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3 tutorials
Build a single ESP32 + SX1278 LoRa gateway that bridges off-grid LoRa packets to your home Wi-Fi MQTT broker. Sender subscribes, receiver publishes, one channel only, and a real gateway disclosure.
Flash Meshtastic on an ESP32 + LoRa board and you have an off-grid text messaging device with mesh routing, encryption, and battery-friendly operation. No SIM card, no monthly bill, no account.
Wire two ESP32 boards to SX1278 LoRa modules and send packets between them with no Wi-Fi, no internet, no gateway. The wiring, the Sandeep Mistry library, sender code, receiver code, and the urban range truth.