ESP8266 Peripherals: Indoor Positioning with IR Camera

DF Robot IR Camera Sensor
The sensor I’m going to talk about here is a very powerful one. And you actually might have a very similar one in your home somewhere. The DF Robot Positioning IR Camera uses the same or similar module that is built into the Nintendo Wiimote controller. The sensor module is capable of simultaneously detect up to four sources of IR light and make them accessible through a I2C interface. .....

ESP8266 Peripherals: Mini PIR Motion Sensor

  The ESP8266 is all about Internet of Things, right? So lets start sensing something in the real world! What about (human) presence in your apartment? There are various ways to do that but one of the most common type is sensing with pyro electric sensors which also called passive infrared (PIR) sensors (see Wikipedia). The one I am presenting in this post is also a PIR sensor; a really tiny one.....

ESP8266 Peripherals: uBlox GPS Module

Almost 20 years ago when I studied a few semesters of electrical engineering at the famous ETH in Zurich I had a lecture about the basics of digital electronics. And I remember the professor doing many practical demonstrations such as drilling holes into a CD to show the quality of error correction in different price categories of CD players. I also remember that he talked about tiny and cost efficient GPS receivers that soon would be part of every cell phone (remember, 20 years ago the real .....

ESP8266 Peripherals: KY-040 Rotary Encoder

[nextpage title=”Introduction” ] The ESP8266 took the hearts of the IoT and Do-It-Yourself community by storm, due the very attractive price, its internet connectivity and due to the relatively rich amount of available GPIO pins. But an internet connected device is not worth much without means to interact with the real world. Thanks to standardised communication protocols like I2C, SPI and serial interface and the work of the Arduino community there are many sensors and ac.....

ESP8266: NodeMCU Motor Shield Review

If you want to engage with your ESP8266 into robotics there is now an almost ready-to-go solution: the NodeMCU Motor Shield. If my research is correct then it was the Doctors of Intelligence & Technology (http://doit.am/) who created it and also are offering some LUA code to get started. This post shares my experience with the motorshield and also wi.....

ESP8266/Arduino: MAX7219 8×8 Led Matrix Library

Twice a year the company I work for (Netcetera) organizes a retreat for programmers, usually in the mountains. In the Spring issue this year we went to a resort in a beautiful mountain region. Inspired by the wonderful landscape I managed to write a library for the recently published Arduino IDE for ESP8266 which allows you to manipulate pixels and write animated.....