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Which mcu could best suit wifi project
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Which mcu could best suit wifi project

by knowthebird on Sun Mar 03, 2019 8:24 pm

Good afternoon,

I am going to be working on a project using the Adafruit 9-DOF IMU and ADXL377 - High-G Triple-Axis Accelerometer. Links below are for the products I am referring to. I have a few other requirements. I need to be able to log the information to an SD Card, and send the information over W-Fi. I would also like to keep the device small in size.

https://www.adafruit.com/product/2472
https://www.adafruit.com/product/1413

Lastly, and ideally, I would like a WiFi AP to run on the device, so that any phone or computer could connect to it, and see the data in real time similar to the bunny example below:

https://learn.adafruit.com/adafruit-bno055-absolute-orientation-sensor/processing-test

Originally I was thinking of using a raspberry pi zero w, but I believe I will also need to purchase an analog to digital converter, and then saw the following warning in documentation:

Raspberry Pi computers do not have I2C clock stretching support so they don't work well with the BNO055 - there's hacky workarounds, but it's not recommended!


So now I am not sure what device to use, and I see a lot of options to filter through. I do not mind coding with Arduino IDE or Python. I am considering using the feather m0 wifi and sd card feather wing below, but I am open.

https://www.adafruit.com/product/3010
https://www.adafruit.com/product/2922

Any and all advice on choosing the best hardware is appreciated. My budget can wiggle, and so can the setup. I just want to choose what would work best for these requirements.

Thank you for any and all help.

knowthebird
 
Posts: 10
Joined: Sat Oct 28, 2017 1:58 am

Re: Which mcu could best suit wifi project

by adafruit_support_mike on Mon Mar 04, 2019 12:38 am

The other option for a microcontroller would be the ESP8266, which has built-in Wifi:

https://www.adafruit.com/product/2821

It only has one 0V-1V ADC, but costs about half as much as the Feather M0 + WINC1500. You could add a Seesaw GPIO expander with three 12-bit ADC pins for less than the difference:

https://www.adafruit.com/product/3657

Either Feather can operate as a WAP, and both will work with the Adalogger FeatherWing.

adafruit_support_mike
 
Posts: 59487
Joined: Thu Feb 11, 2010 2:51 pm

Re: Which mcu could best suit wifi project

by knowthebird on Mon Mar 04, 2019 2:33 am

Thank you for the feedback!

knowthebird
 
Posts: 10
Joined: Sat Oct 28, 2017 1:58 am

Please be positive and constructive with your questions and comments.