WeMos D1 Mini / ESP8266

The ESP8266 is a low-cost WiFi chip with full TCP/IP stack and MCU (Micro Controller Unit) capability. There are several common development-boards which use this chip, and the WeMos D1 is one of the most common.

The D1 boards are small, cheap (approximately €3.00), and easy to code for in Lisp, FORTH, (micro) Python, or plain C.

Simple Projects

Absolute WeMos D1 Mini (ESP8266) Basics

This brief guide describes the basics of getting started; connecting the board, discovering its name, installing the appropriate software, and getting a WiFi example working.

Alarm Button

This brief guide describes the creation of an "alarm button", which will trigger an alarm sound on a PC when pressed.

Default Pins: WeMos D1 Mini

Brief overview of pins, for SPI & I2C.

Flash: Reading/Writing Files

The WeMos D1 Mini comes with 4Mb of on-board flash. Here we show how to use it for reading/writing files. Useful for HTTP-servers, for example.

Helsinki Tram Time Display

This project combines a simple I2C LCD display with an ESP8266 - to produce something that shows local tram-times, along with the current date & time. The tram-times are retrieved via HTTP from the the Helsinki Transport API.

Message Publishing & Subscribing via MQTT

Simple example of how to configure an MQTT server, and work with it from the command-line, Perl, and the Mini D1.

NTP-Based Clock

This is a simple project which uses NTP to recive the current date & time, and then displays the latter on an set of 7-segment displays, complete with blinking : symbol.

Pixel Editor

Attaching an 8x8 LED Matrix to a WeMos Mini D1, and using a web-based pixel-editor to control what is displayed upon it.

Temperature & Humidity

This project builds upon the previous message-publishing example, and records the temperature & humidity, allowing it to be graphed and viewed via the message-queue.

Washing Machine Alarm

Wiring up a vibration-sensor to a ESP8266 board allows you to be alerted when your laundry has been washed.

Weather Station

This project combines a simple OLED display with an ESP8266, to show the local weather conditions, along with a three-day forecast. The details are fetched from a remote API so there is no need to add hardware for temp/humidity detection.

Web-controlled LED

This project demonstrates controlling the on-board status LED via your browser - no additional hardware required.