ESP32 + LoRa: Meshtastic, the off-grid mesh firmware
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.
Tag
#mesh
3 tutorials
ESP32: ESP-MESH, a self-healing Wi-Fi network
Build a multi-hop Wi-Fi network with multiple ESP32 boards. Self-healing, automatic routing, no central router needed.
ESP32: ESP-NOW, peer-to-peer messages without a router
Send messages between ESP32 boards directly, without Wi-Fi infrastructure. Up to 250 bytes per packet, up to 20 peers, range of 200m+ line of sight.