Rust ESP Board

Welcome to the Rust ESP Development board project. This repository contains everything you will need to build the board yourself.

Where to buy

• ESP32-C3-DevKit-RUST-1
• AliExpress Espressif Official Store
• Mouser Electronics

Ferrous Systems Training

• Training Book: Explore the power of Rust on the new Espressif board
  • Training Material

Project Specification

This board is based on the ESP32-C3, and includes sensors, LEDs, buttons, a battery charger, and USB type-C connector.

SoC Features

• IEEE 802.11 b/g/n-compliant
• Bluetooth 5, Bluetooth mesh
• 32-bit RISC-V single-core processor, up to 160MHz
• 384 KB ROM
• 400 KB SRAM (16 KB for cache)
• 8 KB SRAM in RTC
• 22 × programmable GPIOs
• 3 × SPI
• 2 × UART
• 1 × I2C
• 1 × I2S
• 2 × 54-bit general-purpose timers
• 3 × watchdog timers
• 1 × 52-bit system timer
• Remote Control Peripheral (RMT)
• LED PWM controller (LEDC)
• Full-speed USB Serial/JTAG controller
• General DMA controller (GDMA)
• 1 × TWAI®
• 2 × 12-bit SAR ADCs, up to 6 channels
• 1 × temperature sensor

For the complete description, see the ESP32-C3 Datasheet.

I2C Peripherals

This board includes the following peripherals over the I2C bus:

Peripheral	Part number	Reference	Crate	Address
IMU	ICM-42670-P	Datasheet	Link	0x68
Temperature and Humidity	SHTC3	Datasheet	Link	0x70

I2C Bus Connection

Signal	GPIO
SDA	GPIO10
SCL	GPIO8

I/Os

The following devices are connected through GPIO:

I/O Devices	GPIO
WS2812 LED	GPIO2
LED	GPIO7
Button/Boot	GPIO9

Power

• USB type-C (no PD compatibility).
• Li-Ion battery charger - MCP73831T-2ACI/OT, it charges up to 4.2V.
  • Recommendation: MCP73831T-2ACI/OT does not provide battery protection for over-current or over-discharge. For the battery (Li-Ion or Li-Po), it's recommended the ones with embedded protection
  • Limitation: reading the battery voltage is not supported.

Pin Layout

Left Side

Pin Number	Description	SoC
1	Reset	EN/CHIP_PU
2	3V3
3	N/C
4	GND
5	IO0/ADC1-0	GPIO0
6	IO1/ADC1-1	GPIO1
7	IO2/ADC1-2	GPIO2
8	IO3/ADC1-3	GPIO3
9	IO4/ADC2-0	GPIO4
10	IO5/ADC2-1	GPIO5
11	IO6/MTCK	GPIO6
12	IO7/MTDO/LED	GPIO7
13	IO9/LOG	GPIO8
14	IO21/U0RXD	GPIO21
15	IO20/U0TXD	GPIO20
16	IO9/BOOT	GPIO9

Right Side

Pin Number	Description	SoC
1	VBAT
2	EN [1]
3	VBUS [2]
4	NC
5	NC
6	NC
7	NC
8	NC
9	IO18/USB_D-	GPIO18
10	IO19/USB_D+	GPIO19
11	IO8/SCL	GPIO8
12	IO10/SDA	GPIO10

• [1] Connected to LDO enable pin*
• [2] Connected to USB 5V*

Project KiCad Libraries

• ESP32C3

Board Design

Top

Bottom

Bill of Material

Interactive BOM

Case

Case 3D Printing Model