• 1
    Introduction

    Hey, what's up, Guys! Akarsh here from CETech.

    No Internet No Problem As LoRa is up to the rescue. LoRa is a Technology with the help of which we can easily transmit data to a range of kilometres without any Internet and today we are going to discuss a module named EdgeX from MatchX which works on the amazing LoRa Technology. The best part is that it is ML and AI-based and is very much suitable for the Transmission of Image and Video data over hundreds of kilometres that too without the Internet. So Let's get to the fun part now.

  • 2
    Get PCBs for Your Projects Manufactured

    You must check out PCBWAY for ordering PCBs online for cheap!

    You get 10 good quality PCBs manufactured and shipped to your doorstep for cheap. You will also get a discount on shipping on your first order. Upload your Gerber files onto PCBWAY to get them manufactured with good quality and quick turnaround time. Check out their online Gerber viewer function. With reward points, you can get free stuff from their gift shop.

  • 3
    What Is LoRa?

    LoRa (Long Range) is a low-power wide-area network (LPWAN) protocol developed by Semtech. It is based on spread spectrum modulation techniques derived from chirp spread spectrum (CSS) technology.

    LoRa uses license-free sub-gigahertz radio frequency bands like 433 MHz, 868 MHz (Europe), 915 MHz (Australia and North America), and 923 MHz (Asia). LoRa enables long-range transmissions (more than 10 km in rural areas) with low power consumption. The technology covers the physical layer, while other technologies and protocols such as LoRaWAN (Long Range Wide Area Network) cover the upper layers.

    LoRa devices have geolocation capabilities used for trilaterating positions of devices via timestamps from gateways. LoRa and LoRaWAN permit long-range connectivity for the Internet of things (IoT) devices in different types of industries.

    The spread spectrum LoRa modulation is performed by representing each bit of payload information by multiple chirps of information. The rate at which the spread information is sent is referred to as the symbol rate, the ratio between the nominal symbol rate and chirp rate is the spreading factor (SF) and represents the number of symbols sent per bit of information. LoRa can trade-off data rates for sensitivity with a fixed channel bandwidth by selecting the amount of spread used (a selectable radio parameter from 7 to 12). Lower SF means more chirps are sent per second; hence, you can encode more data per second. Higher SF implies fewer chirps per second; hence, there are less data to encode per second. Compared to lower SF, sending the same amount of data with higher SF needs more transmission time, known as airtime. More airtime means that the modem is up and running longer and consuming more energy. The benefit of high SF is that more extended airtime gives the receiver more opportunities to sample the signal power which results in better sensitivity. In addition, LoRa uses forward error correction coding to improve resilience against interference. LoRa's high range is characterized by high wireless link budgets of around 155 dB to 170 dB