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Is it can communication between your (ESL Gateway) and my Server for updating image of ESL tags ?

As a professional electronic shelf labels manufacture, we can realize the function that means we can provide the middleware for you.
The middleware just receives the data that you need to send, and we are responsible for finding the base station to send it. 
Middleware is equivalent to a sender with an API interface (a program that sends data to the base station)
If you want to get more information about our product, you can contact us, or click the link to get more technical documents: https://..........com/comm02/Specification.htm