1)  The TS4231 is a 3.3V device and must only be used with a 3.3V Arduino board.  Failure to do so will damage the TS4231.

2)  DO NOT add pull-up or pull-down resistors to the D and E signals.  This includes the external hardware and the Arduino INPUT port configuration.  When configured as INPUTs, the Arduino D and E signal connections must not implement a pull-up or pull-down.  The use of a pull-up or pull-down function will cause the TS4231 to operate incorrectly.  The TS4231 has an internal "bus-keeper" function that maintains the correct states on the pins.

The TS4231 Arduino library is architecture independent so it should work on any Arduino hardware.  However, the example application in the library uses the serial port and serial monitor in Arduino's IDE.  Your specific hardware may have unique requirements for using the serial port so be sure to refer to your hardware's documentation if necessary.

During the course of library development, the Adafruit Feather M0 and MattairTech MT-D11 boards were used, so Arduino boards based on the SAMD21 and SAMD11 micros should work fine.

1) First, install the TS4231 Arduino library by following the instructions here:

2) After the library is installed, modify the example application for your Adruino board.

Open the TS4231 example application in the Arduino IDE by selecting File > Examples > TS4231-master > ts4231_config_example.

Determine which 2 pins you will use on your Arduino board to connect to the TS4231 E and D signal pins.  The pins you choose must be bidirectional (supporting INPUT and OUTPUT pin modes).

Modify the following lines of code in the example application by replacing your_E_pin and your_D_pin with the pin numbers you have chosen:

#define sensor1_E_pin  your_E_pin   //User must replace your_E_pin with their pin number (compile error will occur if no number defined)

#define sensor1_D_pin  your_D_pin   //User must replace your_D_pin with their pin number (compile error will occur if no number defined)

** Note:  Your particular Arduino board may require that you make additional code modifications to the example application, so be sure to familiarize yourself with your hardware and its requirements.  For example, serial port usage.

3) After the example application has been modified to add your pin numbers, set up your hardware.  You will need the following:

  • Your Arduino board (remember, it MUST be a 3.3V board)
  • TS4231 board with documentation for pin assignments
  • Lighthouse base station
  • 3.3V power supply or 3.3V output on your Arduino board

With all power turned off, hook up the TS4231 board's power and ground pins to a 3.3V power supply (refer to your TS4231 documentation for pin assignments).  It is highly recommended that you use a 3.3V power supply output and GND pin on your Arduino board.  It will make things much easier.  Then, connect the Arduino E and D pins that you assigned in step 2 to the TS4231 board's E and D pins.  That is it, just 4 connections.

** Note:  If you are NOT using 3.3V / GND pins from your Arduino board, you will need to connect a GND jumper wire between the GND of your 3.3V power supply and a GND connection on the Arduino board to keep your system at the same ground reference.

Position the component side of the TS4231 board within line-of-sight of your lighthouse base station.  The IR detector on the TS4231 board must not be occluded and must be able to "see" the base station laser sweeps.  Distance between the TS4231 board and base station can be up to 5 meters.

Your hardware is now set up, it is time to run the example application.

4) Upload and run the application

The TS4231 has a volatile configuration so it must be configured after each power-up cycle.  Additionally, the device must detect light from a base station after power up and before configuration.  After light has been detected (using the library's waitForLight() function) it is not necessary to detect light again if a re-configuration becomes necessary.

Power up your lighthouse base station and wait for it to indicate that it is operating.  Since the TS4231 needs to detect light from the base station before it can be configured, it is important that the base station is operational before launching the example application.

If you are NOT using your Arduino board to power the TS4231 board, turn on your 3.3V power supply now.  Then, power up your Arduino board and click the Upload button in the Arduino IDE to upload the example application.

The setup() function in the example application halts execution until the serial port is connected, so even though you have uploaded the application, it is not communicating with the TS4231 until you open the serial monitor.

In the Arduino IDE, open the serial monitor under Tools > Serial Monitor.  As soon as the serial port connects, the setup() function will resume execution and you will see output on the serial monitor indicating that the TS4231 has been successfully configured!

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