Retail: What is the most efficient method to handle a city of vending machines?

Retail: What is the most efficient method to handle a city of vending machines?
The vending machines are in every corner of the city, If you want to monitor every machines data and make the delivery on time, you need a IoT system to handle it. The USR devices will updata real-time data to the data center. Managers are easy to schedule the trucks with this system.
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