DEPRACATED in favor of new library I am working on

https://github.com/witnessmenow/TweESP32

arduino-twitter-api

A wrapper for the Twitter API for Arduino (works on ESP8266)

In the api FAQ twitter mentions that they do not expire bearer tokens, so once you do not generate a new one with the same Credentials it should continue working

Getting API Key & Secret

• Go to the following URL - sign in if you havent already.
• Fill in the fields, For website you can enter any webpage (e.g. http://google.com), and create your app
• Then click on the Keys & Tokens tab. Your Consumer Key and Consumer Secret will be there.

Getting Bearer Token

I am hoping to make this a little more simple going forward, as we should be able to do this on the board directly, but here they are for now :)

• Get curl on your machine (Windows: try this it shoud already be installed on mac and linux)
• Make the following request using the key and token from the above section

curl -u "CONSUMER_KEY:CONSUMER_SECRET" --data 'grant_type=client_credentials' 'https://api.twitter.com/oauth2/token'

• The response will contain a bearer token (it is the big long one!), use this with the setBearerToken as shown in the example.