Update 2 - Week 8 Monday

Because we received our parts, we were able to make major progress on our project during week 7. However, we have not yet received our PCB, so we were unable to test all of the components together (due to power budget issues).

Testing breakouts

The first step was testing all of the breakout boards. To achieve this, we breadboarded the circuit referencing the google sheet that we created in the last milestone. Using the example code by Adafruit, we were able to confirm most of the breakouts were working after soldering header pins to them and breadboarding the circuit, but we ran into some challenges detailed below.

Programming

In addition to testing individual components, we also started programming to enable multiple sensors to work together using I2S, I2C, and SPI. Although we couldn't test every component together, we were able to read data from multiple I2S sensors (BME680, SCD-40). Additionally, we tested the display with test data.

Challenges

Setting up I2S for the MEMS microphone was a bit tricky, but by following the Adafruit example code and using the oscilloscope to make sure the clock signals were correct, we were able to successfully measure loudness to some extent.

When trying to test the SCD-40 with other sensors on the breadboard, it was not being detected, which was concerning. However, once we got our PCB (in later week), all the sensors worked together as expected. We think this may have been possibly due to power budget issues on the breadboard that our PCB was designed to solve.