{"id":87124,"date":"2019-07-13T15:46:36","date_gmt":"2019-07-13T15:46:36","guid":{"rendered":"https:\/\/randomnerdtutorials.com\/?p=87124"},"modified":"2021-06-30T14:18:22","modified_gmt":"2021-06-30T14:18:22","slug":"esp32-built-in-oled-ssd1306","status":"publish","type":"post","link":"https:\/\/randomnerdtutorials.com\/esp32-built-in-oled-ssd1306\/","title":{"rendered":"ESP32 Built-in OLED Board (Wemos Lolin32): Pinout, Libraries and OLED Control"},"content":{"rendered":"\n

The Wemos Lolin32 OLED is an ESP32 development board with built-in OLED display. In this guide, we’ll take a quick look at the board, its pinout, and how to control the OLED display with Arduino IDE or MicroPython.<\/p>\n\n\n\n

\"Wemos<\/figure><\/div>\n\n\n\n

Wemos Lolin32 ESP32 OLED Overview<\/h2>\n\n\n\n

The WeMos Lolin32 OLED<\/a> is a development board with ESP32 and built-in 0.96 inch 128×64 I2C OLED display. <\/p>\n\n\n\n

\"WeMos<\/figure><\/div>\n\n\n\n

As a regular ESP32 board, it features a BOOT and a EN (RST) button. Some models have the buttons at the back, some have both at the front, and others have one at the front and other at the back. However, all boards should work in a similar way.<\/p>\n\n\n\n

\"WeMos<\/figure><\/div>\n\n\n\n

Where to buy?<\/h3>\n\n\n\n

You can go to the WeMos Lolin32 ESP32 OLED<\/strong><\/a> page on Maker Advisor<\/a> to find the best price at different stores.<\/p>\n\n\n\n

Lolin32 OLED Pinout<\/h2>\n\n\n\n

The Lolin32 OLED board doesn’t have as much accessible GPIOs as a regular ESP32. However, it can be really handy in projects that require an OLED display, without the need for extra circuitry.<\/p>\n\n\n\n

The following figure shows the Lolin32 ESP32 OLED board pinout.<\/p>\n\n\n\n

\"Pinout
Picture adapted from (view source<\/a>)<\/figcaption><\/figure><\/div>\n\n\n\n

The OLED display communicates with the ESP32 using I2C communication protocol. It uses the following pins for SDA\/SCL:<\/p>\n\n\n\n

SDA<\/strong><\/td>GPIO 5<\/span><\/td><\/tr>
SCL<\/strong><\/td>GPIO 4<\/span><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Recommended reading:<\/strong> ESP32 Pinout Reference Guide<\/a><\/p>\n\n\n\n

Control the OLED with Arduino IDE<\/h2>\n\n\n\n

To control the board using Arduino IDE, you need the ESP32 add-on installed. You can follow the next guide:<\/p>\n\n\n\n