ESP8266 Twitter client

This library forked from TwitterWebAPI. Existing TwitterWebAPI only works with Twitter API v1 which is not a default offering from twitter as of April 2022. So started enhancing this codebase to work with Twitter API V2 endpoints.
TODO:

• Create Tweet
• Search User
• Search Twitter
• Generic api for making V2 GET requests
• Generic api for making V2 POST requests
• Modify Examples for V2

About

An Arduino library to talk to Twitter using Twitter Web API made for ESP8266. This is based on a sketch posted here. There are other approaches like using a bearer token arduino-twitter-api, but there are limitations in terms of not being able to send tweet. This can both search/read and post tweets.

Consumer Key, Consumer Secret, Access Token & Access Token Secret

In order to talk to Twitter,

You need to create a Project, click on “New Project” in your dashboard or the Projects & Apps page within the developer portal. You’ll only be able to see this option if you haven’t already created a Project. You will be prompted to create a Project name, description, and use case. You will also be asked to create a new App or connect an existing standalone App.

• Goto https://developer.twitter.com/en/portal/dashboard and 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 (API Key) and Consumer Secret (Secret) will be under Consumer Keys section, if not click on Generate.
• Similarly, get access token and secret under Authentication tokens section.

Fill the obtained Consumer Key, Consumer Secret, Access Token and Access Token Secret inside the sketch.

Using the Library

• Download this GitHub library.
• In Arduino, Goto Sketch -> Include Library -> Add .ZIP Library... and point to the zip file downloaded.
• Install TimeLib library and NTPClient library using the same procedure.

To use in your sketch include these lines.

#include <TwitterWebAPI.h>
#include <NTPClient.h>
#include <WiFiUdp.h>

Define Twitter GET request timeout (optional, default is 1500ms)

#define TWI_TIMEOUT 2000  // in msec

Setup correct timezone to correct the time obtained from NTP server.

const char *ntp_server = "pool.ntp.org";  // time1.google.com, time.nist.gov, pool.ntp.org
int timezone = -5;                        // US Eastern timezone -05:00 HRS

You WILL need Consumer Key, Consumer Secret, Access Token and Access Token Secret that can be obtained from the above steps.

// Values below are just a placeholder
// Obtain these by creating an app @ https://apps.twitter.com/
  static char const consumer_key[]    = "gkyjeH3EF32NJfiuheuyf8623";
  static char const consumer_sec[]    = "HbY5h$N86hg5jjd987HGFsRjJcMkjLaJw44628sOh353gI3H23";
  static char const accesstoken[]     = "041657084136508135-F3BE63U4Y6b346kj6bnkdlvnjbGsd3V";
  static char const accesstoken_sec[] = "bsekjH8YT3dCWDdsgsdHUgdBiosesDgv43rknU4YY56Tj";

Declare clients before setup().

WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, ntp_server, timezone*3600, 60000);  // NTP server pool, offset (in seconds), update interval (in milliseconds)
TwitterClient tcr(timeClient, consumer_key, consumer_sec, accesstoken, accesstoken_sec);

In setup make sure to start NTP connection. A correct time is required to be able to post/search on Twitter.

tcr.startNTP();

Search for a key word

std::string search_str;
String resultJsonArray = tcr.searchTwitter(search_str);

Search Twitter User by handle name

std::string search_str;
String userJson = tcr.searchUser(search_str);

Post to Twitter

std::string twitter_post_msg;
bool status = tcr.tweet(twitter_post_msg);

Using Generic methods

Since it will be hard to implement methods with all possible combination of api specfications like different path & query params. Generic methods are introduced where you can define the path string with any required query params (just like the way you write if you were to curl).

Where do I find API specification?

1. Postman Collection On Cloud
2. OpenAPI specification
3. Postman Collection Download for local
4. Twitter API V2 documentation

// for making GET requests for V2 API, pass any path with path and query params excluding the V2 base url

// E.g: if your full url is https://api.twitter.com/2/tweets/search/recent?query=some-string-to-search, you would pass only `/tweets/search/recent?query=some-string-to-search` as parameter for the function
tcr.getV2(pathWithQueryParams std::string)  

// for making POST requests for V2 API, pass string with path and query params excluding the V2 base url and the post body

// E.g: if your full url is https://api.twitter.com/2/tweets, you would pass only `/tweets` as first parameter for the function and the body as second parameter
tcr.postV2(pathWithQueryParams std::string, bodyString std::string) 

Search recent tweets using search string

  // some-to-string-to-search is a placeholder for search string you can replace with
  TwitterClient::Response searchResponse = tcr.getV2("/tweets/search/recent?query=some-string-to-search");
  Serial.println(tweetSsearchResponseearch.respBodyString.c_str());

Post tweet

  // require the body should be escaped json as per api specification
  TwitterClient::Response searchResponse = tcr.postV2("/tweets", "{\"text\": \"Hello There!!\"}");
  Serial.println(tweetSsearchResponseearch.respBodyString.c_str());

Example: TwitterTweetSearchFSWiFiMgr

In addition to TwitterWebAPI, make sure that TimeLib library and NTPClient library is installed, and install the following libraries

• Arduino JSON
• WiFiManager

For display you can either install

• MAX7219 library or
• MD Parola & MD_Max72xx