LoRa (long-range) technology is widely used in IoT applications for its ability to transmit data over long distances without requiring internet access. While LoRa itself is not inherently a mesh networking technology, projects like Meshtastic leverage it to create long-distance mesh networks. However, our experiment takes a more visual approach — using a camera speedlight to measure the actual range of LoRa modules. How far can we push this technology in a real-world urban setting? Let's find out. Understanding LoRa technologyLoRa operates in the sub-gigahertz frequency range, offering a significantly greater range than Wi-Fi or Bluetooth at the cost of bandwidth. Unlike Wi-Fi, which typically operates at 2.4 GHz or 5 GHz, LoRa uses lower frequencies to achieve long-distance communication. The actual transmission frequency varies depending on your region, so it's essential to check legal operating frequencies before using LoRa devices. One of LoRa's most significant advantages is its...more
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