ESP types

Board PinOuts

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

ESP8266

• Pinout
  • Wemos D1 Mini: [1]
  • ESP-01: [2]

Pin Priorities

Pin		I2C	SPI	ESP-01	Comment	Boot behaviour
GPIO5	D1
GPIO4	D2
GPIO14	D5		SCK
GPIO12	D6		MISO
GPIO13	D7		MOSI
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