Mini modules and Shields

The HomeDing library can be used with these Boards that offer a selection of processor modules and shield.

The D1 mini format for boards and shield was created by the wemos.cc company and is a good base for starting with DIY devices.

There are many different mini boards available also with differend ESP processors. They all share the position of 2 connectors with 8 pins that are compatible to a certain degree and can be combined with the available shields.

Pins

All the ESP8266 based boards above use the same pin assignments and are interchangeable.

Scroll the pictures above to find the pin layout for boards.

All the ESP32 offers similar pins to be used with the shields and in some cases also some additional pins outside.

ESP8266 boards

The ESP8266 versions have been out first offering

11 digital input/output pins
1 analog input(3.2V max input)
3V3, 5V, GND and RST are always in the same position
RST momentary button

Some boards offer i2c connectors.

D1 Mini Boards (ESP8266 and ESP32)

There are many different mini boards available with differend ESP processors that share the same form factor and connector pin assignments.

The D1 mini board labeld with v4 uses a ESP8266 MCU and 4 MByte flash memory chip and includes:

USB-C connector
i2c connector using the Qwiic standard JST SH 4-pin (1mm)
A solder-bridge for deep sleep mode is available on the back

The D1 mini pro board is based on the ESP8266 MCU and 4 MByte flash memory chip and includes:

Built-in PCB antenna and External antenna connector
Lithium battery interface, 500mA Max charging current with a PH 2.0 connector
i2c connector using the Qwiic standard JST SH 4-pin (1mm)
RST and GPIO16 can be connected using a solder spot on the back to support deep sleep mode.

ESP32 boards

There are ESP32 based boards that use the same form factor but may not be completely compatible.

D1 mini ESP32

A similar D1 mini ESP32 board exists using a ESP32 MCU and 4 MByte flash memory chip.

Shields

There are some shields for the board form-factor available. Here some examples:

Mini Shield with DHT sensor The DHT shield with a digital temperature and humidity sensor.

This shield can be used with the DHT Element.

Mini Shield with SHT30 sensor The SHT30 shield with a digital temperature and humidity sensor can be stacked upon a board or can be attached by using a Qwiic connector cable.

Mini Shield with DS18B20 / Dallas sensor The SD18B20 Shield has a Dallas / DS18B20 sensor that can be used with the Dallas Element to retrieve the local temperature.

The Data pin of the sensor is connected to D2.

Mini Shield with WS2812 The WS2812 Shield has one WS2812 LEDs that can be addressed using the Neo Element.

Mini Shield with 8*8 Neo pixels The D1 Mini 8x8 RGB Shield has 64 WS2812 LEDs that can be addressed using the Neo Element. using the configuration "config": "rgb".

The data signal for the chain of WS2812 LEDs is bound to D4.

Shield for self-assembled components This is a shield you can use to create and apply special configurations by soldering components on the free grid.

alt text The D1-Mini SD Card shield adds a sd card slot for min sd cards to the standard SPI bus to be used with the SD Element.

The CS assignment can be changed on the back of the shield by cutting the default (D4) wiring and soldering a bridge for another pin.

Mini Shield with buzzer The Buzzer Shield has a passive speaker that can be used with the Tone Element to make some noise.

The buzzer can be connected to various pins by closing one of the solder pads.

Mini Shield for LiPo powering The LiPo Shield enables powering a Mini board and shields using a LiPo batery. The shield supports chaging.