It is based on esp8266 and esp32 automation system. Each module has a web interface for its initial configuration. The modules are managed using the "iot manager" application. This application is released for both android and ios platform. The application connects to a MQTT broker, you can add several brokers and switch between them. All modules also connect to same broker. All esp8266 esp32 are combined and appear in the application as widgets.
There are two configuration options in the web interface of the modules:
Logging of sensors data in this project made with out any server. All data for graf storring in esp flash. You can look any time your sensor history for 2 - 3 days or week in mobile app in graf. And for this option needed only esp.