Solution (hardware-software complex) for weight-stack gym machines

We are a manufacturer of professional sport and fitness equipment from Ukraine. At the moment we are contemplating hi-tech upgrade of our weight-stack machines by incorporating (or in another words - "by adding") “smart”/digital elements. (Weight Stack Machines - are the machines that have the weights already in a stack on the machines frame. The weight selected can be changed easily by pulling the pin available and choosing the resistance to be heavier or lighter). To be specific: We want to supplement our weight-stack machines with so called [smart module], which (primitively speaking) consist of [hardware, software and monitor] and allows for users, exercising on the machines, to track/watch their activity through displayed parameters (such as number of exercise repetitions, spent calories, time lapses, etc...). So, we are in search of developer or supplier who can offer their solution of above mentioned [hardware + software + monitor] for our selectorized/weight-stack equipment. Thank you ! Please see in the picture an example of [weight-stack machine with incorporated monitor/computer] - smth we are looking for.