====== 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)

[[https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/chip-series-comparison.html|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