Figure 3 from A tablet-controlled, mesh-network security system: an architecture for a secure, mesh network of security and automation systems using Arduino and Zigbee controllers and an Android tablet application | Semantic
MiniSWARM - Arduino WiFi Mesh
80+ ESP8266 NodeMCU Projects, Tutorials and Guides with Arduino IDE | Random Nerd Tutorials | Arduino, Iot projects, Electronics basics
Creating NodeMCU Mesh Network using ESP12 and Arduino IDE
Home Automation W/O Router or Internet | Mesh Networking ♻️ - YouTube