SparkFun Electronics will be closed in observance of memorial day on Monday, May 29th. We will resume normal business hours on Tuesday, May 30th. Any orders placed after 2pm Mountain Time on Friday, May 26th will process and ship out on Tuesday, May 30th.


Member Since: May 31, 2009

Country: United States

  • Pin connections:
    SDA to pin 4 on the analog header
    SCL to pin 5 on the analog header
    VCC to 5v
    GND to GND
    I/O pins need pull up resistors to VCC.
    Board has A0-A2 with solder pads like (|). connect middle to left (power) for a 1, or right (gnd) for a 0. (see picture shown above)
    setting the pins:
    Wire.send(b); // byte for pins 0-7
    Wire.send(b); // byte for pins 8-15
    Wire.endTransmission(); // stop transmitting
    The board supports id 0-7. Add 32 (0x20) to the id and pass that to beginTransmission. My device id was 0 and I passed 32 to beginTransmission
    you have to send an even # of bytes. first is the lower 8 I/O pins. second is for the higher 8 I/O pins.
    read is similar. here’s quick code
    Wire.requestFrom(32, 2); // 2 bytes from device 0
    char c = Wire.receive();
    Serial.print(c, HEX); // print the character
    Serial.print(“, ”);
    you need to first write 1 to pins you would interested in reading from.

No public wish lists :(