LoRa uses license-free sub-gigahertz radio frequency bands like 433 MHz, 868 MHz (Europe), 915 MHz (Australia and North America and Brazil), and 923 MHz (Asia). LoRa has a unique place: long-range and actually extremely low bandwidth - From Don’t stop! What frequency does LoRa use?įig 2. Simple like that!īandwidth specified for LoRa is therefore restricted under an international agreement to 500 kilohertz 250 kilohertz and 125 kilohertz and in Europe further restricted to just 250 kilohertz and 125 kilohertz. It restricts the bandwidth to enables LoRa long-range transmissions while maintaining its low power consumption. If we want to create radio connections for a certain distance we can either increase the transmission power or decrease the bandwidth of the channel.Īnd bandwidth was Semtech’s last resort. The increase of bandwidth should provide a better quality of the signal, better distance range.īut bandwidth is scarce for IoT mainly for its low power profile.Įverybody’s vying for space and bandwidth is valued and restricted in embedded systems.Įngineering involves maximizing performance using minimal resources. But it has no power to spend (a dilemma). LPWAN name is formed by three components: Low Power, Wide Area, and Network. LoRa uses LPWAN standard (Low Power Wide Area Network). The technology covers the physical layer, while other technologies and protocols such as LoRaWAN (Long Range Wide Area Network) cover the upper layers (read more on ). LoRa enables long-range transmissions (more than 10 km in rural areas) with low power consumption. LoRa uses license-free sub-gigahertz radio frequency bands like 433 MHz, 868 MHz (Europe), 915 MHz (Australia and South/North America ), and 923 MHz ( Asia ). In case you didn’t know, LoRa stands for Long Range radio, which is a wireless protocol developed by Semtech (you’ll find their SX127x chipset on Heltec boards).
0 Comments
Leave a Reply. |