The objective of this post is to explain how to parse simple JSON Arrays on the ESP8266, using the ArduinoJson library. Introduction In this post, we will create a simple program to parse a JSON string that includes an array of integers. We assume that the ESP8266 libraries for the Arduino IDE were previously installed. …
ESP8266: Parsing JSON
Introduction In this post, we will create a simple program to parse a JSON string simulating data from a sensor and print it to the serial port. We assume that the ESP8266 libraries for the Arduino IDE were previously installed. You can check how to do it here. In order to avoid having to manually decode …
ESP8266: HTTP POST Requests
How to perform HTTP POST requests from the ESP8266 using the Arduino core
ESP8266: HTTP GET Requests
How to perform HTTP GET requests from the ESP8266 using the Arduino core
ESP8266: Connecting to a WiFi Network
How to connect the ESP8266 to a WiFi network, using the Arduino core.
IoT Security Concepts
Explanation about 3 basic concepts related to information security - privacy, integrity and authentication
IoT: Security Concepts Part 1
The objective of this post is to explain 3 basic concepts related to information security - privacy, integrity and authentication, and give some examples about them in the context of IoT. Privacy Privacy consists on guaranteeing that the contents of a message are only seen by its intended recipients [1]. This means that if an …
Designing a LED matrix
How to create a simple LED Matrix using PNP transistors and a ULN2803A integrated circuit.
ESP8266: Reading temperature with the DS3231 RTC
The objective of this post is to explain how get the internal temperature measurements of the DS3231 using an ESP8266 and an easy to use Arduino library. Introduction As stated in a previous post, the DS3231 uses temperature compensation to calibrate the adjustable capacitors of its resonance circuit, in order to maintain time and date with …
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ESP8266: Connection to DS3231 RTC
How to connect the ESP8266 to a DS3231 Real Time Clock.
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