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Dragino LoRa Shield 擴充板 - 支持 868M 頻率
資料來源：https://www.seeedstudio.com/Dragino-LoRa-Shield---support-868M-frequency-p-2651.html
Description
The Dragino LoRa Shield is a long range transceiver on a Arduino shield form factor and based on Open source library.The LoRa Shield allows the user to send data and reach extremely long ranges at low data-rates.It provides ultra-long range spread spectrum communication and high interference immunity whilst minimising current consumption.
The LoRa Shield based on RFM95W targets professional wireless sensor network applications such as irrigation systems, smart metering, smart cities, smartphone detection, building automation, and so on.
Using Hope RF’s patented LoRa™ modulation technique the LoRa Shield can achieve a sensitivity of over -148dBm using a low cost crystal and bill of materials. The high sensitivity combined with the integrated +20 dBm power amplifier yields industry leading link budget making it optimal for any application requiring range or robustness. LoRa™ also provides significant advantages in both blocking and selectivity over conventional modulation techniques, solving the traditional design compromise between range, interference immunity and energy consumption.
These devices also support high performance (G)FSK modes for systems including WMBus, IEEE802.15.4g. The LoRa Shield deliver exceptional phase noise, selectivity, receiver linearity and IIP3 for significantly lower current consumption than competing devices.
FEATURES
• Compatible with 3.3v or 5v I/O Arduino Board.
• Frequency Band: 868 MHZ
• Low power consumption
• Compatible with Arduino Leonardo, Uno, Mega, DUE
• External Antenna via I-Pex connector
SPECIFICATION
• 168 dB maximum link budget.
• +20 dBm - 100 mW constant RF output vs.
• +14 dBm high efficiency PA.
• Programmable bit rate up to 300 kbps.
• High sensitivity: down to -148 dBm.
• Bullet-proof front end: IIP3 = -12.5 dBm.
• Excellent blocking immunity.
• Low RX current of 10.3 mA, 200 nA register retention.
• Fully integrated synthesizer with a resolution of 61 Hz.
• FSK, GFSK, MSK, GMSK, LoRa™ and OOK modulation.
• Built-in bit synchronizer for clock recovery.
• Preamble detection.
• 127 dB Dynamic Range RSSI.
• Automatic RF Sense and CAD with ultra-fast AFC.
• Packet engine up to 256 bytes with CRC.
• Built-in temperature sensor and low battery indicator.
PART LIST
• 1 x LoRa Shield (support 868M frequency)
• 1 x 868~915Mhz Antenna
RELATED PRODUCTS
 |
| Dragino LoRa Shield - support 433M frequency |
Technical Details
| Weight | G.W 44g |
| Battery | Exclude |
Part List
| LoRa Shield (support 868M frequency) | 1 |
| 868~915Mhz Antenna | 1 |
描述
該 Dragino LoRa Shield 是一個基於開源函式庫的 Arduino 長距離收發器。The LORA Shield 允許以低 data-rates 發送數據，並達到極長的範圍內。提供超長距離展頻用戶通信、高抗干擾性、同時最大限度地減少電流消耗。
基於 RFM95W 的 LoRa Shield 針對專業的無線傳感器網絡應用，如灌溉系統，智能電錶，智能城市，智能檢測，樓宇自動化等。
使用 Hope RF 之專利 LoRa™ 調變技術的 LoRa Shield 利用低成本的晶體和材料清單可以達到超過 -148dBm 的靈敏度。高靈敏度與集成+20 dBm的功率放大收益率行業領先的鏈路預算，使得它最適合於要求範圍或穩健性的應用程序相結合。 LoRa™ 還提供了阻塞和選擇性，比傳統的調製技術具備更顯著的優勢，以折衷解決範圍、抗干擾性、和能量消耗。
這些器件還支持高性能 (G)FSK 模式的系統，包括 WMBus，IEEE802.15.4g 等。LoRa Shield 提供卓越的相位噪聲、選擇性、接收器的線性度和 IIP3，電流消耗亦比同類器件顯著降低。
特徵
- 使用 3.3V 或 5V 的 I/O Arduino 板兼容。
- 頻段：868 MHZ / 433 MHZ（預配置的工廠）
- 低功耗
- Arduino Leonardo, Uno, Mega, DUE 都相容
- 通過 I-PEX 連接外部天線
規範
- 168 dB 最大鏈路預算。
- +20 dBm - 100mW 恆定 RF 輸出與
- +14dBm 高效率 PA。
- 可編程比特率高達 300 kbps。
- 高靈敏度：低至 -148 dBm。
- 防彈前端：IIP3 = -12.5 dBm。
- 優異的阻塞抑制免疫力。
- 10.3 mA 低電流 RX，200 nA 登記保留。
- 完全集成的合成器，具有 61 Hz 分辨率。
- FSK、GFSK、MSK、GMSK、LoRa™ 和 OOK 調變。
- 內置位同步時鐘恢復。
- Preamble detection。
- 127 dB 動態範圍 RSSI。
- 自動 RF 檢測和 CAD，具有超快 AFC。
- 封包引擎到與 CRC 256 bytes。
- 內置溫度傳感器和低電量指示燈。
零件清單
- 1 x LoRa Shield（支持 868M 頻率）
- 1 x 868~915Mhz 天線
文件
- 用戶手冊
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| Dragino LORA盾-支持433M頻率 |
