ESP types

ESP32 types


	CPU	SRAM	ROM	Flash	RTC SRAM	Wifi	Bluetooth	GPIO	ADC		release
ESP32	1x/2x LX6	520KiB	448KiB			b/g/n 2.4G	4.2	34	12bit		2016
ESP32-S2	1x LX7	320KiB	128KIB	0-4MB	16KiB	b/g/n 2.4G	-	43	2x13bit		2019
ESP32-S3	2x LX7	512KiB	384KiB	0-8MB	16KiB	b/g/n 2.4G	5 LE	45	2x12bit		2020
ESP32-C2	1x RISC-V	272KiB	576KiB	1-4MB			5 LE	14			2022
ESP32-C3	1x RISC-V	400KiB	384KiB	0-4MB	8KiB	b/g/n 2.4G	5 LE	22/16	2x12bit	ESP8266 pins comp.	2020
ESP32-C6	1x RISC-V	512KiB	320KiB	0-4MB		b/g/n/ax 2.4G	5.3 LE	30/22	12bit	Zigbee + Thread	2023
ESP32-H2	1x RISC-V	256KiB		2-4MB			5.3 LE	19		Zigbee + Thread
ESP32-C5	1x RISC-V	400KiB	384KiB			b/g/n/ax 2.4G	5 LE	20+			?
ESP32-P4	2x RISC-V	768KiB				-	-	50+			?

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

Pinout
- ESP32-mini: [4]
- Lolin32: [5]
- ESP32 Devkit v1 (30pin): [6]
- ESP32 Devkit v1 (38pin): [7]