The micro USB port on our particle electron board has been damaged and is unfixable (unless I attempt to replace the micro USB and solder a new one down). Our internet connection is spotty where the board is resting so flashing from the command line over the cloud is not working. Can you flash the board again with the Rx and Tx pins using a serial to UART converter? Also, we have access to another board but are under the impression that a set board is tied to the demo app given to us. Is there a way to change the board without changing anything in the app?