Thingy 91 and Thingy 52

[kSEE]

Hi,

I am having some trouble. For a project, I need GPS, 9 axis IMU (accelerometer, gyroscope, and magnetometer), a microphone, and LTE connectivity in a small form factor. The Thingy:91 does not have a microphone or a gyroscope and magnetometer. However, Thingy:52 does not have GPS and LTE connectivity. Is there another board that can do all of this? Is there a way to connect a 9 axis IMU and microphone to the THingy:91 or attach GPS and LTE connectivity to the Thingy:52? What breakout boards should I use in order to do that? Can I run them in master/slave configuration? I am new at development.

Thank you for your help.

[Carl Richard]

Hi!

For your application I would suggest adding your desired sensors to the Thingy:91. The nRF9160 supports serial interfaces like SPI and I2C, enabling slave/master configuration. However, note that most of the GPIO already is used as discussed in this thread.

For initial development I recommend that you use the nRF9160 DK, which is much more versatile in terms of available GPIO. In addition the DK houses an on board debugger making application testing easier. 

Best regards,
Carl Richard

[kSEE]

I'm not sure I fully understand. Do you think that I will be able to use the following sensors with the limited GPIO on the Thingy 91? Other than power and ground, in total I will need 5 connectors:

1) SCL(I2C)

2) SDA (I2C)

3) Bit clock

4) Data out

5) Left-right clock

1 and 2 are for the IMU

3-5 are for the microphone

The sensors I am getting this information from the links that are shown below.

https://www.adafruit.com/product/2716

https://www.adafruit.com/product/3463

Thank you for your help.

[Carl Richard]

Hi again!

The Thingy:91 already uses the I2C bus for it's other sensors, so I believe that you can hook up the IMU to the already existing SDA and SCL pins. These are available at test points TP9 and TP10, as described in the interface documentation.

This should leave you with enough GPIO for the microphone, though you may have to use the button GPIO and some of the other test points.

Best regards,
Carl Richard