Table of Contents

ESP32
- Modules
- Pins
  - Straping pins
  - Input only pins!

ESP32

ESP32 Family:

ESP32 (2 core, BT, WiFi)
ESP32-S2 (1 core, no BT)
ESP32-C3 (1 core RISC, WiFi, BT5.0)
ESP32-S3 (2 core, WiFi, BT5.0)

Chip Series Comparison

Modules

ESP32 WROOM 32U
D1 MINI
WEMOS LITE

Pins

Max voltage on any pin is 3,3V!

Straping pins

Following pins state are latched into GPIO_STRAPPING register during reset:

MTDI
GPIO0
GPIO2
MTDO
GPIO5

Input only pins!

Input only GPIOs! Or differential ADC.

GPIO34 = ADC1_CH6
GPIO35 = ADC1_CH7
GPIO36 = ADC1_CH0 = SENSOR_VP
GPIO39 = ADC1_CH3 = SENSOR_VN