ESP types

Board PinOuts

Microcontroller/ESP-01 Microcontroller/D1mini Microcontroller/ESP32-mini

ESP8266

• Pinout
  • Wemos D1 Mini: [1]
  • ESP-01: [2]
  • NodeMCU: [https://lastminuteengineers.com/wp-content/uploads/arduino/ESP-12E-Development-Board-ESP8266-NodeMCU-Pinout.png]

Pin Priorities

Pin		I2C	SPI	ESP-01	Comment	Boot behaviour
GPIO14	D5		SCK
GPIO12	D6		MISO
GPIO13	D7		MOSI
GPIO5	D1	SCL
GPIO4	D2	SDA
GPIO16	D0					high on boot
GPIO15	D8		CS			Boot failure if high
GPIO0	D3			x		Boot failure if low
Inputs
ADC	A0				Analog input
Serial
GPIO1	TX			x	TX	high on boot, failure if low
GPIO3	RX			x	RX	high on boot
Strapping Pins (Boot)
GPIO16
GPIO2	D4			x (LED)		high on boot, boot failure if low

ESP32

• Pinout
  • ESP32-mini: [3]
  • Lolin32: [4]
  • ESP32 Devkit v1 (30pin): [5]
  • ESP32 Devkit v1 (38pin): [6]

Pin Priorities

Pin		ADC1	DAC	RTC(WakeUp)	Touch	SPI	Comment
IO04				x	x
IO05						CS
IO16
IO17
IO18						CLK
IO19						MISO
IO23						MOSI
IO25			x	x
IO26			x	x
IO27				x	x
IO32		x		x	x
IO33		x		x	x
IO12				x	x	HSPI	(Platform IO JTAG)
IO13				x	x	HSPI	(Platform IO JTAG)
IO14				x	x	HSPI	(Platform IO JTAG)
IO15				x	x	HSPI	(Platform IO JTAG)
Input only
IO34		x		x			Input only
IO35		x		x			Input only
IO36		x		x			Input only, Hall
IO39		x		x			Input only, Hall
Serial, I2C, SPI
IO1							TX
IO3							RX
IO21							I2C SDA
IO22							I2C SCL
Strapping Pins (Boot)
IO0				x			Boot button
IO2				x			Block flash
IO5							?
IO15							Low = no boot log
Flash Chip
IO06
IO07
IO08
IO09
IO10
IO11