Espressif ESP8684 Mini 1/1U ESP32 C2 Module
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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
| 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 |
Effective Date: March 27, 2025
At OpenELAB, we are committed to providing accurate product descriptions and delivering high-quality products. If you experience any issues with your purchase, please notify us within 60 days of the shipment date.
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The standard warranty period for products sold by OpenELAB is 12 months from the date of delivery.
Under this warranty, OpenELAB will make a reasonable effort to repair or replace products free of charge if defects are due to issues with raw materials, design, or manufacturing.
If the defect qualifies under this policy but falls outside the covered scope, reasonable charges may apply for repair or replacement.
After the warranty period, support may still be available at a reasonable fee.
Warranty Exclusions
The warranty does not apply in the following cases:
- The product is beyond the 12-month warranty period.
- Damage due to misuse, improper maintenance or storage, or failure to follow the user guide or manual.
- Issues caused by Force Majeure events (e.g., natural disasters, war, legal changes, etc.).
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