ESP32-C3-DevKitM-1

The ESP32-C3-DevKitM-1 development board is one of Espressif’s official boards. This board is based on the ESP32-C3-MINI-1 module, with the ESP32-C3 as the core.

Specifications

• Small sized 2.4 GHz Wi-Fi (802.11b/g/n) and Bluetooth® 5 module

• Built around ESP32-C3 series of SoCs, RISC-V single-core microprocessor

• 4 MB flash in chip package

• 15 available GPIOs (module)

• Peripherals

  • 22 × programmable GPIOs

  • Digital interfaces:

  • 3 × SPI

  • 2 × UART

  • 1 × I2C

  • 1 × I2S

  • Remote control peripheral, with 2 transmit channels and 2 receive channels

  • LED PWM controller, with up to 6 channels

  • Full-speed USB Serial/JTAG controller

  • General DMA controller (GDMA), with 3 transmit channels and 3 receive channels

  • 1 × TWAI® controller (compatible with ISO 11898-1)

  • Analog interfaces:

    • 2 × 12-bit SAR ADCs, up to 6 channels

    • 1 × temperature sensor

  • Timers:

    • 2 × 54-bit general-purpose timers

    • 3 × watchdog timers

    • 1 × 52-bit system timer

• PCB antenna or external antenna connector

Header Block

Note

Not all of the chip pins are exposed to the pin headers.

J1

No.	Name	Type [1]	Function
1	GND	G	Ground
2	3V3	P	3.3 V power supply
3	3V3	P	3.3 V power supply
4	IO2	I/O/T	GPIO2 [2], ADC1_CH2, FSPIQ
5	IO3	I/O/T	GPIO3, ADC1_CH3
6	GND	G	Ground
7	RST	I	CHIP_PU
8	GND	G	Ground
9	IO0	I/O/T	GPIO0, ADC1_CH0, XTAL_32K_P
10	IO1	I/O/T	GPIO1, ADC1_CH1, XTAL_32K_N
11	IO10	I/O/T	GPIO10, FSPICS0
12	GND	G	Ground
13	5V	P	5 V power supply
14	5V	P	5 V power supply
15	GND	G	Ground

J3

No.	Name	Type [1]	Function
1	GND	G	Ground
2	TX	I/O/T	GPIO21, U0TXD
3	RX	I/O/T	GPIO20, U0RXD
4	GND	G	Ground
5	IO9	I/O/T	GPIO9 [2]
6	IO8	I/O/T	GPIO8 [2], RGB LED
7	GND	G	Ground
8	IO7	I/O/T	GPIO7, FSPID, MTDO
9	IO6	I/O/T	GPIO6, FSPICLK, MTCK
10	IO5	I/O/T	GPIO5, ADC2_CH0, FSPIWP, MTDI
11	IO4	I/O/T	GPIO4, ADC1_CH4, FSPIHD, MTMS
12	GND	G	Ground
13	IO18	I/O/T	GPIO18, USB_D-
14	IO19	I/O/T	GPIO19, USB_D+
15	GND	G	Ground

[1] (1,2)

P: Power supply; I: Input; O: Output; T: High impedance.

[2] (1,2,3)

GPIO2, GPIO8, and GPIO9 are strapping pins of the ESP32-C3FN4 chip. During the chip’s system reset, the latches of the strapping pins sample the voltage level as strapping bits, and hold these bits until the chip is powered down or shut down.

Pin Layout

Strapping Pins

Some of the GPIO’s have important features during the booting process. Here is the list of the strapping pins on the ESP32-C3.

GPIO	Default	Function	Pull-up	Pull-down
IO2	N/A	Booting Mode	See ESP32-C3	See ESP32-C3
IO9	Pull-up	Booting Mode	SPI Boot	Download Boot
IO8	N/A	Booting Mode	Don’t Care	Download Boot
IO8	Pull-up	Enabling/Disabling Log Print	See ESP32-C3	See ESP32-C3

For more detailed information, see the ESP32-C3 datasheet.

Resources

• ESP32-C3 (Datasheet)

• ESP32-C3-MINI-1 (Datasheet)