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In the previous tutorial, I demonstrate the use of MQTT protocol by sending DHT sensor readings to Thingspeak as MQTT broker while the ESP32 serves as MQTT client. The act of MQTT client sending data to MQTT broker is called MQTT publish. Now in this tutorial, I will demonstrate the other direction of MQTT communication which […]
in this video, we will learn to create a basic setup of MQTT system using the ThingSpeak server and an ESP32 using MicroPython language. MQTT stands for MQ Telemetry Transport. MQ refers to the MQ series, a product develop by IBM to support the MQTT protocol.
In this article, we will learn a more complete usage of RESTful APIs which is bidirectional communication with the server that is both sending and requesting of data.
In the previous tutorial, I demonstrate using the RESTful APIs to communicate with Thingspeak server sending DHT sensor data. Now in this aticle, I will demonstrate the opposite which is requesting data from a server. This time, communicating with another server which is the OpenWeather. The receive data will be displayed on the OLED display.
REST API is one of the most popular API types. REST stands for REpresentational State Transfer which is also known as RESTful APIs. It is designed to take advantage of existing protocol. It can be used over any existing protocol, but it is typically used over HTTP when used on web applications. A RESTful API is an application program interface that uses HTTP requests to GET, PUT, POST and DELETE data.