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/* Using the OLED */
= ESP32 modules with OLED display =
There are several modules available that combine an ESP32 with an OLED display. Unfortunately they is often not much info about those, especially how to use them with Arduino.
Another module that features also a LoRa radio is the [[Heltec_Wifi_LoRa_32]].
[[Datei:ESP32wOLED1.jpg|x300px]]
[[Datei:ESP32wOLED2.jpg|x300px]]
== Wemos like module ==
== Module with TTGO written on it, featuring 18650 battery holder ==
This is also a clone and very likely not from TTGO. It is equipped with an OLED display and a 18650 battery holder including some kind of charging circuit. The antenna placing of the module is not very wise - the Wifi performance is reduced somewhat compared to modules with a better placing.
== Arduino ==
Select "WEMOS LOLIN32" to work with the modules.
== Using the OLED ==
For both modules it seems that the OLED display is accessible by GPIO5 and is SDA, Pin GPIO4is SCL using this line with the [https://github.com/squix78/esp8266-oled-ssd1306 squix78 ssd1306.h] Library: <pre>SSD1306 display (0x3c, 5, 4);</pre> Build a Wifi-Scanner with it - find source here: https://github.com/hackffm/ESP32_OLED_WifiScanner View Bad Apple video on it: https://github.com/hackffm/ESP32_BadApple [[Datei:ESP32_BadApple.jpg|x300px]] {{#ev:youtube|https://www.youtube.com/watch?v=ItfAB2nQskM}}
