ESP32-C3
This page is specifically about the ESP32-C3-DevKit-Rust Hardware.
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
Documents
- ESP32-C3 - A Comprehensive guide to IoT
- ESP32-C3 Datasheet
- ESP-RS Schematic
- ESP-RS Assembly
- TDK 6 Axis MEMS Sensor ICM 42670
- Sensirion Humidity and Temperature Sensor SHTC3
Links
- Espressif ESP32-C3 - Product page
- Espressive ESP32-C3-DevKit-Rust
## Board
Peripherals
Pin Layout
| Left Description |
Left SoC |
Pin Number |
Right Description |
Right SoC |
|---|---|---|---|---|
| Reset | EN/CHIP_PU |
1 | VBAT | |
| 3V3 | 2 | EN [1] | ||
| N/C | 3 | VBUS [2] | ||
| GND | 4 | NC | ||
| IO0/ADC1-0 | GPIO0 |
5 | NC | |
| IO1/ADC1-1 | GPIO1 |
6 | NC | |
| IO2/ADC1-2 | GPIO2 |
7 | NC | |
| IO3/ADC1-3 | GPIO3 |
8 | NC | |
| IO4/ADC2-0 | GPIO4 |
9 | IO18/USB_D- | GPIO18 |
| IO5/ADC2-1 | GPIO5 |
10 | IO19/USB_D+ | GPIO19 |
| IO6/MTCK | GPIO6 |
11 | IO8/SCL | GPIO8 |
| IO7/MTDO/LED | GPIO7 |
12 | IO10/SDA | GPIO10 |
| IO9/LOG | GPIO8 |
13 | - | - |
| IO21/U0RXD | GPIO21 |
14 | - | - |
| IO20/U0TXD | GPIO20 |
15 | - | - |
| IO9/BOOT | GPIO9 |
16 | - | - |
- [1] Connected to LDO enable pin*
- [2] Connected to USB 5V*
I/Os
The following devices are connected through GPIO:
| I/O Devices | GPIO |
|---|---|
| WS2812 LED | GPIO2 |
| LED | GPIO7 |
| Button/Boot | GPIO9 |
I2C
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 |
Power
- USB type-C.
- 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.
Board Design
