Wemos Lolin D1 Mini Pro V2 (HCWEMO0018)

Wemos ESP8266 based development boards and shields *** NEW***
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Wemos Lolin D1 Mini Pro V2 (HCWEMO0018)

Post by admin » Tue Aug 07, 2018 3:06 pm


The WeMos D1 mini PRO is a miniature wireless 802.11 (Wifi) microcontroller development board. It turns the very popular ESP8266 wireless microcontroller module into a fully fledged development board. Programming the D1 mini pro is as simple as programming any other Arduino based microcontroller as the module includes a built in microUSB interface allowing the module to be programmed directly from the Arduino IDE (requires the ESP8266 support to be added via board manager) with no additional hardware.

The D1 mini Pro is also designed to allow Wemos compatible shields to be plugged into the board in a similar way to the Arduino development board platform, which greatly expands its capabilities. There is already a large range of compatible shields available and these can also be purchased via our website.

New V2.0 features: This version now includes a lithium battery charging circuit (500mA max) and header which allows the module to be powered from a 3.7V single cell lithium battery.



11 digital input/output pins
1 analog input(3.2V max input)
16M bytes(128M bit) Flash
External antenna connector
Built-in PCB antenna
Lithium battery interface, 500mA Max charging current
Compatible with Arduino, MicroPython, NodeMCU

Operating Voltage: 3.3V
Digital I/O Pins: 11
Analog Input Pins: 1(Max input: 3.2V)
Clock Speed: 80MHz/160MHz
Flash: 16M bytes
Length: 48mm
Width: 25.4mm
Weight: 4.5g





The Wemos D1 mini includes a CH340 USB to UART IC to allow it to be programmed directly from the USB port of a computer.

USB 32/64 bit drivers for Microsoft Windows computers can be downloaded from our Github page here:

Windows Installation Instructions

Drivers are available in the link below. Simply download and unzip them, connect your D1 Mini to your computer with a USB cable and when the new hardware is detected, point the wizard to the folder you just unzipped to and it should install without any problems.

Windows Driver here

MAC installation instructions

New code signed version confirmed to work with 10.12 Sierra


Download the driver (you must be logged in to download).

Once downloaded, double-click the zip file to unzip it.

Run installer found in that folder.

If asked to restart, do not restart just yet.

Now restart your Mac.

Adding board support to the Arduino IDE

Latest versions of the Arduino IDE allow for adding additional 3rd party board support directly from within the Arduino IDE. To add support simply open up your Arduino IDE and follow these steps:

1) Go to File->Preferences

2) In the window that opens up find the text box labeled 'Additional Boards Manager URLs:' and paste the following line into it:

http://arduino.esp8266.com/stable/packa ... index.json

Then click the OK button to close the window.

3) Next go to Tools->Board->Boards Manager

4) In the window that opens up look for the entry titled 'esp8266 by ESP8266 Community Version x.x.x' and click on it.

5) In the bottom right-hand corner of this entry you should now see an install button appear. Click on this and board manager will then automatically add all the files necessary to support the ESP8266. This may take a few minutes depending on the speed of your internet connection.

6) Under tools->board you should now see additional board options for various ESP8266 devices including one called 'WeMos D1 mini Pro'.


Disclaimer: Libraries, example code, and diagrams are provided as an additional free service by Hobby Components and are not sold as part of this product. We do not provide any guarantees or warranties as to their accuracy or fitness for purpose.

Descriptions and diagrams on this page are copyright Hobby Components Ltd and may not be reproduced without permission.
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Posts: 6
Joined: Tue Jun 05, 2018 4:37 pm

Re: Wemos Lolin D1 Mini Pro V2 (HCWEMO0018)

Post by DAJ » Sat Jun 01, 2019 10:54 am

Nice addition to the range, though physically a bit larger than the Version 1 D1 mini. The battery connection and charging circuit will be particularly useful.

I have A couple of questions:
  1. Is the pinout the same as on the V1 part? It looks it, but as the pins are differently named it's hard to be sure.
  2. What is the pinout of the battery and I2C connections, and what connectors are used?
Will you be selling compatible Li-Ion batteries and connectors?

Cheers, Daniel.

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Re: Wemos Lolin D1 Mini Pro V2 (HCWEMO0018)

Post by andrew » Sun Jun 02, 2019 7:37 am

Is the pinout the same as on the V1 part? It looks it, but as the pins are differently named it's hard to be sure.
Yes the pinout is the same it's just for some reason Wemos have decided to use the actual ESP8266 pin names. If you take a look at the forum thread for the older version there is a table that shows this mapping,,,

http://forum.hobbycomponents.com/viewto ... 111&t=2126

What is the pinout of the battery
Looking into the connector the left pin is +Ve (VBAT) and the right pin -Ve (GND)

and I2C connections

Same as for other version of the D1 mini - SCL is GPIO5 (D1) and SDA is GPIO4 (D2). Also you can reference the table in the link above.

and what connectors are used?
I assume you are asking about the battery connector? If so it is a JST 2.0 PH 2 pin connector

Will you be selling compatible Li-Ion batteries and connectors?
For the connectors we do plan to have these on sale soon although I can't give you an exact time frame for when they will be on sale. For the batteries we are currently trying to find a competitive supplier of good quality lithium batteries.
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