In urban sanitation management, garbage can is a very important part. Intelligent sanitation management is an arduous task for garbage classification and recycling in smart city. Now the garbage classification policy has been released, and the demand for intelligent garbage management is growing, while the garbage cans around us are basically in non intelligent state. Sanitation workers need to constantly check whether the garbage cans are in non intelligent state every day It's full. Many times, the dustbin is full, but it can't be cleaned in time. Flies fly everywhere, and the smell of garbage is also distributed nearby, which brings great difficulties to the urban health work.

        Sometimes there is no garbage in the dustbin in a day, and sanitation workers have to waste time to patrol several times. The most serious is that if someone throws cigarette butts into the dustbin at will, it will cause garbage burning and fire, with unimaginable consequences. Cleaning workers not only have to undertake the daily work of cleaning the streets, but also spend a lot of time on the maintenance of garbage cans every day. For many areas with small population but large area, the management of garbage can is more time-consuming and labor-consuming.

        Smart trash can has been used in foreign countries for a long time. Sensors transmit the sensor data collected from trash can and garbage collection place to Lora gateway thousands of meters away through low-power Lora network. The gateway then transmits the data to the server. By analyzing the sensor data, the garbage manager can more intuitively understand the filling status of each trash can in the jurisdiction and keep it clean The best recycling route for the vehicles. 

        Lora technology deployment:

        Full bin sensor: light sensor. When the bin is full, the sensor will send the data to Lora terminal or module. Lora communication will automatically send the full garbage information to the garbage disposal center online. After receiving the information, the garbage disposal center will recycle the garbage according to the online location of the garbage bin.

        Odor sensor: odor gas contains hydrogen sulfide, ammonia, volatile organic compounds and other components. A single sensor cannot meet the detection requirements, so sensor array is generally used to collect odor gas concentration.

        Fire monitoring: the system collects the temperature of garbage cans, finds that the temperature exceeds the threshold value, and identifies the fire source system to automatically monitor and report the abnormal information.

        Data transmission equipment: Lora module / terminal is networked through Lora technology TDMA algorithm, with long distance and low power consumption. Prevent packet loss due to data collision. TDMA algorithm can avoid collision in networking, report information accurately, stabilize networking, and realize remote data collection and monitoring between garbage cans.

        Advantages of the scheme:

        1. Lora module is easy to embed and can be redeveloped.

        2. Lora terminal is easy to install. Rs02a1 supports most sensor interfaces.

        3. The gateway supports both TCP / UDP server and UDP client with multi-level backup.

        4. Lora, a high-level AES encryption algorithm, is networked to ensure data security.

        5. Low power consumption, long distance, low delay, no packet loss.

        6. Multiple channels are parallel, the whole street has multiple trash cans, and there are many networking points.

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