Since we had 650 of these boards to test and assemble we designed our default firmware to be our testing firmware. Most common problems during production were a bad, or non-connection to the USB-UART or a LED that moved a little during assembly and therefor was shifted or tombstoned. The script that was designed by Christophe did the trick. It will scan for new USB ports and will automatically start programming the badges. I say badges since it worked perfectly with multiple PCBs attached to the PCB.