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
| Model | SiP Flash | Operating Temperature (°C) | Module Dimensions (mm) | Antenna |
|---|---|---|---|---|
| ESP8684-MINI-1-H2 | 2 MB | -40 ~ 105 | 13.2 × 16.6 × 2.4 | PCB onboard antenna |
| ESP8684-MINI-1-H4 | 4 MB | -40 ~ 105 | 13.2 × 16.6 × 2.4 | PCB onboard antenna |
| ESP8684-MINI-1U-H2 | 2 MB | -40 ~ 105 | 13.2 × 12.5 × 2.4 | IPEX external antenna connector |
| ESP8684-MINI-1U-H4 | 4 MB | -40 ~ 105 | 13.2 × 12.5 × 2.4 | IPEX external antenna connector |