The ESP32-C3 is a low-power, low-cost microcontroller (MCU) developed by Espressif Systems, based on the RISC-V architecture. It is part of the ESP32 family and is especially suited for IoT, smart home, and wearable applications, where security, Wi-Fi connectivity, and low power consumption are important.
| Category | Specification |
|---|---|
| CPU | 32-bit RISC-V single-core processor |
| Max Clock Speed | 160 MHz |
| Instruction Set | RV32IMC (Integer, Multiply, Compressed) |
| ROM | 384 KB |
| SRAM | 400 KB |
| RTC SRAM | 8 KB (retained in deep sleep) |
| External Flash | Supports up to 16 MB (via SPI) |
| Wi-Fi | IEEE 802.11 b/g/n (2.4 GHz) |
| Bluetooth | Bluetooth 5 (LE), Mesh, Long Range |
| GPIOs | Up to 22 (multiplexed) |
| ADC | 12-bit, up to 5 channels |
| UART | 2 |
| SPI | 2 |
| I2C | 1 |
| I2S | 1 |
| PWM | Yes (via LEDC – LED control PWM controller) |
| RMT | Yes (Remote Control Module) |
| Security | – Secure Boot- Flash Encryption- AES, SHA, RSA, ECC, RNG (Hardware Accel) |
| Power Modes | – Active- Modem Sleep- Light Sleep- Deep Sleep |
| Low Power Co-processor | Yes |
| Operating Voltage | 3.0V to 3.6V |
| Package Options | QFN32 (5×5 mm), QFN40 (6×6 mm) |
| Development Tools | ESP-IDF, Arduino, PlatformIO, MicroPython, Rust (experimental) |
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