Sunmi T3 POS Secondary Touch Input Leak Issue and Solution Search
Technical solution proposals for touch input leakage in POS devices.
1Root of the Problem
On Sunmi T3 POS devices, touch inputs from the secondary display leak to the main screen, causing unintended interactions in the cashier app. This occurs when customer touches on the ad display affect the cashier interface.
2Existing Solution Attempts
Standard Android solutions like FLAG_NOT_TOUCHABLE and FLAG_NOT_FOCUSABLE have been tried but failed. This hardware-level issue at Sunmi's layer bypasses software-level prevention methods.
3Sunmi T3 Limitations
The device's settings menu is extremely limited and offers no options for touch input management. Additionally, incomplete and Chinese-heavy documentation creates extra challenges for developers.
4Technical Details
The problem stems from the kernel-level input driver processing touch events directly at system level. This renders standard Android window management methods ineffective.
5Potential Solution Paths
Alternative methods like Sunmi DS_SDK specific calls or AccessibilityService usage are being investigated. A system-level solution without root access is needed.
6Industry Importance
As multi-screen usage in POS systems becomes more common, such hardware-software integration issues become critical. Reliable solutions need to be developed for the retail sector.