Step 1: Wiring for the Wemos D1 Mini to the Dot Matrix Display. The Dot Matrix Display comes with the wires you can use. I simply cut off the plugs and solder them directly to the pin locations on both the LED Dot Matrix Display and to the Wemos D1 Mini. The Dot Matrix will slip into the case and snap in. I am planning on using a separate 12V 30A power supply to run my 500 WS2811 12V LEDs and I’ll power a ESP32 D1 mini using a 5V USB Micro cable and brick. I am interested to hear how “connecting a normally open pushbutton to GPIO0 (NodeMCU/Wemos pin D3) and ground.” helps here vs. using a level shifter. Also if I just hook it up without a A header file was added to the forcedInclude section to provide pin definitions. A literal "ESP8266" was added to the defines section to indicate the processor type. This define is used in lots of header files so it must be know to Intellisense when reading the headers. Here are the relevant sections of that .json file: Most commonly there are three reasons. 1) Wrong Cable. Many micro USB cables are only able to charge devices but not transfer data. So please make sure you have a data cable. 2) Driver problem. On some operating systems, the CH340 chip that it uses to connect to the computer might not be recognised. WeMos D1 R2 and mini . Contents. WeMos D1 R2 and mini. Hardware. Configuration. Uploading. Debugging. Frameworks. Hardware . Platform Espressif 8266: ESP8266 is a cost-effective and highly integrated Wi-Fi MCU with built-in TCP/IP networking software for IoT applications. The ESP8266 chip has a single ADC device which reads signal levels up to 1.8 volts or so. The good news is that my favourite ESP8266 based device, the Wemos D1 mini, has a “potential divider” circuit on the board that allows the input to accept inputs up to the 3.3 volt power supply. .

what is wemos d1 mini