• High stability of local boards
• Ability to detect, correct and report errors
• Wireless communication between local boards
• Easy expansion
• No interference

• Using GPRS
• Using MQTT
• Displaying data in chart formats
• Customization option for displaying charts

The local boards send data to the server. They are split into two parts: a gateway board and multiple sensor boards. The gateway forwards sensor data to the server; the sensors send their measurements to the gateway. Communication is wireless. By concentrating complexity in the gateway, it's easier to adapt the platform for different businesses.

The gateway board uses the SIM800C and an onboard nano-SIM to connect to the internet. Because it uses 2G, the platform works in almost all cities and villages. The gateway has been hardened and tested over months with no issues. It can also detect, report, and in some cases correct errors.

The type of sensor boards depends on the user's needs. So far, five types have been designed and fabricated:

• Temperature and Humidity
• Movement detector
• Power detector
• MQ series gas sensor
• Sensors bank

The server receives and stores the data. It also saves weather conditions for users' locations so they can compare them with their business data. The server responds to requests from the Android app and gateway boards.

Server characteristics:

• CPU: 1 core
• RAM: 1GB
• Disk Space: 5GB
• OS: Linux 16.04

The Android application displays the data. It offers main charts and customizable charts, and can display multiple data sources in a single view. Users can set limits and adjust chart properties.

Some chart features:

• Displaying multiple datasets
• Zooming
• Data selection
• Dataset limit display option
• Changeable appearance