描述
Dragino LoRa Shield – LoRA 無線通訊擴展板 868MHZ
Dragino LoRa Shield 是Arduino 擴展板形式的長距離收發器，基於開源庫. LoRa Shield 允許用戶發送數據並在低數據速率下達到極長的距離。它提供超長距離擴展頻譜通信和高抗干擾性，同時最小化電流消耗。基於 RFM95W 的LoRa Shield專門針對灌溉系統，智能計量，智能城市，智能手機檢測，樓宇自動化等專業無線傳感器網絡應用。
使用Hope RF的專利 LoRa™ 調製技術，LoRa Shield可以使用低成本晶體和物料清單，實現超過 -148dBm 的靈敏度。高靈敏度與集成的+ 20 dBm功率放大器相結合，產生業界領先的鏈路預算，使其適用於任何需要範圍或穩健性的應用。與常規調製技術相比，LoRa™在阻斷和選擇性方面也提供了顯著的優勢，解決了傳統設計在範圍，抗干擾性和能耗之間的妥協。
這些器件還支持包括WMBus，IEEE802.15.4g在內的高性能（G）FSK模式。LoRa Shield提供卓越的相位噪聲，選擇性，接收器線性度和IIP3，比競爭器件的電流消耗顯著降低。
特徵
- • 兼容3.3v或5v I / O Arduino闆卡。
- • 頻段：868兆赫
- • 低功耗
- • 與Arduino Leonardo，Uno，Mega，DUE兼容
- • 通過 I-Pex 連接器的外部天線
規範
- 最大168 dB的鏈路預算。
- +20 dBm – 100 mW恆定RF輸出與
- +14 dBm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。
- 優異的阻斷免疫力。
- 低的RX電流10.3 mA，200 nA寄存器保留。
- 完全集成的合成器，分辨率為61 Hz。
- FSK，GFSK，MSK，GMSK，LoRa™和OOK調製。
- 內置的時鐘恢復比特同步器。
- 前導碼檢測。
- 127 dB動態範圍RSSI。
- 自動RF Sense和CAD超快速AFC。
- 帶有CRC的分組引擎最多256個字節。
- 內置溫度傳感器和電量不足指示器。
原廠技術文件與教學
Dragino LoRa Shield – support 868M frequency
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
Technical Details
| Weight | G.W 44g |
| Battery | Exclude |
Part List
| LoRa Shield (support 868M frequency) | 1 |
| 868~915Mhz Antenna | 1 |
