Please see all COVID-19 updates here as some shipments may be delayed due to CDC safety and staffing guidelines. If you have an order or shipping question please refer to our Customer Support page. For technical questions please check out our Forums. Thank you for your continued support.

Member #403721

Member Since: January 30, 2013

Country: United States

  • I am using the PCF8575 breakoutboard to connect 4 mpr121 boards. Without the PCF8575, the mpr121 code worked perfect. (http://code.bildr.org/download/1010.zip) However, I am having trouble to alter my arduino code to read the data when connected to the PCF8575. I guess the problem lies in the part of the code where the pins are adressed. In the original code I used Wire.requestFrom(0x5A,2); However with the PCF8575 board I need to alter the addressing within the code. I had a look at the sample AVR code, but this is rather complicated. Can anyone help me with the adressing of the pins?

  • I have multiple MPR121 boards which I want to connect to a PCF8575 I2C Expander, then to an arduino. However, I don't know how to connect them. Can anyone help?

  • Have you already tried this? I want to connect multiple mpr121 boards to the PCF8575 I2C Expander, but have no idea how to connect these. Anyone?

No public wish lists :(