ESP32-C5-WROOM-1
WROOM module · based on ESP32-C5 · New
- RISC-V
- 1× @ 240 MHz
- Wi-Fi 6
- BLE 5.x
- 802.15.4
- 4 / 8 / 16 / 32 MB flash
- 8 MB PSRAM
- 22 GPIO
- PCB antenna
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Interactive 3D model · drag to rotate
Every figure here is checked against Espressif’s official datasheets. We’ve taken every care to keep it accurate — but datasheets are dense and mistakes happen, so if something looks off, please report it.
The ESP32-C5-WROOM-1 is a general-purpose Espressif module built on the ESP32-C5 single-core RISC-V SoC clocked up to 240 MHz. It pairs dual-band (2.4 & 5 GHz) Wi-Fi 6, Bluetooth LE and 802.15.4 (Thread/Zigbee) with up to 32 MB flash and up to 8 MB PSRAM, routes the radio to a PCB antenna, and breaks out 22 GPIO; the module measures 18 × 27.5 × 3.3 mm.
With Wi-Fi 6 plus 802.15.4, it suits Matter products and low-power mesh networks that also need an IP uplink. Secure boot and flash encryption are available for production security. Espressif lists target uses including Smart Home, Service Robot, Industrial Automation, Audio Devices and Health Care. It is a recent addition to the line-up.
Pinout
⚑ flag an error| # | Name | Type | Functions | |
|---|---|---|---|---|
| 1 | GND | P | Ground | ⚑ |
| 2 | 3V3 | P | Power supply | ⚑ |
| 3 | EN | I | Chip enable | ⚑ |
| 4 | IO2 | I/O/T | MTMS, GPIO2, LP_GPIO2, LP_UART_RTSN, LP_I2C_SDA, ADC1_CH1, FSPIQ | ⚑ |
| 5 | IO3 | I/O/T | MTDI, GPIO3, LP_GPIO3, LP_UART_CTSN, LP_I2C_SCL, ADC1_CH2 | ⚑ |
| 6 | IO0 | I/O/T | GPIO0, XTAL_32K_P, LP_GPIO0, LP_UART_DTRN | ⚑ |
| 7 | IO1 | I/O/T | GPIO1, XTAL_32K_N, LP_GPIO1, LP_UART_DSRN, ADC1_CH0 | ⚑ |
| 8 | IO6 | I/O/T | GPIO6, LP_GPIO6, ADC1_CH5, FSPICLK | ⚑ |
| 9 | IO7 | I/O/T | GPIO7, FSPID, SDIO_DATA1 | ⚑ |
| 10 | IO8 | I/O/T | GPIO8, PAD_COMP0, SDIO_DATA0 | ⚑ |
| 11 | IO9 | I/O/T | GPIO9, PAD_COMP1, SDIO_CLK | ⚑ |
| 12 | IO10 | I/O/T | GPIO10, FSPICS0, SDIO_CMD | ⚑ |
| 13 | IO13 | I/O/T | GPIO13, USB_D-, SDIO_DATA3 | ⚑ |
| 14 | IO14 | I/O/T | GPIO14, USB_D+, SDIO_DATA2 | ⚑ |
| 15 | IO28 | I/O/T | GPIO28 | ⚑ |
| 16 | IO5 | I/O/T | MTDO, GPIO5, LP_GPIO5, LP_UART_TXD, ADC1_CH4, FSPIWP | ⚑ |
| 17 | IO4 | I/O/T | MTCK, GPIO4, LP_GPIO4, LP_UART_RXD, ADC1_CH3, FSPIHD | ⚑ |
| 18 | IO27 | I/O/T | GPIO27 | ⚑ |
| 19 | NC/IO15 | I/O/T | SPICS1, GPIO15 | ⚑ |
| 20 | NC | - | NC | ⚑ |
| 21 | IO23 | I/O/T | GPIO23 | ⚑ |
| 22 | NC | - | NC | ⚑ |
| 23 | IO24 | I/O/T | GPIO24 | ⚑ |
| 24 | RX0 | I/O/T | U0RXD, GPIO12 | ⚑ |
| 25 | TX0 | I/O/T | U0TXD, GPIO11 | ⚑ |
| 26 | IO25 | I/O/T | GPIO25 | ⚑ |
| 27 | IO26 | I/O/T | GPIO26 | ⚑ |
| 28 | GND | P | Ground | ⚑ |
| 29 | EPAD | P | Ground | ⚑ |
Official datasheet pin-layout figure
Find a pin by function
Pick a capability to see which GPIOs provide it on the ESP32-C5.
Freely usable, no special role.
UART, I²C, SPI (master), I²S, PWM/LEDC and most digital peripherals route through the GPIO matrix — assign them to any pin from “Safe GPIO”. The categories above are the pins tied to a fixed function (analog, USB, crystal…) or that need care.
Strapping pins
⚑ flag an errorGPIOs sampled at reset — avoid driving these at power-up.
| Pin | Default | Bit | Function |
|---|---|---|---|
GPIO7 | floating | — | — |
GPIO25 | floating | — | — |
GPIO26 | floating | — | — |
GPIO27 | pull-up | 1 | — |
GPIO28 | pull-up | 1 | — |
MTMS | floating | — | jtag |
MTDI | floating | — | jtag |
GPIO pin warnings
⚑ flag an errorOn the ESP32-C5, almost any peripheral can be routed to almost any GPIO through the IO MUX, so most pins are free to use. These are the exceptions — pins with a fixed role or a boot-time behaviour to design around.
| Pin | Why it needs care |
|---|---|
GPIO2 | strapping pin (affects boot); JTAG |
GPIO3 | strapping pin (affects boot); JTAG |
GPIO4 | JTAG |
GPIO5 | JTAG |
GPIO7 | strapping pin (affects boot) |
GPIO11 | UART0 console (boot log) |
GPIO12 | UART0 console (boot log) |
GPIO13 | native USB D± |
GPIO14 | native USB D± |
GPIO25 | strapping pin (affects boot) |
GPIO26 | strapping pin (affects boot) |
GPIO27 | strapping pin (affects boot) |
GPIO28 | strapping pin (affects boot) |
Compute & memory
⚑ flag an error| CPU | RISC-V, 1-core |
|---|---|
| Max clock | 240 MHz |
| SRAM | 384 KB |
| ROM | 320 KB |
| Flash options | 4 / 8 / 16 / 32 MB |
| PSRAM | 8 MB (quad) |
| Co-processor | ULP-RISC-V |
Wireless
⚑ flag an error| Wi-Fi | Wi-Fi 6 |
|---|---|
| Wi-Fi bands | 2.4+5GHz |
| Bluetooth | BLE 5.x |
| 802.15.4 (Thread/Zigbee) | Yes |
| Antenna | PCB |
Peripherals & I/O
⚑ flag an error| Usable GPIO | 22 |
|---|---|
| ADC | 6× 12-bit |
| USB | USB-Serial-JTAG |
| UART / SPI / I²C / I²S | 2 / 1 / 1 / 1 |
| TWAI (CAN) | Yes |
| SD/MMC | Yes |
| Ethernet MAC | No |
| Touch | 0 |
Power
⚑ flag an error| Operating voltage | 3.0-3.6 V |
|---|---|
| Deep sleep | — µA |
Physical
⚑ flag an error| Dimensions | 18 × 27.5 × 3.3 mm |
|---|---|
| Pin count | 29 |
| Temp range | -40 to 85 °C |
| Mounting | SMD castellated |
| Lifecycle | New |
Security
⚑ flag an error| Secure boot | Yes |
|---|---|
| Flash encryption | Yes |
| Crypto | AES, SHA, RSA, HMAC, ECC, ECDSA, RNG |
| Digital signature | Yes |
| TRNG | Yes |
Ordering codes
⚑ flag an errorThe orderable part numbers and what each ships with — decoded from the suffix. Confirm against the latest datasheet before ordering.
| Part number | Flash | PSRAM | Temp |
|---|---|---|---|
ESP32-C5-WROOM-1-N4 | 4 MB | — | −40 to 85 °C |
ESP32-C5-WROOM-1-N8R8 | 8 MB | 8 MB (octal) | −40 to 85 °C |
Schematics
Mechanical & CAD
Getting started
Frameworks: Arduino-ESP32 core — partial support · ESP-IDF 5.4+ (Espressif's official SDK) · MicroPython · Matter.
ESP-IDF target: idf.py set-target esp32c5.
The SoC has a built-in USB Serial/JTAG controller, so you can flash and debug over its native USB port with no external adapter.
Open-source projects using this module
Public GitHub projects whose KiCad design files reference the ESP32-C5-WROOM-1.
- ElectronicCats/flipper-addons ★ 122
Flipper addons by Electronic Cats
- melair/ktane ★ 5
Keep Talking and Nobody Explodes - Physical Edition
- us3r-d0e5nt-3x1st/esp32c5-airunit-nano ★ 2
an air-unit based on esp32c5-wroom-1u and ov5640, made for the hx-esp32-cam-fpv project
- 0xnullsect0r/WifiKiwi ★ 0
Frequently asked questions
Does the ESP32-C5-WROOM-1 have Wi-Fi and Bluetooth?
It provides dual-band Wi-Fi 6, Bluetooth LE and 802.15.4 (Thread/Zigbee).
How much memory does the ESP32-C5-WROOM-1 have?
It comes with 4, 8, 16, 32 MB flash options, up to 8 MB of PSRAM, and the ESP32-C5 has 384 KB of on-chip SRAM.
How many GPIO pins does the ESP32-C5-WROOM-1 have?
The module breaks out 22 GPIO, with up to 6 12-bit ADC channels. See the full pinout above.
Can I use the ESP32-C5-WROOM-1 with the Arduino IDE?
Arduino-ESP32 core support is partial; ESP-IDF 5.4 is the most complete option.
How do I flash the ESP32-C5-WROOM-1?
The SoC has a built-in USB Serial/JTAG controller, so you can flash and debug over its native USB port with no external adapter.
Is the ESP32-C5-WROOM-1 5 V tolerant?
No. It runs at 3.0-3.6 V and its GPIO are not 5 V tolerant — level-shift any 5 V signals.
Can I use an external antenna with the ESP32-C5-WROOM-1?
Most Espressif modules are also offered in a "-U" / "-1U" variant that swaps the on-board PCB antenna for a U.FL/IPEX connector for an external antenna — otherwise identical. Check this part's datasheet for the exact variant name.
Further reading
- ESP32-C5-WROOM-1 Datasheet
- ESP32-C5 modules
- Certificates for ESP32-C5-WROOM-1
- Espressif Product Selector
- ESP32-C5 Datasheet
- ESP32-C5 Technical Reference Manual
- ESP32-C5 product page
- ESP-IDF Programming Guide
- Hardware Design Guidelines
- ESP Dev-Kits documentation
- Espressif KiCad libraries (symbols/footprints/3D)