As seen at the bottom of this system, data is collected from different sensors (temperature, humidity, pressure, etc). These data are transferred to the database with different communication methods. Collected data are also transferred to mobile devices via web services over the cloud system. Make the general database design of this system and draw the ER Diagram.

Server 1 Server N Database 1 Database N Web Service Provider Cellular Network GPRS Mobile Device Web Service Reporting Router ADSL VON 1/Base 1 Web Service VON n/Basen MQTT Web Service Text File Collector/Storage/Parser VTN k/CN K A1 VTN 1/CN 1 VON 2/Base 2 VTN 1/CN 1 An VTN n/CNN VTN 1/CN 1 VTN m/CN m MQTT Text File Collector/Parser Ai A1 Ai Ag Data Collector/Text File Producer S10000Sd A1 Arduino, Ethernet WeMOS, WiFi Si ......Sd Ag , Arduino, BLE $1 VON 1/Base 1 VTN 1/CN 1 Veri Odak Noktas, Raspberry Pi - Mainboard Veri Toplama Noktas, Raspberry Pi - Arduino Sensor, Wired Sensor, WiFi Ag Az Sensor, BLE Server 1 Server N Database 1 Database N Web Service Provider Cellular Network GPRS Mobile Device Web Service Reporting Router ADSL VON 1/Base 1 Web Service VON n/Basen MQTT Web Service Text File Collector/Storage/Parser VTN k/CN K A1 VTN 1/CN 1 VON 2/Base 2 VTN 1/CN 1 An VTN n/CNN VTN 1/CN 1 VTN m/CN m MQTT Text File Collector/Parser Ai A1 Ai Ag Data Collector/Text File Producer S10000Sd A1 Arduino, Ethernet WeMOS, WiFi Si ......Sd Ag , Arduino, BLE $1 VON 1/Base 1 VTN 1/CN 1 Veri Odak Noktas, Raspberry Pi - Mainboard Veri Toplama Noktas, Raspberry Pi - Arduino Sensor, Wired Sensor, WiFi Ag Az Sensor, BLE