Overview:


-Animated Boot Screen:  "from chaos to clarity"


Displaying a more realistic prism dispersing light into its components. 


-Main menu:

*The LIDAR-sensor VL53L5cx is build in µ-Spec finally, and its working !! *

Working measurements:

Thermo Cam

- Displaying Raw Data from 32x24 pixel Thermocam (MLX90640) with colorbar and dynamic min./max. temperatures at 1.9 fps (obsolete, due same refresh rate as 80 x 60 interpolated graphic)

- Displaying interpolated Data from 32x24 pixel Thermocam (MLX90640) to resolution: 80x60 pixels with colorbar and dynamic min./max. temperature at 1.9 fps (fps breaks down above 80x60 pixels)

- Displaying Raw Data (MLX90640) 32x24 pixel plotting Min. & Max. Temperature graph

LIDAR 8x8

Raw data image of a sphere: (8.4 fps 8x8, 5.6 fps with 32x32)

Spectral Sensor

- Displaying Raw Data input from 1 + 18 spectroscopic channels (340 & 410 - 904 nm) from AS7265x and ML8511 sensors at 11.5 fps.

+ summed up light intensities in µW/cm²
+ summed up light intensities in "normalized" W/m² 
+ Integration Time of exposure Time (adjusting dynamically)
+ lux in lumen/m² at the moment only from the 560 nm Channel (..its not that easy to convert and needs more lines in code for a nice value) thanks to hackaday.io/azvadva 

- Displaying Transmission Coefficient of translucent objects in percent after taking a reference measurement from static background / ambient light at 11.5 fps

Reference (100 % from ambient light):

Red filter:

Green filter:

- Displaying Reflection Coefficient of objects in percent after taking a reference measurement at 11 fps. (hard coded reference of white paper or make a new own Ref.)

(normal) Light sensor
- Displaying LIGHT signal in time domain at 7.8 fps (old code) => 12.3 fps (tuned code)

Plotting:
+ 480 samples of light intensities in a 30 ms time frame
+ FFT 0-8,5 k Hz Amplitudes
+ color coded Waterfall diagram
+ Light-level in percent over long term time
+ Frequency with maximum amplitude

MEMS Mic 

- Displaying calibrated Audio signal in time domain at 7.8 fps (old code)  => 11.3 fps => 12.1 fps (tuned code) 
Plotting:
+ 480 samples of audio in a 30 ms time frame
+ FFT 0-8,5 k Hz Amplitudes
+ color coded Waterfall diagram
+ Audio-level in dB_spl (Soundpresurelevel) over long term time with 92 dBmax (dampening the signal would give way bigger dB spl-levels)
+ Frequency with maximum amplitude

- Displaying calibrated Audio signal in time domain at 11.7 fps (old code)  => 16.6 fps => 19.6 fps (tuned code) 
Plotting:

+ Audio-level in dB_spl (Soundpresurelevel) over even longer term time

Screensaver:
morphing Julia-Set (random initial settings with 242 200 000 million variations ! )

Future hidden Easter Egg:
working 8x zoom able Mandelbrot/Julia-Set (random color palette and Mandelbrot or Julia-Set)

Code for Mandelbrot here: https://www.instructables.com/Mandelbrot-and-Julia-Sets-on-ESP32/

Future plans:

- combining different sensor data for more information about some sample

- mixing a physical reference white for reflection coefficient 
- using a SD Card to save measurements in CSV format
- WiFi + html with graphs and .txt-file output (is it possible?)

i found those projects stream measurements to a client via html:

for the spectrometer:

https://hackaday.io/project/174401-spectral-esp
for the thermo cam:

https://hackaday.io/project/169447-esp-thermal-camera-streamer

I'll investigate that in the future. Maybe there is a way to run that on the 2. core of the ESP32, so the performance/fps doesn't drop to much.

... and much more. But it feels 76% done.

Hardware:

+ ESP32 TouchDown by Dustin Watts 
    -480 x 320 pixel Touch Display

    https://www.tindie.com/products/dustinwattsnl/esp32-touchdown/
+ 18 + 1 Chanel Spectrometer (AS7265x by Kris Winer + ML8511)

    https://www.tindie.com/products/onehorse/compact-as7265x-spectrometer/
    Beam Path for AS7265x is fitted with extra black adhesive thin foam for less reflective interference: 

    https://www.mjkzz.de/collections/black-color/products/fineshut-sp-0-4-ultrablack-sheet

+ Thermal Imaging (MLX90640)

       https://shop.pimoroni.com/products/mlx90640-thermal-camera-breakout
+ Audio sampling with MEMS Microphone (ADMP401)

     https://www.ebay.de/itm/232741578361?hash=item36307aa679:g:6a4AAOSwEg1a2st4
+ LDR 
+ (!) Ranging Cam with 8x8 pixel by Kris Winer

      https://www.tindie.com/products/onehorse/vl53l5cx-ranging-camera/
+ LiPo 1200 mAh

      https://www.ebay.de/itm/282581166241?chn=ps&mkevt=1&mkcid=28

Project based on previous compact Spectrometer:

Mk I Spectrometer:
https://hackaday.io/project/164636-compact-18-channel-spectrometer

Helpful referenced LEDS:

Reference LEDs for Spectrometer:
https://hackaday.io/project/170340-reference-leds