LORDWORLD ESP32-C3FN4 development board 4MB Flash 160MHz USB-C

Compact RISC-V board for IoT prototypes

The LORDWORLD ESP32-C3FN4 board combines a 32-bit single-core processor running at 160MHz with 2.4GHz Wi-Fi 802.11 b/g/n and Bluetooth 5 LE in a castellated module. It provides 400KB SRAM, 384KB ROM and 4MB Flash for firmware and data storage. Fifteen GPIO pins expose 3 SPI, 1 I2C, 2 UART, 1 I2S and 2 ADC channels for sensor and actuator integration. A USB-C port supplies power and a full-speed serial interface for programming and debug.

Sustained low-power operation

Flexible clock control and independent module power-supply settings let the SoC scale frequency and voltage to match workload demands. The onboard ceramic antenna maintains wireless connectivity while the processor idles or runs at reduced speed. This architecture targets long-term battery-powered deployments where duty-cycled sensor reads and occasional network bursts dominate the duty cycle. Thermal load remains minimal because the single core does not sustain high-frequency compute for extended periods.

Wireless and peripheral limits

The 2.4GHz radio supports only 802.11 b/g/n rates, so throughput caps well below modern 5GHz or 6GHz bands. Bluetooth 5 LE provides low-energy links but not classic audio profiles. Fifteen GPIOs restrict simultaneous high-speed SPI, I2S and ADC usage; developers must multiplex functions when peripheral count grows. The USB-C connector carries USB 2.0 full-speed serial only, not high-speed bulk endpoints or video alternate modes.