Android Usb Serial Monitor Lite Source Code

Tripp Lite's USB to Serial Adapter enables a serial device to be connected to a computer through the USB port. It is excellent for a PDA, digital camera, modem or ISDN terminal with a serial port. The adapter upgrades a traditional RS-232 serial port (DB9 male) to USB (a male).

I have a problem. I'm currently programming an android app which sends specific CAN-messages into my infotainment-network of my car. Writing CAN-messages from the Arduino into the infotainment-network already works without any problem. But the communication between my Nexus 7 2013 tablet with Android 5.0.2 is driving me crazy. I've made a simple test: If I send 'ToCAN_UP' via serial from the tablet to the Arduino a LED should light up at the Arduino which basically works already. BUT: It is extremly slow! Sending 'ToCAN_UP' takes 2-3 seconds.

I've tested it with the usb-serial-for-android library and the Physicaloid Library. Both have the same problem BUT: I've tested some apps for serial communication like 'Android USB Serial Monitor Lite' (which uses the Physicaloid Library) it's wonderful fast as it should be with the same 'ToCAN_UP' I'm sending with my own app. My current source code is quiet simple and I can't figure out why it is so slow. The app is not even hanging while the Arduino is receiving the data and the port.write method itself is done immediately (so it sends at background). Does anybody have an idea? Here's the java code.

I have a problem. I'm currently programming an android app which sends specific CAN-messages into my infotainment-network of my car. Writing CAN-messages from the Arduino into the infotainment-network already works without any problem. But the communication between my Nexus 7 2013 tablet with Android 5.0.2 is driving me crazy. I've made a simple test: If I send 'ToCAN_UP' via serial from the tablet to the Arduino a LED should light up at the Arduino which basically works already.

BUT: It is extremly slow! Sending 'ToCAN_UP' takes 2-3 seconds. I've tested it with the usb-serial-for-android library and the Physicaloid Library. Both have the same problem BUT: I've tested some apps for serial communication like 'Android USB Serial Monitor Lite' (which uses the Physicaloid Library) it's wonderful fast as it should be with the same 'ToCAN_UP' I'm sending with my own app. My current source code is quiet simple and I can't figure out why it is so slow.

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The app is not even hanging while the Arduino is receiving the data and the port.write method itself is done immediately (so it sends at background). Does anybody have an idea? Here's the java code.

I’m having an issue implementing this on a device that has a hub that has a thermal printer, card reader, and scanner attached to it. I only want to access the scanner, but when I run your demo application it says USB Connected followed by Device not Supported. This happens three times and the app crashes each time when I try to scan. The third time I run the application it works. I’m assuming it is trying to connect to every device on the hub, is there a way I can make it only connect to the scanner and ignore other devices?