jww
January 19, 2021, 8:20pm
#1
Hi all! Recently I came across a few different low-power, long-range networking protocols. These are on unlicensed wavelengths, different from 3G, 4G, WiFi, etc. I was curious if anyone had worked with this before or explored them much:
IEEE 802.11ah is a wireless networking protocol published in 2017 called Wi-Fi HaLow (pronounced "HEY-Low") as an amendment of the IEEE 802.11-2007 wireless networking standard. It uses 900 MHz license-exempt bands to provide extended range Wi-Fi networks, compared to conventional Wi-Fi networks operating in the 2.4 GHz and 5 GHz bands. It also benefits from lower energy consumption, allowing the creation of large groups of stations or sensors that cooperate to share signals, support A benefit o...
DASH7 Alliance Protocol (D7A) is an open source Wireless Sensor and Actuator Network protocol, which operates in the 433 MHz, 868 MHz and 915 MHz unlicensed ISM band/SRD band. DASH7 provides multi-year battery life, range of up to 2 km, low latency for connecting with moving things, a very small open source protocol stack, AES 128-bit shared key encryption support, and data transfer of up to 167 kbit/s. The DASH7 Alliance Protocol is the name of the technology promoted by the non-profit consortiu...
I also saw this similar protocol, but… it is closed.
LoRa (Long Range) is a low-power wide-area network (LPWAN) protocol. It is based on spread spectrum modulation techniques derived from chirp spread spectrum (CSS) technology. It was developed by Cycleo of Grenoble, France and acquired by Semtech, the founding member of the LoRa Alliance.
LoRa uses license-free sub-gigahertz radio frequency bands like 433 MHz, 868 MHz (Europe), 915 MHz (Australia and North America), 865 MHz to 867 MHz (India) and 923 MHz (Asia). LoRa enables long-range transmissi...
