Access Toket and Refresh Token.

2. Trigger the inject node Set first info

3. Then, the inject node Start can be triggered either automatically after a deploy like I configured it (prefered method), or manually if needed

4. It will get the token, refresh token, and will refresh them after the expiration (returned in the payload by Netatmo) - 5 minutes

5. If error in getting the token it will retry after 1 hour. You can add any kind of alert (email, etc) after node Delay 1 hour on error to alert you that there is an error and token was not returned (time out etc)

6. The node Next refresh in... displays the next time the refresh will occur. This one and the associated "delay 1s" can be deleted safely if not needed

7. The token is stored in the global variable NetatmoAccessToken and is used in the http request after the inject node Get Netatmo Data.

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