mcu.getPin("PA0").connect(yellow);
mcu.getPin("PA1").connect(green);
mcu.getPin("PA2").connect(red);
// radio
radio = new CC1000Radio(mcu, MAIN_HZ * 2);
addDevice("radio", radio);
// sensor board
sensorboard = new SensorBoard(sim);
// external flash
externalFlash = new ExternalFlash(mcu);