ESP32TTGO-OLED-18650

Features

• ESP-WROOM-32 Module (Wifi, Bluetooth, two cores)
• USB to serial bridge with Silicon Labs CP210X Chip (supported by Windows and Linux)
• Charge Circuit for an 18650 battery (backside of board)
• OLED display (SSD1306 or compatible) I2C version
• LED on GPIO16
• power switch

http://www.areresearch.net/2018/01/how-to-use-ttgo-esp32-module-with-oled.html

Needs Library https://github.com/ThingPulse/esp8266-oled-ssd1306 and TimeLib

battery level

float batteryLevel = map(analogRead(33), 0.0f, 4095.0f, 0, 100);

chip TP5410

ARDUNIO

• Board: ESP32 Dev Module

HARDWARE

LED = GPIO16[D0] bootButton = 0

scematic

https://www.espressif.com/en/products/hardware/esp32-devkitc/resources

OLED

Unlike on other ESP32 boards with OLEDs, the OLED's I2C SDA and SCL pins are connected as follows:

• SCL - Pin 4
• SDA - Pin 5

It does not require an "enable" signal on GPIO16 as suggested in some programs I found. So comment these out if you see them.

Pinout

Upload

• turn off
• hold boot putton
• wait for upload
• turn on
• release boot button

2 option

• just holding boot button
• release on upload process

HARDWARE

#define LED 16
SSD1306Wire display(0x3c, 5, 4, GEOMETRY_128_64);

Platformio

[env:ttgo-lora32-v1]
platform = espressif32
board = ttgo-lora32-v1
framework = arduino
lib_deps =
	thingpulse/ESP8266 and ESP32 OLED driver for SSD1306 displays@^4.6.1