The Espressif ESP32-C3-MINI-1-N4 is a compact 2.4GHz Wi-Fi and Bluetooth 5 Low Energy wireless module integrating an ESP32-C3 SoC, a 40MHz crystal oscillator, 4MB Quad SPI flash, and an onboard PCB antenna. It is designed for smart home, industrial automation, consumer electronics, smart agriculture, low-power IoT sensors, and wireless data-logging applications.
The module features a 32-bit single-core RISC-V processor running at up to 160MHz, along with 384KB ROM, 400KB SRAM including 16KB cache, and 8KB RTC SRAM. The ESP32-C3-MINI-1-N4 specifically integrates 4MB of Quad SPI flash.
Wireless connectivity includes IEEE 802.11 b/g/n Wi-Fi in the 2.4GHz band, with 20MHz and 40MHz channel bandwidths and data rates of up to 150Mbps in 1T1R mode. It also supports Bluetooth 5 Low Energy and Bluetooth Mesh, with 125Kbps, 500Kbps, 1Mbps, and 2Mbps PHY modes.
The module exposes up to 15 GPIOs and supports SPI, UART, I²C, I²S, LED PWM, TWAI, USB Serial/JTAG, and other peripherals. Recommended supply voltage is 3.0V to 3.6V, with 3.3V nominal operation. The N4 variant is rated for an ambient operating temperature range of -40°C to +85°C. Module dimensions are approximately 13.2 × 16.6 × 2.4mm, and the module is rated MSL 3.
According to Espressif’s current v2.2 datasheet dated May 6, 2026, the ESP32-C3-MINI-1-N4 is NRND, or Not Recommended for New Designs. For new designs, Espressif recommends the ESP32-C3-MINI-1-N4X, which also provides 4MB flash but uses the newer v1.1 chip revision.
Key Features:
- Manufacturer: Espressif Systems
- Part Number: ESP32-C3-MINI-1-N4
- Series: ESP32-C3-MINI-1
- Device Type: Wi-Fi + Bluetooth LE Module
- CPU: 32-Bit Single-Core RISC-V
- Maximum CPU Frequency: 160MHz
- ROM: 384KB
- SRAM: 400KB
- RTC SRAM: 8KB
- Flash: 4MB Quad SPI
- Wi-Fi: IEEE 802.11 b/g/n
- Wi-Fi Band: 2.4GHz
- Wi-Fi Data Rate: Up to 150Mbps
- Wi-Fi Mode: 1T1R
- Bluetooth: Bluetooth 5 LE
- Bluetooth Mesh: Supported
- Bluetooth PHY: 125Kbps / 500Kbps / 1Mbps / 2Mbps
- GPIOs: Up to 15
- Interfaces: SPI / UART / I²C / I²S / PWM / TWAI / USB Serial-JTAG
- Antenna: Onboard PCB Antenna
- Supply Voltage: 3.0V to 3.6V
- Nominal Supply: 3.3V
- Operating Temperature: -40°C to +85°C
- Module Size: Approx. 13.2 × 16.6 × 2.4mm
- MSL: Level 3
- RoHS / REACH Compliant
- Product Status: NRND
- Recommended New-Design Variant: ESP32-C3-MINI-1-N4X.
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