nRF52 SPI and Wire problems
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- nikinel
- Posts: 8
- Joined: Fri Apr 27, 2018 4:18 am
Re: nRF52 SPI and Wire problems
jubueche no problem, I discovered how to open a new thread. Thanks for the notice.
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: nRF52 SPI and Wire problems
You need pullups on SDA and SCL between the TCA and the BNO055's 4.7k ought to work.
- nikinel
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- Joined: Fri Apr 27, 2018 4:18 am
Re: nRF52 SPI and Wire problems
Thank you very much for clarifying adafruit_support_rick.
- adafruit_support_rick
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Re: nRF52 SPI and Wire problems
Does that work?
- nikinel
- Posts: 8
- Joined: Fri Apr 27, 2018 4:18 am
Re: nRF52 SPI and Wire problems
I actually started receiving values from the sensor before needing to add the pullup resistor. I think the micro usb port wasn't secure, I'm not certain why, but its working without the resistors. If for some reason it stops reading the sensors, I'll try adding in the resistors. Thanks for your help.
- nikinel
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- Joined: Fri Apr 27, 2018 4:18 am
Re: nRF52 SPI and Wire problems
@adafruit_support_rick,
Oddly my setup was working but now its inconsistently responding. I'm looking to add the pull up resistors you had mentioned for a consistent response. If I have 5 sensors, will I need 10 pull up resistors between the BNOs and the TCA's SDA/SCL connections? Thank you for your help.
Oddly my setup was working but now its inconsistently responding. I'm looking to add the pull up resistors you had mentioned for a consistent response. If I have 5 sensors, will I need 10 pull up resistors between the BNOs and the TCA's SDA/SCL connections? Thank you for your help.
- adafruit_support_rick
- Posts: 35092
- Joined: Tue Mar 15, 2011 11:42 am
Re: nRF52 SPI and Wire problems
Yes.nikinel wrote:If I have 5 sensors, will I need 10 pull up resistors between the BNOs and the TCA's SDA/SCL connections?
- ktownsend
- Posts: 1447
- Joined: Thu Nov 05, 2009 2:18 am
Re: nRF52 SPI and Wire problems
The BNO055 has extremely tight timing requirements on the I2C lines, which may be the problem here as well. See this FAQ for example: https://learn.adafruit.com/adafruit-bno ... faqs#faq-4
- nikinel
- Posts: 8
- Joined: Fri Apr 27, 2018 4:18 am
Re: nRF52 SPI and Wire problems
adafruit_support_rick & ktownsend, Thanks a lot for your help. Yes, ktownsend, the link you sent sounds like the issue I'm having. I'll look into the pull up resistors to have a more consistent connection. Thanks!
Please be positive and constructive with your questions and comments.