ESP32-MSGEQ7-FASTLED

Code for using the MSGEQ7 ic with ESP32 and displaying it on a LED Strip using FastLED, not to be confused with the default standard stuff you find online where people create VU meters and stuff

PARTS USED

1. DOIT ESP32 DEVKIT V1
2. Sparkfun Spectrum Analyzer board (i have 1 MSGEQ7 IC at hand but not all the caps and resistors so im using this for now)
3. WS2812B LED Strip (Current length is 44 Led's, waiting for new longer strips to arrive)

MSGEQ7 STATUS

05.13.2021 - i got it up and running with some terrible noise levels on all 7 bands ranging from 100 up to 300! so i did 2 things to sort this.

1. The first step to remove this noise is to set some sort of “floor” level. The idea here is that we assume that anything below a certain level (our “floor”) is assumed to be noise, in which case we will reset that value to 0.

2. We sample each band 5 times and average them out.

so i got it down to 0 with some minor 1's or 2's (just be increasing the floor it can be removed but by doing that we also lose some response time)

FASTLED STATUS

05.14.2021 - Added some FastLED support to show a 7 pixel "graph" of the output from the MSGEQ7 where each pixel represents a frequency.

BAND FREQUENCY

• Band 0 - 63Hz
• Band 1 - 160Hz
• Band 2 - 400Hz
• Band 3 - 1kHz
• Band 4 - 2.5kHz
• Band 5 - 6.25kHz
• Band 6 - 16kHZ