Strav's blog

I've been working on a device that I can add to a car which will connect to Home Assistant / MQTT and allow me to determine whether a vehicle is at home/away as well as allow me to monitor the charge level of the battery.  Since we have a few cars, some are not driven frequently and if the battery levels drop too low, they won't start and if low enough, the battery can be damaged or even completely ruined.  I decided to try to design the circuit and have it created as an arduino D1 Mini 'hat' using EasyEDA to design the circuit and JLCBCB to create it.  Here is all the relevant information I've gathered for the project:

Optocoupler
NOTE: examine the pinout carefully - it's not arranged the way I would have expected...
Battery Voltage Measurement
4N25 Optocoupler: A Simple Application Circuit [With Example]
Detect car +12V using Arduino
Optocoupler with Arduino

Voltage Divider
Voltage Divider Calculator
How can I use a 12 V input on a digital Arduino pin?

EasyEDA/JLCPCB
JLCPCB
WEMOS D1 MINI SHIELD LAYOUT

Arduino
How To Read The ESP8266 A0 Pin with Arduino
I Made a Car Trip Tracker .... without using GPS
A Car Trip Tracker without a GPS module
Monitor your Car Battery Remotely using ESP8266
DIY: Monitor Your Car Battery: Code & Setup
Vehicle Presence Detection - Home Automation
MQTT Vehicle Presence
MQTT-Vehicle-Presence

Home Assistant
Monitor your car battery in Home Assistant

Current Sensor
INA219 Current Sensor with Arduino

Here is a link to an article explaining how to enable the Admin shares (C$, D$, etc.) on Windows systems.

How to enable $Admin Shares in Windows 7, 8 or 10

I tried setting up an advanced Hackintosh VM with dedicated GPU and largely succeeded but networking was an issue I never quite sorted out.  So, I decided to take a different route - I had some old PC hardware sitting around so I installed MacOS directly on it.  Works fantastic!

Install macOS on any PC | OpenCore Guide
ChrisTitus.com
Install MacOS on any PC | OpenCore Guide 2022 for Windows | Hackintosh | No Mac Required
How to Install MacOS on any Intel PC or Laptop
How to Build a Hackintosh - Step-by-Step Guide (Install MacOS Big Sur on PC)
Dortania's OpenCore Install Guide
OC: Failed to load configuration
Boot from USB - no error messages, but stuck somewhere
OpenCore and macOS 11: Big Sur
How to Install macOS Catalina on VirtualBox on Windows
Download macOS Catalina ISO Image -Latest
Unable to create folder in root of 'Macintosh HD'?
Hackintoshes not getting updates with OpenCore
New OpenCore install - 4x inserted ACPI table has length mismatch errors
Can someone please explain SSDT-EC-USBX like I'm five?
OpenCore Catalina Install Guide
macOS 10.14 Mojave on Unsupported Macs Thread
(Network Issue) Error #6
Warning "failed to decompile DSDT.aml" #18

I had an issue with the CD Drive constantly spinning up an looking for a disk.  Here is a workaround for that issue
CD drive keeps scanning for a disc

I also needed to create a folder in the root directory.  Here are the steps to do that:
Creating root-level directories and symbolic links on macOS Catalina

One of the few things I didn't get with my Tesla was a power frunk/trunk.  Unfortunately, it's not feasible to install OEM units so I chose to go aftermarket to accomplish this.  Here are a number of links I used to help with selecting the units and installation.

Frunk

Trunk
COzero Power Liftgate Example
Aftermarket Power Lift gate for Tesla Model S
CoZero to OEM Switch Pinout
DIY Power Lift gate for Tesla Model S Walkthrough Video
Cozero v2 kit finished install
Tesla Offer - Model S Electric Tailgate Installation Tutorial
HANSSHOW Trunk Liftgate v3 install
Wire to cut to allow remote to close trunk

I ran into TeslaMate after I bought my Tesla.  It is described as "A powerful, self-hosted data logger for your Tesla".  Grafana is operational dashboard software that will display the data in a usable format. Here are a number of links to how I installed them:

Grafana:
Plotly
Grafana - Dashboards
Grafana - Json Files
Grafana - Json Instructions
Panodata Map Panel

TeslaMate:
TeslaMate
TeslaMate Docs
TeslaMate Grafana Dashboards
How to set Cost variable?
TeslaMateAgile
Manually Fixing Data
Tesla Auth

Unraid Docker:
Teslamate Docker
Grafana Configuration Image
Tesla_Dashcam and TeslaMate dockers
Mosquitto Unraid Config
Postgres Unraid Config
TeslaMate Unraid Config
Support for Atribe's Repo Docker Images (How to set up dockerhub containers in Unraid)
Grafana Unraid Docker Configuration