No Wi‑Fi? No problem. In this video I show how I send simple wireless commands using LoRa and an ESP32—no router, no internet, just two boards talking over UART. I’m using a pair of ESP32‑S3 dev boards and two REYAX RYLR998 LoRa transceiver modules (they were sent to me at no cost for an honest review). The starter demo is intentionally beginner-friendly: one ESP32 is a transmitter with a pushbutton, and the other ESP32 is a receiver that turns an LED on and off. I walk through the wiring (TX/RX, 3.3V power, and ground) and I stress the big gotcha: these modules are 3.3V, so don’t feed them more than that. Then we get into the “meat and potatoes” with the RYLR998 modules—AT commands. I set a unique address for each device, match the network ID and RF frequency on both ends, and use the parameter command (spreading factor, bandwidth, coding rate, preamble) so the radios can actually talk. On the receiver side, the code just listens for serial text and looks for “on” or “off,” which keeps the Arduino code clean and easy to build on. I finish with a quick room-range demo and talk about future tests with different sensors, obstacles, and longer distances.