KontroLIR Pin Outs

KontroLIR Pin Out Serial Interface

The header pins for the Serial I/F interface are laid out as follows:

1. GND -ve supply power Ground / 0V
2. TXD Connects to TXD on the adapter (Connected to TXD0 on the ATmega328PB)
3. RXD Connects to RXD on the adapter (Connected to RXD0 on the ATmega328PB)
4. VCC +ve supply power 5V (will also work with a 3V3 supply @ 8MHz or 4MHz)
5. RTS Used to reset the MCU during Firmware upload
6. DBG Unpopulated by default. Can be used as a debug pin, if necessary. Also connected to the LED.

Note 1: The image is looking from the keypad up. Looking throught the battery compartment, the order will be mirrored.

Note 2: On my FTDI Serial USB adapter: RTS=>DTR; RXD=>Tx;TXD=>Rx; GND=>GND; VCC=>5V.

Note 3: These pins are accessible via the battery compartment.

KontroLIR Pin Out ICSP

The header pins for the AVR ICSP interface are laid out as follows:

1. GND -ve supply power Ground / 0V
2. MISO Standard ICSP pin for use with avrdude & USBASP, Atmel ICE programmer or equivalent
3. RESET Standard ICSP pin for use with avrdude & USBASP, Atmel ICE programmer or equivalent
4. SCK Standard ICSP pin for use with avrdude & USBASP, Atmel ICE programmer or equivalent
5. MOSI Standard ICSP pin for use with avrdude & USBASP, Atmel ICE programmer or equivalent
6. VCC +ve supply power 5V

Note 1: To access these pins you must first remove the batteries and then 'carefully' open the enclosure.

Misc

There are other headers available for advanced users, as follows:

• 2-pin through hole I2C interface (SDA,SCL)
• 4-pin SMD I2C interface (SDA,SCL,VCC,GND)
• If IR receivers are not installed, then the footprints are available, along with the associated GPIO pins.
• If the I2C EEPROM is not installed, then the SOIC-8 footprint is available, along with the associated GPIO pins.

Spare GPIOs

Advanced users, may further expand KontroLIR, using the following GPIOs, if available.

• The LED pin may be reused for other purposes, if desired. (1 GPIO)
• If the IR receivers are not installed, the 2 signal pins & power supply pin may be reused. (3 GPIOs)
• If the I2C EEPROM is not used then the SDA & SCL pins & power supply pin may be reused. (3 GPIOs)

GPIO Mapping

Detailed GPIO mapping can be examined in the file: KIR_header.h Remote button IDs are pre-calculated from the ROW/COL indices. Every pin used is pre-defined along with a collection of useful pre-compiler macros, intended for easue of use. The contents should be relatively straight forward to follow, for those familiar with the Arduino and IRremote ecosystems.