Update WeBalance aka MePosture with current progress

docs/blog/2024-08-WeBalance/index.rst

@@ -0,0 +1,147 @@
+.. post:: 2024-08-19
+    :tags: Wii, Balance Board, HX711, Load Cell, Raspberry Pi, ESP32, FARM-Stack, React, Redux, MongoDB, FastAPI, MongoDB,  OpenAPI, Kiota 
+    :language: English
+
+
+Mini-Project: WeBalance
+#######################
+
+**Let's tinker a gadget!**
+
+- Time estimate: One afternoon (net)
+- Cost estimate: Far below 50 Euro (Raspberry Pi, Monitor, Keyboard, Mouse not included)
+- Skill level: Intermediate hobby tinkerer
+
+WIP - Work-In-Progress!
+
+
+Background
+**********
+
+Recently I met a physician in the field of orthopaedics, sports medicine and performance diagnostics. I learned from him that a good posture is important for our health and well-being. So let's create some thing!
+
+
+The Gadget
+**********
+
+With a ...
+
+- **home-made Balance Board** (like a Wii Balance Board) with hardware used in digital scales, voltage amplifiers (HX711)
+- a (little) oversized **microcontroller**, Raspberry PI 5 (RPI5), we can directly work on, so a full-blown computer.
+- **WebApp** (Full-Stack with FARM-Stack: FastAPI, React, MongoDB) to visualize the data and to provide a user interface for the user to interact with the gadget. In the DataBase historical health data can be stored and analyzed.
+
+
+BOM - Bill Of Material
+**********************
+
+Production (and Development):
+
+- `1x Raspberry PI 5 (RPI5) <https://www.berrybase.de/raspberry-pi-5-8gb-ram?number=RPI5-8GB&utm_source=google&utm_medium=cpc&gad_source=1&gclid=Cj0KCQjwrKu2BhDkARIsAD7GBov8VedHTQojvFLXx4jcSPB8PM5e2Y9TdrDWQBwLO_QkQxTjDE9FAdEaAlxmEALw_wcB>`__
+- 1x SD-Card 32G
+- 1x Power adapter 5V, enough current for powering RPI5
+- 1x USB-C cable for powering RPI5
+- 1x Breadboard 830 points
+- `T-Cobbler for RPI <https://www.berrybase.de/t-cobbler-fuer-raspberry-pi-inkl.-gpio-kabel?number=BT-Cobbler&utm_source=google&utm_medium=cpc&gad_source=1&gclid=Cj0KCQjwrKu2BhDkARIsAD7GBotR3UGKdKQ3AWmxZ8MnXMjBl_Sm3wK_7dTaAdycOJBxgVBQf0BfKxAaAlAhEALw_wcB>`__
+- Enough Jumper wires male-male
+- Enough Jumper wires male-female
+- 1x `Ebay: Digital Scale Set (4x Load Cell 50kg each, 1x Amplifier HX711) <https://www.ebay.de/itm/234796576410?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20200818143230%26meid%3Db5a09e7cc4f748fc8f013a86210382b7%26pid%3D101224%26rk%3D4%26rkt%3D5%26sd%3D386339206392%26itm%3D234796576410%26pmt%3D1%26noa%3D1%26pg%3D4429486%26algv%3DDefaultOrganicWebV9BertRefreshRankerWithCassiniEmbRecall%26brand%3DMarkenlos&_trksid=p4429486.c101224.m-1>`__
+- 3x `Ebay: Amplifier HX711 <https://www.ebay.de/itm/293840537869?_nkw=HX711&itmmeta=01J5MQ8NQHS3Y0ZFJKER1DWYD7&hash=item446a42c90d:g:PgYAAOSwkH5kLTdk&itmprp=enc%3AAQAJAAAA4HoV3kP08IDx%2BKZ9MfhVJKlUkfHyxwr%2BcpjnFHyV18f%2FXZVUImoDurlDUvWO7FGWzAvbALLgRSUeKFzUiAI1BU23DXZelMUpHoeSfk3Jc6RdHAFSf6rsXMGCfvNVir3ITwbpHFq0f4JaV1lmQOztEQfbx6%2B22gKCoyXXevfquYPC4Z5Invd6KXuPmhFXapL84s9R2ub3JXgjbuU1m9GApfa6P6a8gqTIUPOrSPDnNK%2BaF%2Br3cLpOva0R5QmUomA9cDOUuEDB1rq%2FbqetKhF8VQbN%2B5e5s87Ztk5DtmhsX5Z4%7Ctkp%3ABFBM9tuil61k>`__ 
+- 4x `Thingiverse| Half Bridge Load Sensor mount <https://www.thingiverse.com/thing:4873113>`__
+
+
+Development (in addition):
+
+- 1x `Adapter HDMI-D-plug to HDMI-A-Socket <https://www.berrybase.de/offizielles-raspberry-pi-micro-hdmi-adapterkabel-d-stecker-a-buchse-weiss-235mm?number=RPI4-HDMI6&utm_source=google&utm_medium=cpc&gad_source=1&gclid=Cj0KCQjwrKu2BhDkARIsAD7GBosG7TWPVC6cmPAkKpYrmedKvFhTkG3tQ09WmayeBxPWUaMw9VfZUukaAsViEALw_wcB>`__
+- 1x Monitor
+- 1x Keyboard
+- 1x Mouse
+
+
+SBOM - Software Bill Of Material
+********************************
+
+Production (and Development):
+
+- `Raspberry Pi OS with desktop and recommended software (64-bit) Release date: July 4th 2024, Kernel version 6.6, Debian version: 12 (bookworm) <https://downloads.raspberrypi.com/raspios_full_arm64/images/raspios_full_arm64-2024-07-04/2024-07-04-raspios-bookworm-arm64-full.img.xz?_gl=1*eiaaxh*_ga*MTI2MzMyODY0MC4xNzI0Mzc5MzQy*_ga_22FD70LWDS*MTcyNDY0MzgyNi4xLjAuMTcyNDY0MzgyNi4wLjAuMA..>`__
+- Python 3 12.5
+- hx711-multi 1.4.1 
+
+
+Development (in addition):
+
+- Visual Studio Code 1.92.2
+- pipx 1.1.0
+- Poetry 1.8.3
+
+
+Resources
+*********
+
+- `Arduino Scale with HX711 and 50kg Bathroom Scale Load Cells | Step by Step Guide | Connecting one load cell <https://youtu.be/LIuf2egMioA?si=IAhVZdv8fffR8lHE&t=46>`__
+- `HX711 class to sample a 24-bit ADC (or multiple) with Python 3 on a Rasperry Pi Zero, 3 or 4 <https://pypi.org/project/hx711-multi/>`__
+- `PipX statt Pip <https://gnulinux.ch/pipx-statt-pip>`__
+
+
+Sketches
+********
+
+Here some sketches:
+
+.. figure:: _figures/sketch_1.png
+
+    Parts of the content is obsolete since RPI5 has been chosen and 4 HX711 are needed.
+
+.. figure:: _figures/sketch_2.png
+
+    Parts of the content is obsolete since RPI5 has been chosen and 4 HX711 are needed.
+
+
+Expert Dialogs
+**************
+
+Here some GPT-4o chats:
+
+.. toctree::
+    :maxdepth: 1
+    :caption: Related GPT-4o chats
+
+    _attachments/ChatGPT-ESP32_HX711_Bluetooth_Project.rst
+    _attachments/ChatGPT-ESP32_Load_Cell_Integration.rst
+    _attachments/ChatGPT-HX711_Circuit_Function.rst
+    _attachments/ChatGPT-Using_Wii_BalanceBoard_Raspberry_Pi.rst
+
+
+Insights in Work-In-Progress
+****************************
+
+.. figure:: _figures/balance_board.jpg
+
+    Balance board with top side made of glass waiting to get connected to the four HX711
+
+.. figure:: _figures/rpi_and_circuit.jpg
+
+    RPI connected to 4 HX711, Power, Monitor, Keyboard and Mouse with 1k Resistors waiting to get connected
+
+Software (Repository: https://github.com/basejumpa/WeBalance ) already acquires data. Here the continuous output ::
+
+    --snip--
+
+    read duration: 0.969 seconds, rate: 10.3 Hz
+    raw ['1990.750', '-28956.286', '-1740.286', '-17075.444']
+    wt ['1990.750', '-28956.286', '-1740.286', '-17075.444']
+
+    read duration: 0.968 seconds, rate: 10.3 Hz
+    raw ['1995.625', '-28946.571', '-1719.857', '-17096.286']
+    wt ['1995.625', '-28946.571', '-1719.857', '-17096.286']
+
+    read duration: 0.978 seconds, rate: 10.2 Hz
+    raw ['1998.714', '-28930.429', '-1654.143', '-17004.875']
+    wt ['1998.714', '-28930.429', '-1654.143', '-17004.875']
+
+    --snap--
+
+**Next step:** connect each load cell to its own HX711 as shown here:
+
+.. figure:: _figures/circuit_hx711_one_load_cell.jpg
+
+    Circuit one cell connected to one hx711. Origin: `Arduino Scale with HX711 and 50kg Bathroom Scale Load Cells | Step by Step Guide | Connecting one load cell <https://youtu.be/LIuf2egMioA?si=IAhVZdv8fffR8lHE&t=46>`__