TL;DR – Over the past few years, Internet users have been brainwashed into thinking SSL guarantees their safety and privacy. This is only partly true.
Few weeks ago I was playing around with a 1602 LCD module and my ESP8266. I was disappointed by the number of wires that were running between the ESP8266 and the LCD display. It was a mess!
The I2C bus is a very flexible serial bus invented by Philips Semiconductors (Now NXP) that is used to connect ICs to Microcontrollers at low speeds at short distances.
I have been playing around with MicroPython for a while now. I enjoy writing straight up C/C++ code but MicroPython has brought the ease of Python to embedded platforms especially ESP8266. ESP8266 and MicroPython make a killer combo.
I’ve written about the ESP8266 and built a couple projects with it already. I’ve built a WiFi temperature sensor using the ESP8266 board that publishes the temperature over MQTT to a central data logging server. It’s a fun project.
In my last post a few weeks ago, I built a Temperature Sensor using an Arduino. This temperature sensor was limited to reading the current temperature using an LM35DZ sensor. I could’ve wired it up to a I2C display (Perhaps I’ll have a separate post for it). However, the real fun begins when sensors are able to communicate over the Internet. That way you can record and graph the data.
In this post, I’m going to take you through building a WiFi temperature sensor using the popular ESP8266 dev board.
The Particle Photon is an awesome dev board for prototyping IoT applications. It is based on the STM32F205 micro controller and the Broadcom BCM43362 WiFi chip. Here are the brief specs –