I am trying to upload a sketch into my Uno R3. But when I click Upload, the Rx LED flashes 3 times and the TX LED is not flashing. The Uno is still running my previous sketch normally and I tried the loopback test and it works fine.
When the RX led flashes the arduino resets and then the IDE says
Binary sketch size: 7,286 bytes (of a 32,256 byte maximum) avrdude: stk500_recv(): programmer is not responding
I can upload sketches a week or so ago but now it's not working... I'm using Ubuntu 13.04 with Arduino IDE 1.0.5 My Board and Serial Port are set to the right one and my computer can recognize The Arduino....
Can anyone help me to solve this problem?