arduino vs wemos D1

[Dan]

How do you convert an Arduino sketch to run on a Wemos D1?

 

[chad]

The Wemos D1 is based on the ESP8266 chip, so converting an Arduino sketch to run on it usually takes a few key adjustments. Here's a quick breakdown:

1.​

• Go to File > Preferences
• In the Additional Boards Manager URLs, add:
  
  http://arduino.esp8266.com/stable/package_esp8266com_index.json
• Then go to Tools > Board > Boards Manager, search for ESP8266, and install it.

2.​

• Go to Tools > Board and choose "LOLIN(WEMOS) D1 R2 & mini"

3.​

• The D1 doesn’t use Arduino pin numbering. For example:
  
  • D1 = GPIO5
  • D2 = GPIO4
  • D5 = GPIO14
    Use the D1, D2, etc. names directly, or look up a Wemos D1 pinout chart for reference.

4.​

• If your sketch uses WiFi, replace #include <WiFi.h> (used for ESP32) with #include <ESP8266WiFi.h>
• Make sure all other libraries are compatible with the ESP8266.

5.​

• The Wemos D1 has less RAM/flash than some Arduinos. Large sketches or complex libraries might need tweaks.

6.​

• Plug in the D1 via USB
• Select the correct port under Tools > Port
• Hit Upload

If your sketch relies heavily on hardware-specific Arduino features (like interrupts on specific pins), you may need to adapt those sections.


Want help converting a specific sketch? Drop it here and I’ll see what i can do.

 

[Dan]

How do you convert an Arduino sketch to run on a Wemos D1?

I have found several ways to run Arduino sketch on the Wemos D1. By looking at the two sketches and comparing what is different between the two. I have hacked several programs to run on the Wemos D1, such as a timer, program showing train signal, and using the Wemos D1 with a bigger OLED. If there is anybody that needs help in programming, let me know, I will help if I can. I am not a programmer, just someone trying to write programs to help me out.