WeMosD1Mini < AFNOG

---+ The !WeMos D1 mini and its sensor and actuator shields
---++ Introduction

We have seen that the ESP01 can be programmed with micro Python and that there are add-on sensor boards available. However, when we connect the sensor board we loose the serial connection to the PC. This can be corrected by soldering extra connectors to the top of the ESP01 board but this is fiddly and needs good soldering equipment and good soldering skills. The other option is to get access to the ESP01 through !WiFi using !WebRepl

A better and only slightly more expensive solution (we are talking about ~ 3.5 US$ instead of 2.5 US$) is the Wemos D1 mini board. This boards gives up more I/O connections and many more sensor and actuator shields are readily available on the market.
---++ The processor board

The processor board uses an Espressif ESP8266 processor chip and 4 MBytes of flash are installed on the board.

<img alt="wemosd1mini.png" src="%ATTACHURL%/wemosd1mini.png" title="wemosd1mini.png" />

You will find a description of the pinout at https://www.likecircuit.com/wemos-d1-mini-pinout

For convenience I copied the basic information here.

<img alt="d1MiniPinout.png" src="%ATTACHURL%/d1MiniPinout.png" title="d1MiniPinout.png" />

A big number of sensor and actuator boards are available. You will find a complete list with their description at https://wiki.wemos.cc/products:d1_mini_shields

Here are the sensor shields and their test programs for the workshop:
   * The [[triple base and prototype boards]]
   * A simple [[Pushbutton Switch]]
   * [[The WS2812B rgb LED]]
   * The DS1307 [[real time clock]] and data logger
   * The [[buzzer shield]]
   * The [[bmp180 shield]] featuring an atmospheric pressure and a temperature sensor
   * The [[Oled shield]]
   * The [[DS18B20 shield]] with a Dallas [[https://cdn.sparkfun.com/datasheets/Sensors/Temp/DS18B20.pdf][DS18B20 ]]1-wire digital temperature sensor
   * The [[LED matrix shield]]
   * The [[SHT-30 shield]] with a SHT-30 !I2C digital temperature and humidity sensor
   * The [[DHT11 shield]] with a DHT11 digital temperature and humidity sensor. This device uses its own private serial communication protocol

For each of the devices I create 2 directories:
   * a <i>driver </i>directory containing programs testing the module without Cayenne communication
   * a _cayenne_ directory for the final program

---++ Comments

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Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
png	d1MiniPinout.png	r1	manage	542.9 K	2019-03-20 - 09:27	UliRaich
png	wemosd1mini.png	r1	manage	313.5 K	2019-03-20 - 09:20	UliRaich

This topic: AFNOG > WebHome > AFNOGWorkshop2019 > WeMosD1Mini
Topic revision: r3 - 2019-03-22 - UliRaich