Create demo Android app to fetch data from ODB adapter

ELM adapter data collection app

this is a home hobby project, open source, I am using a Raspberry pi server, the project is quick and dirty
we will work live together online
it is a code sprint
I will test and prove the app myself, you may do the same if you can
The API is on Github and is public.
https://github.com/pires/obd-java-api
The endpoint is controlled by me
the code will be pushed to GitHub as we go
step 1 should take about 2 hours
step 2 should take maybe 4 hours

the UI is https://jsfiddle.net/rusty1642/hc34zx0r/5/

there will be a persistent state variable to record the app state

step 1
register with a server endpoint on button click, user enters username (u)and password (p)
registration url = https://brainbox/cgi/register.php
takes 2 param u=username p=password either GET or POST
returns JSON
{
"publicDomain":"newton.house",
"serverID":"fe138db692ff4bceb5aee6f62c9cfcd7",
"rsyncID":"Pu0eeRhR",
"timeRemaining":0,
"signedIn": 0,
"insideLAN":1,
"clientIP":"192.168.0.3",
"errors":"none"
}
save public domain name and rsyncID (auth token) to persistent storage

on success
show new UI panel to select bluetooth connection
set a new state flag

user will select ELM bluetooth connection on button click
on success
show new UI panel with status, see UI mock up
save bluetooth uuid or guid to persistent storage
set up Broadcast listener to monitor presence of the selected bluetooth device

step 2
app is running after registration and bluetooth selection, and listening for ELM bluetooth
on finding device
connect, ping every 5 seconds for engine on

on finding engine on
stop fast ping
start timer or use Thread.sleep(), collect sample data using Pires API.
save journey start data (milage, GPS position, app data, car data, time)
The sample data will be 5 data points at each poll of the adapter.
each datapoint is called with a class and .run() method.

on engine stop
collect end data (milage, GPS,time), parse into JSON string, send to server endpoint when a connection is available
make a POST request to
https://newton.house/cgi/glovebox/ep.php
with JSON data structure in the body
{
command: set-car-data,
rsyncid: xxxxxxx, // saved auth token
start:[ gps: nnn.nnn nnn.nnn, milage: nnnnnn, cartype:x ],
ending: [ gps: nnn.nnn nnn.nnn, milage: nnnnnn ],
data: [ {int,int,int,int,int},{int,int,int,int,int},{int,int,int,int,int} ... ]
}
rtns errors:none

there is a reset button
on click reset button
clear all persistent data,
reset state variable,
and show starting UI