     DEBUG_SERIAL_PRINT_FLASHSTRING("RH%: ");
     DEBUG_SERIAL_PRINT(rh);
     DEBUG_SERIAL_PRINTLN();
-    const int light = AmbLight.read();
-    DEBUG_SERIAL_PRINT_FLASHSTRING("L: ");
-    DEBUG_SERIAL_PRINT(light);
-    DEBUG_SERIAL_PRINTLN();
-    const int tempPot = TempPot.read();
-    DEBUG_SERIAL_PRINT_FLASHSTRING("temp pot: ");
-    DEBUG_SERIAL_PRINT(tempPot);
-    DEBUG_SERIAL_PRINTLN();
-
-    ValveDirect.read();
 
     // Initialised: turn main/heatcall UI LED off.
     OTV0P2BASE::LED_HEATCALL_OFF();


// OBJECTS & VARIABLES
/**
 * Peripherals present on REV7
 * - Pot        Set input to Hi-Z?  +
 * - PHT        IO_POWER_UP LOW
 * - Encoder    IO_POWER_UP LOW
 * - LED        Set pin HIGH?
 * - Button     Set to INPUT
 * - H-Bridge   Control pins HIGH, Current sense set to input.  +
 * - SHT21      read() once.        +
 * - RFM23B     ??                  +
 * - XTAL       Setup and leave running?
 * - UART       Disable
 */

/**

// MAIN LOOP
//========================================
/**
 * @brief   Sleep in low power mode, toggle LEDs every 2s.
 */
void loop()
{
    static bool LED_on;

    // Toggle LED and boiler relay (with its LED) in antiphase.
    if(LED_on) { OTV0P2BASE::LED_HEATCALL_ON(); }
    else { OTV0P2BASE::LED_HEATCALL_OFF(); }
    fastDigitalWrite(OUT_HEATCALL, !LED_on ? HIGH : LOW);

    // Ensure that serial I/O is off while sleeping.
    OTV0P2BASE::powerDownSerial();
    // Power down most stuff (except radio for hub RX).
