Features / Specs
- Main IC: Espressif ESP32-C3FH4 (32-bit RISC-V single-core processor, up to 160 MHz)
- Flash Memory: 4 MB
- ROM: 384 kB
- SRAM: 400 kB (16 kB usable as cache)
- SRAM in RTC: 8 kB
- USB Connector Type: USB Type-C female socket
- Power Input Options:
- USB Type-C Socket: 5 VDC
- 5V Pin (Regulated Input): 3.3 V – 6 VDC, passes through onboard regulator
- 3V3 Pin (Direct Input): 3.3 VDC only, bypasses onboard regulator, feeds chip directly
- ESP Chip Operating Voltage: 3.3 VDC
- Operating Temperature: -40 °C to +105 °C (ESP32-C3FH4 rating)
- Usable Peripherals (This Board): 2x UART / 1x I2C / 1x I2S / 1x general-purpose SPI / 2x 12-bit SAR ADCs (6 channels total – 5 on ADC1, 1 on ADC2) / 11x GPIO pins
- Full Chip Capabilities (Not All Exposed on This Board): 22x programmable GPIOs / 3x SPI (2 reserved for flash access, 1 general-purpose) / 1x I2S / 2x UART / 1x I2C / LED PWM controller (up to 6 channels)
- Number of Pins: 16
- Pin Pitch: 2.54 mm
- Dimensions: ~(22.52 mm x 18 mm x 4.1 mm)
- Spacing Between Pin Rows (Pin Center to Center): ~15.24 mm (breadboard compatible)
- WiFi Protocols: 802.11 b/g/n (1T1R mode with data rate up to 150 Mbps)
- Frequency Band: 2.4 GHz (supports 20 MHz and 40 MHz bandwidth)
- Wireless Network Modes: Station / SoftAP / SoftAP + Station / Promiscuous Mode
- WiFi Security: Secure Boot / Flash Encryption / 4 kbit OTP, up to 1792 bits for users / Cryptographic Hardware Acceleration
- Bluetooth Protocols: Bluetooth LE – Bluetooth 5, Bluetooth Mesh
- Power: Up to 20 dBm
- Speeds: 125 kbps / 500 kbps / 1 Mbps / 2 Mbps
- Advertising Features: Advertising Extensions / Multiple Advertising Sets
- Other Features: Internal co-existence mechanism allowing WiFi and Bluetooth to share a single antenna
