WiFi IoT 3 channel relay board with MQTT and HTTP API using ESP8266

Martin writes: The ESP8266 DHT22/LED blinker project grew into a M2M relay board project with the following features in mind: Relatively small (10x5cm) PCB Powered via on-board power supply or externally via a micro-USB plug Has three 2A Sharp Solid State Relays (later version has 8A SSR) DHT22 humidity/temperature and/or DS18b20 temperature sensor support to use […]

First steps with the ESP8266-03 development board

As a follow up to the “Development board for the ESP8266-03” post, Limpkin blogged about his first steps with ESP8266-03 dev board: As mentioned in my previous blog post I was very optimistic when designing my ESP8266-03 development board and didn’t even prototype it before launching a batch in production. As I just received a few of these […]

A development board for the ESP8266-03

Limpkin has developed a development board for the ESP8266-03: The ESP8266 modules come with a pre-loaded firmware that will accept some commands through their UART interface (connect to wifi, open udp socket, send data to this IP…). Moreover, since Espressif recently released their SDK you can now load your own custom programs using the existing bootloader. […]

ESP8266 powered web server + LED control + DHT22 temperature/humidity sensor reading

Martin writes: The ESP8266 System-on-chip (SoC) has recently came out of nowhere and has been taking by storm the IoT DIY world. It is a $4.50 Wi-Fi capable chip that has remarkable specs, obsoleting overnight a number of similar products that are out there. The price factor, availability of SDK and a fast growing community […]

First impression on the ESP8266 serial-to-WiFi module

Ray Wang has been experimenting with the ESP8266 Serial-to-WiFi module, which has gained much hype recently. “The module is very compact, easy to interface with, and inexpensive. I wrote an Arduino program to show how to use the Arduino to communicate with the WiFi module and set up a very simple web server.” Check out […]

Brewmonitor: The Arduino-powered, cloud-based homebrewing controller

The Arduino and Cloud-based homebrewing controller by Martin Kennedy of TheBedroomLaboratory: It’s just a basic site, based on this Scotch.io tutorial, which is currently plotting the temperature in my sitting room. It’s got a PHP backend (Laravel framework with RESTful API), MySQL database and an AngularJS frontend with (n3-chart/d3 for the graph). In the house, I’ve whacked […]