The simplest arduino mega ISP programmer/UART bridge shield. When switch is in upper position - work as programmer, when in low position - as UART bridge. The problem is that when use programmer you also have to disconnect rx/tx pins from shield - help in solving this problem appreciated.

The simplest arduino mega ISP programmer/UART bridge shield. When switch is in upper position - work as programmer, when in low position - as UART bridge. The problem is that when use programmer you also have to disconnect rx/tx pins from shield - help in solving this problem appreciated.