MPOS custom payment shows amount filled while the payment is still ongoing

[Aeid-github]

I have a requirement to develop a custom payment for MPOS, the payment device is called PayPod and it can be used to receive cash amounts in coins or notes and it has more capabilities.
The customer would like to see the amounts being filled in the payment device while the transaction is still ongoing, the device already has such information but my question is related to MPOS, usually once you click on a payment method a request is sent and the screen freezes until it gets the response back. however we need the screen to show updated information from the device while the transaction is still ongoing until the transaction ends by filling the full required amount.
This will give the user an idea about the amount being filled and the remaining amount for the machine to fulfill the transaction.
Is this doable? anyone had such requirements before?
Note: Using commerce SDK