The Infowedge app lists the barcode profiles defined for the device. The first time Glink connects to a server application, Glink will create a new profile named Glink and use this profile when scanning barcodes. Modify this profile if additional barcode settings are needed.
On some Chainway devices you have to change the key mapping for the Scan keys in Android Settings -> KeySettings. Tap Menu, then New mapping, press the Scan key you want to remap, then tap Click to select then CUSTOM KEYCODE and enter the custom keycode 293 (Gun trigger) and tap YES. The final step is to tap the Check icon in the top right corner of the screen.
On other Chainway devices you can avoid this behavior by opening the Keyboardemulator app and enable the parameter AppSettings -> block scan key.