Espressif ESP8684 Mini 1/1U ESP32 C2 Module

The ESP8684-MINI-1 and ESP8684-MINI-1U are general-purpose Wi-Fi and Bluetooth Low Energy (Bluetooth LE) modules, featuring a compact size and a variety of peripheral interfaces. They are suitable for applications in smart home, industrial automation, healthcare, consumer electronics, and more. The ESP8684-MINI-1 uses a PCB onboard antenna, while the ESP8684-MINI-1U is designed with a connector for an external antenna. Both modules come in two variants, equipped with either the ESP8684H2 or ESP8684H4 chip.

The ESP8684H2 and ESP8684H4 chips belong to the ESP8684 series, featuring a RISC-V 32-bit single-core processor. The ESP8684 series chips integrate a variety of peripherals, including UART, I2C, LED PWM controller, general DMA controller, temperature sensor, SAR analog-to-digital converter, and support for single-wire, dual-wire, and quad-wire SPI interfaces.

Features

CPU and On-Chip Memory

• Integrated ESP8684H2 or ESP8684H4 chip, RISC-V 32-bit single-core microprocessor with a maximum clock speed of 120 MHz
• 576 KB ROM
• 272 KB SRAM (16 KB reserved for cache)
• SiP flash (varies by model, see Table 1 for ordering information)
• Flash controller with a cache mechanism
• Supports in-circuit programming (ICP) for flash

Wi-Fi

• Supports IEEE 802.11 b/g/n protocol
• Operating channel center frequency range: 2412 ~ 2484 MHz
• 20 MHz bandwidth support in the 2.4 GHz band
• 1T1R mode with data rates up to 72.2 Mbps
• Wireless Multimedia (WMM)
• Frame aggregation (TX/RX A-MPDU, TX/RX A-MSDU)
• Immediate Block ACK
• Fragmentation and defragmentation
• Transmit opportunity (TXOP)
• Beacon auto-detection (hardware TSF)
• 3 virtual Wi-Fi interfaces
• Supports infrastructure network (Infrastructure BSS) with Station mode, SoftAP mode, Station + SoftAP mode, and promiscuous mode
  Note: In Station mode, when scanning, the SoftAP channel will change simultaneously.

Bluetooth®

• Bluetooth Low Energy (Bluetooth LE): Bluetooth 5
• High power mode (20 dBm)
• Supports data rates of 125 kbps, 500 kbps, 1 Mbps, and 2 Mbps
• Advertising Extensions
• Multiple Advertisement Sets
• Channel Selection Algorithm #2
• Wi-Fi and Bluetooth coexist using a shared antenna

Peripherals

• GPIO, SPI, UART, I2C, LED PWM controller, general DMA controller, temperature sensor, SAR analog-to-digital converter

Module Integrated Components

• 26 MHz integrated crystal oscillator

Antenna Options

• Onboard PCB antenna (ESP8684-MINI-1)
• Connector for external antenna (ESP8684-MINI-1U)

Operating Conditions

• Operating voltage/power supply voltage: 3.0 ~ 3.6 V
• Operating temperature: -40 ~ 105 °C

Comparison of ESP8684-MINI-1/1U Model Specifications