Urgent React Native POS Issues Fixing

I'm looking for an experienced React Native developer to urgently resolve two critical issues in my POS application:

Issues to Fix:

Second LED Screen Integration:

The second customer-facing LED screen on my POS (Model 1905AK) isn't displaying the transaction totals properly.

Cash Drawer Integration:

The Proline Cash Drawer (Model CR-2022-M), connected through an XPrinter XP-N200L, isn't opening automatically as intended.

Tech Stack & Equipment:

React Native (POS app is built using React Native)

Proline Cash Drawer "CR-2022-M"

XPrinter XP-N200L

POS Terminal Model 1905AK

Requirements:

Proven experience integrating peripheral hardware with React Native apps.

Familiarity with serial ports, USB, and Bluetooth connections in React Native.

Ability to quickly troubleshoot and resolve hardware-software integration issues.

Deliverables:

Fully functional second LED screen displaying transaction totals correctly.

Properly functioning cash drawer opening on transactions.

Please respond with examples of previous similar integrations and your estimated timeframe for resolving these issues.