ESP-WROOM-02 vs ESP32-C5-WROOM-1

ESP-WROOM-02

WROOM · ESP8266 · Active

As an affiliate we may earn from qualifying purchases. Prices and availability are set by AliExpress.

ESP32-C5-WROOM-1

WROOM · ESP32-C5 · New

As an affiliate we may earn from qualifying purchases. Prices and availability are set by AliExpress.

Figures here are compiled from Espressif's official datasheets, with the source linked on each page. Mistakes are possible, so if something looks off, please report it.

Which should you choose?

These run different SoCs (ESP8266 vs ESP32-C5), so they differ in CPU, wireless and peripherals, not just packaging.

Choose ESP-WROOM-02 if you need

smaller footprint (18×20 mm)

Choose ESP32-C5-WROOM-1 if you need

Wi-Fi 6: better battery life and throughput in busy networks
5 GHz Wi-Fi: less congestion and higher throughput than 2.4 GHz-only
802.15.4 radio for Thread, Zigbee and Matter-over-Thread mesh
Bluetooth LE
faster CPU (240 MHz, RISC-V)

Size, to scale

ESP-WROOM-02: 18×20 mm
ESP32-C5-WROOM-1: 18×27.5 mm

Spec differences at a glance

CPU: ESP-WROOM-02 Xtensa L106, 1-core · ESP32-C5-WROOM-1 RISC-V, 1-core
Max clock: ESP-WROOM-02 160 MHz · ESP32-C5-WROOM-1 240 MHz
SRAM: ESP-WROOM-02 — KB · ESP32-C5-WROOM-1 384 KB
ROM: ESP-WROOM-02 — KB · ESP32-C5-WROOM-1 320 KB
Flash options: ESP-WROOM-02 2 MB · ESP32-C5-WROOM-1 4 / 8 / 16 / 32 MB
PSRAM: ESP-WROOM-02 None · ESP32-C5-WROOM-1 8 MB (quad)
Co-processor: ESP-WROOM-02 none · ESP32-C5-WROOM-1 ULP-RISC-V
Wi-Fi: ESP-WROOM-02 Wi-Fi 4 · ESP32-C5-WROOM-1 Wi-Fi 6
Wi-Fi bands: ESP-WROOM-02 2.4GHz · ESP32-C5-WROOM-1 2.4+5GHz
Bluetooth: ESP-WROOM-02 — · ESP32-C5-WROOM-1 BLE 5.x
802.15.4 (Thread/Zigbee): ESP-WROOM-02 No · ESP32-C5-WROOM-1 Yes
Usable GPIO: ESP-WROOM-02 11 · ESP32-C5-WROOM-1 22
ADC: ESP-WROOM-02 1× 10-bit · ESP32-C5-WROOM-1 6× 12-bit
USB: ESP-WROOM-02 USB-Serial(external) · ESP32-C5-WROOM-1 USB-Serial-JTAG
TWAI (CAN): ESP-WROOM-02 No · ESP32-C5-WROOM-1 Yes
Operating voltage: ESP-WROOM-02 2.7-3.6 V · ESP32-C5-WROOM-1 3.0-3.6 V
Deep sleep: ESP-WROOM-02 20 µA · ESP32-C5-WROOM-1 — µA
Dimensions: ESP-WROOM-02 18 × 20 × 2.8 mm · ESP32-C5-WROOM-1 18 × 27.5 × 3.3 mm
Pin count: ESP-WROOM-02 18 · ESP32-C5-WROOM-1 29
Lifecycle: ESP-WROOM-02 Active · ESP32-C5-WROOM-1 New
Secure boot: ESP-WROOM-02 No · ESP32-C5-WROOM-1 Yes
Flash encryption: ESP-WROOM-02 No · ESP32-C5-WROOM-1 Yes
Crypto: ESP-WROOM-02 — · ESP32-C5-WROOM-1 AES, SHA, RSA, HMAC, ECC, ECDSA, RNG
Digital signature: ESP-WROOM-02 No · ESP32-C5-WROOM-1 Yes

Compute & memory

⚑ flag an error

	ESP-WROOM-02	ESP32-C5-WROOM-1
CPU≠	Xtensa L106, 1-core	RISC-V, 1-core
Max clock≠	160 MHz	240 MHz
SRAM≠	— KB	384 KB
ROM≠	— KB	320 KB
Flash options≠	2 MB	4 / 8 / 16 / 32 MB
PSRAM≠	None	8 MB (quad)
Co-processor≠	none	ULP-RISC-V

Wireless

⚑ flag an error

	ESP-WROOM-02	ESP32-C5-WROOM-1
Wi-Fi≠	Wi-Fi 4	Wi-Fi 6
Wi-Fi bands≠	2.4GHz	2.4+5GHz
Bluetooth≠	—	BLE 5.x
802.15.4 (Thread/Zigbee)≠	No	Yes
Antenna	PCB	PCB

Peripherals & I/O

⚑ flag an error

	ESP-WROOM-02	ESP32-C5-WROOM-1
Usable GPIO≠	11	22
ADC≠	1× 10-bit	6× 12-bit
USB≠	USB-Serial(external)	USB-Serial-JTAG
UART / SPI / I²C / I²S	2 / 1 / 1 / 1	2 / 1 / 1 / 1
TWAI (CAN)≠	No	Yes
SD/MMC	Yes	Yes
Ethernet MAC	No	No
Touch	0	0

Power

⚑ flag an error

	ESP-WROOM-02	ESP32-C5-WROOM-1
Operating voltage≠	2.7-3.6 V	3.0-3.6 V
Deep sleep≠	20 µA	— µA

Physical

⚑ flag an error

	ESP-WROOM-02	ESP32-C5-WROOM-1
Dimensions≠	18 × 20 × 2.8 mm	18 × 27.5 × 3.3 mm
Pin count≠	18	29
Temp range	-40 to 85 °C	-40 to 85 °C
Mounting	SMD castellated	SMD castellated
Lifecycle≠	Active	New

Security

⚑ flag an error

	ESP-WROOM-02	ESP32-C5-WROOM-1
Secure boot≠	No	Yes
Flash encryption≠	No	Yes
Crypto≠	—	AES, SHA, RSA, HMAC, ECC, ECDSA, RNG
Digital signature≠	No	Yes
TRNG	Yes	Yes