I have the API documentation of ESL to integrate with ESLs (Electronic Shelf Labels). There is an IOS app to control this tags and I have this APP's Objective C codes. If you trust yourself to handle this project then contact me anytime. I will give you details.
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Hello I am a senior developer so i can do it very easily if you want. Contact me right now i am ready to start this project for you. Low cost and high quality result reply to discuss more about this project