基于Semtech LoRa and DHT 11长距离温度湿度监控方案
Semtech LoRa 长距离无线技术连接HT 11 Humidity & Temperature Sensor温度湿度传感器,设计用来感测空气中或是环境中的温度湿度以便控制其他设备降温或是除湿.检测器放置远程透过LoRa长距离传输监控场域的状态.
【展示板照片】
【方案方块图】
【系统功能】
使用 LoRa 长距离无线技术可长距离监控危险场域的温度湿度,可确保场域的安全.
【方案特性】
SX1276(Node)特点:
A. LoRaTM Modem
B. 168 dB maximum link budget
C. +20 dBm – 100 mW constant RF output vs. V supply
D. +14 dBm high efficiency PA
E. Programmable bit rate up to 300 kbps
F. High sensitivity: down to -148 dBm
G. Bullet-proof front end: IIP3 = -11 dBm
H. Excellent blocking immunity
I. Low RX current of 9.9 mA, 200 nA register retention
J. Fully integrated synthesizer with a resolution of 61 Hz
K. FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation
L. Built-in bit synchronizer for clock recovery
M. Preamble detection
N. 127 dB Dynamic Range RSSI
O. Automatic RF Sense and CAD with ultra-fast AFC
P. Packet engine up to 256 bytes with CRC
Q. Built-in temperature sensor and low battery indicator
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