Seeking developer to complete project:
Current QR Code Scan feature availabile in Salesforce Mobile app within the Campaign Object (Quck Action Button). QR scan feature only connects with primary device camera. QR code contains unique ID for Salesforce Contact record. When scanned the contact is added to the Campaign object as a Campaign Member. Entry includes date and time of check in. Duplicate scans are blocked with a warning prompt and non eligible QR code scans prompt an error message.
Requesting extension of feature to include external scanners for QR code check-in scanning (external scanner SDK available). Supported use cases include wireless (roaming - bluetooth) and connected (fixed - USB) scanners.