def _show_wiring(self):
wiring = "RST\t-> RTS\n" \
"GPIO0\t-> DTR\n" \
"TXD\t-> RXD\n" \
"RXD\t-> TXD\n" \
"VCC\t-> 3V3\n" \
"GND\t-> GND"
QMessageBox.information(self, "Wiring", wiring)