Link	Raspberry Pi RP2040	Espressif ESP32	Espressif ESP32-S2	STM32 F1 series	STM32 G4 series	STM32F103C8T6	Espressif ESP8266	Teensy 4.1
Short name	RP2040	ESP32	ESP32-S2	STM32 F1	STM32 G4	STM32F103C8T6	ESP8266	Teensy 4.1
Website	raspberrypi.org/...	espressif.com/...	espressif.com/...	www.st.com/...	www.st.com/...	www.st.com/...	espressif.com/...	pjrc.com/...
Release date	Jan. 21st 2021	2016	2019	2007	2019	2007 Jun 01	2014	2020 May 11
Product details
CPU	Arm Cortex-M0+ Dual-core @133MHz	Tensilica Xtensa LX6 32 bit Dual-Core @ 160 / 240Mhz	Tensilica Xtensa LX7 32 bit Single-Core @ 240Mhz	ARM Cortex-M3 @ 24 / 36 / 48 / 72 MHz	ARM Cortex-M4F @ 170 MHz FPU, DSP instructions	32-bit ARM Cortex M3 72MHz max	Tensilica LX106 32 bit @ 80 MHz (up to 160 MHz)	NXP IMXRT1062DVJ6A ARM Cortex-M7 at 600 MHz with FPU (32 bit float and 64 bit double precision), DSP instructions.
Coprocessor		ULP	ULP (RISC-V)
RAM	264 KB	520 KB	320 KB	4 KB - 96 KB	32 KB - 128 KB	20 kb	50 KB less than	1.024 KB RAM (512K tightly coupled)
ROM (Flash)		448 KB	128 KB	16 KB - 1024 KB	128 KB - 512 KB	64 Kb or 128 Kb	0 use external SPI flash	7.936 KB Flash
UART	2	3	2			3 USARTs (ISO 7816 interface, LIN, IrDA capability, modem control	2	8 UARTS
SPI	Yes 2 (OSPI)	Yes 4	Yes 4 (OSPI)			Yes 2	Yes 2	Yes 2
Wi-Fi	No	Yes 802.11b/g/n	Yes 802.11b/g/n			No	Yes 802.11b/g/n (max 65Mbps)	No
Bluetooth®	No	Yes 4.2 BR/EDR + BLE	No			No	No	No
USB Host	Yes	No	Yes			No	No	Yes 2 usb ports (1 as USB host, 5 pin header with power management)
Ethernet (LAN, RJ45)	No	Yes 10/100Mbps	No			No	No	Yes Ethernet 10/100 Mbit (6 pin on board header). Teensy 4.1 contains an Ethernet controller and Ethernet PHY chip.
RTC Memory		16 KB	16 KB			No		16 bytes of memory are located within the RTC. If a coin cell is connected to VBAT, contents of this memory is preserved while power is off. This memory is accessed as 32 bit registers LPGPR0-LPGPR3.
External SRAM		8 MB up to	128 MB up to					16 MB up to PSRAM (QSPI Memory Expansion, ready to solder 1 or 2 chips such as IPS6404LSQ or ESP PSRAM64H on board)
External Flash		16 MB up to	1 GB up to				16 MB up to	8 MB up to (QSPI Memory Expansion, board ready to solder additional 8MB Flash chip such as 25Q128JVSQ)
ESP-MESH	No	Yes	Yes			No	Yes	No
CAN		Yes v2.0				Yes	No	Yes 3
GPIO	30	34	43			80 (up to)	17 (up to)	55 input/output signal pins (42 are accessible when used with a solderless breadboard)
Hall effect sensor	No	Yes	No			No	No	No
Temperature sensor	No	Yes	Yes			Yes	No	Yes A built in temperature sensor allows reading the temperature inside the MCU chip
Touch sensors		10	14			No	No	No
I²C	Yes	Yes up to 2	Yes up to 2			Yes up to 2	Yes up to 1	Yes 3
I2S	1	2	1			1	2	2 (I2S/TDM)
ADC	Yes x4 12-bit	Yes 12 bit SAR ADC up to 18 channels	Yes 12 bit SAR ADC up to 20 channels			Yes 2 x 12-bit, 1 μs A/D converters (up to 16 channels)	Yes 10 bit	Yes 18 pins total (12 bit, 2 Converters, 4 comparators)
DAC	No	Yes 8 bit up to 2 channels	Yes 8 bit up to 2 channels			Yes	No	No
PWM	Yes up to 16	Yes up to 8	Yes 8			Yes 37	Yes 4	Yes 31 pins/outputs (3x PWM 32 bit, 32x PWM 16 bit)
SDMMC	No	Yes	No			No	No	Yes 1 SDIO (4 bit) native Micro SD Card
RMT (remote control)	No	Yes	Yes			No	No	No
LCD Interface	No	No	Yes			No	No	No not dedicated
Camera Interface	No	No	Yes			No	No	No not dedicated
Deep sleep consumption	18 µA (Dormant) 39 µA (Sleep)	10 µA, Yes	5 µA			1 Yes	20 µA, Yes
Security
Secure flash		1024-bit OTP secure boot	4096-bit OTP secure boot
Cryptography support		AES, SHA-2, RSA, ECC, RNG	AES-128/192/256, SHA-2, RSA, RNG, HMAC, Digital Signature					Symmetric ciphers and one-way hash can be computed by hardware, but currently no library support exists to utilize this hardware.
Dimensions
Height	7 mm	6 mm	7 mm				5 mm	0.16 in (4.07 mm) (no extra PSRAM or Flash included)
Width	7 mm	6 mm	7 mm				5 mm	0.7 in (17.81 mm)
Weight