ESP8266 | Embedded Lab

Category Archives: ESP8266

IoT Energy Meter

Posted on May 19, 2017 by R-B One comment

This cloud-connected energy meter works in conjunction with the regular household power meter to provide detailed information about the electricity usage at home. Modern power meters have a LED blinking every time a watt-hour is used, the IEM detects these flashes using a interrupt, counts them, then the data is stored to the cloud. Usually power companies provide very rough electricity usage data, the IEM provides data with a minute resolution. Knowing the household electricity usage allows to extrapolate statistics and can give precise numbers about the costs.

Tutorial 9: ESP8266 and WS2812B RGB LED (or NeoPixel) ring

Posted on May 18, 2017 by R-B Leave a comment

This tutorial describes how to interface a WS2812B RGB LED ring or Adafruit’s NeoPixel ring to ESP8266. The WS2812B is a smart RGB LED with a control circuit integrated in a 5050 SMD package. The RGB data transfer occurs through a single data input line using single NZR communication mode. Connection between the NeoPixel ring and ESP8266 is through a single data wire. I am using EasyESP-1 here for illustration. The Data In (DI) line of the NeoPixel ring connects to D1 pin of EasyESP-1. VCC and GND pins go to 3.3V and GND terminals of EasyESP-1. I used a 40 RGB LED NeoPixel-compatible LED

DIY YouTube subscriber counter

Posted on March 1, 2017 by R-B Leave a comment

Becky Stern’s new Instructables describes how to build a very simple realtime YouTube subscriber counter using a ESP8266 board and a seven segment LED display module. I was inspired by the Play Button awards YouTube sends out for subscriber milestones and whipped up a simple circuit using an ESP8266 wifi board and seven segment display to show off my realtime subscriber count. This is a great IoT beginner project, with just a little soldering and a code personalization required to make it work for your own account. Before attempting this project, you should be generally familiar with uploading new programs

Heart rate monitoring over the internet using ESP8266

Posted on February 26, 2017 by R-B 4 comments

With the rapid development and maturing of internet-of-things (IoT) technology, the IoT-driven smart sensors and systems are changing business in multiple industries. In healthcare industry, it is gaining more attention lately because of its immense potential in reducing the cost of tracking health information, as well as in providing health care to people who were not able to receive it before. This project describes a simple remote heart rate monitoring system based on the ESP8266 platform and the Easy Pulse Plugin sensor module. The ESP8266 reads in the analog photoplethysmograph (PPG) output from the Easy Pulse sensor, computes the heart beat rate in real time,

Tutorial 8: ESP8266 Internet clock

Posted on February 8, 2017 by R-B 4 comments

The National Institute of Standards and Technology (NIST) provides official time in the United States. NIST disseminates the time using several methods, including radio broadcasting over short-wave and long-wave frequencies, telephone dial-in services (ACTS), and Network Time Service (NTS) over the internet. This tutorial describes how to build an ESP8266-based internet clock that uses NIST’s NTS service to retrieve accurate time information. The time is displayed on a colorful TFT LCD (ILI9341 driven) in both analog clock dial and digital formats. The time is synchronized to the NIST server in every 2-minute interval. Hardware This project uses an ESP8266 module to connect to

« Older Entries Recent Entries »