DIY Gravimetric Espresso with Bluetooth and Android connectivity

Converting my Ascaso Dream PID to brew by weight, or "gravimetric" by using a BLE scale to control an ESP32 based optocoupler switch. These conversions aren't that difficult to implement. The tricky part is the scale. I've also developed an Android app, and the full source code for the Arduino and Android components as well as the switch schematic are on my Github.

Source Code: https://github.com/techdregs/Gravmiet...
BLE Scale Build:    • DIY Data Logging Scale with  Android ...  

Esty link for Leak Sensors: https://www.etsy.com/listing/18355057...
Leak Sensor Vids:
   • My First Product...  
   • DIY Leak Sensor for ESPHome and Home ...  

Ascaso Dream PID Electronics:    • Ascaso Dream PID Electronics (w/full ...  

=== Timestamps ===
00:00 Introduction
00:54 What is "gravimetric"? Why is it good?
03:24 How to control an espresso machine.
09:26 Integrating the BLE Scale
11:05 First Test
11:40 The Android App
13:58 Full Demonstration
17:57 Interlude
18:48 A rant about espressoworld
27:04 Conclusion