jgrocha/ActivengLab - Githubissues

ActivengLab

Measuring temperatures using high precision RTD.

Glossary

ActivengLab App: Mobile application

Controller: Arduino connected to sensors or relay

Sensor: PT 100, etc

Relay:

Android development

Icon

New → Image Asset → Asset Type: Launcher Icons

    protected void onCreate(Bundle savedInstanceState) {
        (...)
        // show the app icon
        getSupportActionBar().setDisplayShowHomeEnabled(true);
        getSupportActionBar().setIcon(R.mipmap.ic_launcher);
        (...)

Testing

Testing for Android can be classified into:

Local unit tests - tests which can run on the JVM
Instrumented unit tests - tests which require the Android system

Local Unit tests

ActivengLab/app/src/test/java/activeng/pt/activenglab/ExampleUnitTest.java

To run these tests:

Build → Select Build Variant... Test Artifact: Unit Tests

Instrumented unit tests (tests on Android)

ActivengLab/app/src/androidTest/java/activeng/pt/activenglab/ApplicationTest.java

To run these tests:

Build → Select Build Variant... Test Artifact: Unit Tests

Class to load all tests:

ActivengLab/app/src/androidTest/java/activeng/pt/activenglab/FullTestSuite.java

Testing Activities: See sample ActivityInstrumentation. Nice example.

Preferences (Done!)

Android app preferences

android:key="location_text"
android:key="temperature_unit"
android:key="sync_frequency"
android:key="remote_url"

Check preferences on emulator:

Android Device Monitor → File Explorer → data/data/activeng.pt.activenglab/shared_prefs/activeng.pt.activenglab_preferences.xml

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<map>
    <string name="sync_frequency">60</string>
    <string name="temperature_unit">C</string>
    <string name="remote_url">http://lab.activeng.pt</string>
    <string name="location_text">Carnaxide, Portugal</string>
</map>

Data: Contract + DbHelper + Provider

New package (src/mail/java/activeng.pt.activenglab): activeng.pt.activenglab.data

TemperatureProvider.java
TemperatureDbHelper.java
TemperatureContract.java

New package (src/androidTest/java/activeng.pt.activenglab): activeng.pt.activenglab.data

PollingCheck.java
TestDb.java
TestProvider.java
TestTemperatureContract.java
TestUtilities.java

Inspect Sqlite

Emulator:

Android Device Monitor → File Explorer → data/data/activeng.pt.activenglab/databases/temperature.db

Real device (working):

From device to local:

#!/bin/bash

# cd ~/Android/Sdk/platform-tools
# ~/Android/Sdk/platform-tools/adb devices
# List of devices attached
# KBLJZTKVAICMEQ6H      device
# ./adb -d shell "run-as activeng.pt.activenglab ls /data/data/activeng.pt.activenglab/databases/"
# temperature.db
# temperature.db-journal
# Copy the database file from your application folder to your sd card.
~/Android/Sdk/platform-tools/adb -d shell "run-as activeng.pt.activenglab cat /data/data/activeng.pt.activenglab/databases/temperature.db > /sdcard/temperature.db"
~/Android/Sdk/platform-tools/adb pull /sdcard/temperature.db
sqlitebrowser temperature.db

Local to device:

#!/bin/bash

~/Android/Sdk/platform-tools/adb push temperature.db /sdcard/
~/Android/Sdk/platform-tools/adb shell
su
cp /sdcard/temperature.db /data/data/activeng.pt.activenglab/databases/temperature.db

Activities and Layout

Life cycle: DetailActivity must have android:launchMode="singleTop" on AndroidManifest.xml. See launchMode=singleTop.

<activity
            android:name=".DetailActivity"
            android:label="@string/title_activity_detail"
            android:parentActivityName=".MainActivity"
            android:theme="@style/AppTheme.NoActionBar"
            android:launchMode="singleTop" >

Hierarchy

MainActivity
    Action Bar
        Connect
        Settings
    Fragment
        ListView
            Custom View (from ItemSensorCursorAdapter) → Launch DetailActivity(Uri)
                + Current read
                + Set Point | Clear set point
                    Log data/hora
                + Program (sequence of set points)
                    90º 35 minutos (critério de estabilidade) tempo x intervalo
                    130º 35 minutos
                    121º 35 minutos

DetailActivity
    Action Bar
        Record On | off
            EditText (Read comment from user (optional))
        Properties
            Sensor name
            Sensor type
            Record Interval        
        CalibrationActivity
            GridLayout
                (TextView|EditText)+
                Calculate button, Save button
                    Log data/hora
    Fragment
        ListView
            Custom View (from SensorCursorAdapter - just one Sensor)

Charts and Graphs

GraphView

x- axis time resolution

build.gradle (Module:app)

dependencies {
    (...)
    compile 'com.jjoe64:graphview:4.0.1'
    (...)
}

fragment_detail.xml

    <ListView
        android:id="@+id/listview_sensor"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <com.jjoe64.graphview.GraphView
        android:layout_width="match_parent"
        android:layout_height="100dip"
        android:id="@+id/graph" />

Bluetooth (Novo BLE)

http://developer.android.com/guide/topics/connectivity/bluetooth-le.html

Address: D0:39:72:C1:36:54 Name: BlunoV1.8

Bluetooth (to be deprecated...)

Initial support:

BluetoothChatService + Broadcast + Listener in every Activity

Updates e refresh do CursorAdaptor

// TODO http://www.androprogrammer.com/2013/10/database-demo-database-operations-with_13.html

Communication between BluetoothChatService and Activities and Fragments

Possibilities:

Handlers
Broadcast sender and receivers (using Intents).
Local Broadcast sender and receivers (using Intents) ** Local Broadcast has a sendBroadcastSync
EventBus seems a good alternative

Communication used

Local Broadcast

Convertions: String versus Double

Arduino: doubles are always returned with '.' as decimal separator.

Incoming doubles are converted with:

t = Double.parseDouble(parts[2]);
cal_a = Double.parseDouble(calIntent.getStringExtra("cal_a"));

To format doubles as string, we can not use the local locale (to avoid ',' as separator).

We use:

    private final NumberFormat f = NumberFormat.getInstance();

        if (f instanceof DecimalFormat) {
            //((DecimalFormat)f).setDecimalSeparatorAlwaysShown(true);
            f.setMaximumFractionDigits(2);
            f.setMinimumFractionDigits(2);
            DecimalFormatSymbols custom = new DecimalFormatSymbols();
            custom.setDecimalSeparator('.');
            ((DecimalFormat)f).setDecimalFormatSymbols(custom);
        }

and then:

//etCurrentRead.setText( String.format( "%.3f", t ));
etCurrentRead.setText( f.format(t) );

Instead of:

String.format( "%.3f", t )
or
NumberFormat nf = NumberFormat.getInstance();
nf.setMinimumFractionDigits(2);
nf.setMaximumFractionDigits(2);
String output = nf.format(val);

PID

Arduino PID library

Remote synchronization

Status: Faz a query para os sensores; Para cada sensor, vê se existe no servidor e até que data tem dados. Se não existir no servidor, cria o sensor. Falta: Com os sensores criados e com a última data conhecida, falta mandar os dados de cada sensor para o servidor.

        Request URL: http://localhost:3000/direct
        Request Method:POST
        Content-type:application/json

        {
        "action":"AppGeoExt3.PgPersonnel",
        "method":"create",
        "data":[{"name":"Adelaide",
            "email":"adele@gmail.com",
            "phone":"234360101",
            "id":"My1stGeoExt3App.model.Personnel-1"}],
        "type":"rpc",
        "tid":3
        }

        curl -v -H "Content-type: application/json" -d '{"data":[{"id":"5126","email":"anivilar@gmail.com","phone":"910333131","name":"Ana Isabel"}],"action":"AppGeoExt3.PgPersonnel","method":"create","tid":4,"type":"rpc"}' http://192.168.1.101:3000/direct
        curl -v -H "Content-type: application/json" -d @status.json http://localhost:3000/direct

Hide dummy account from Account Settings

Hide dummy account. sync-adapter-without-account

Date and time

Unix time, or POSIX time, is a system for describing points in time, defined as the number of seconds elapsed since midnight proleptic Coordinated Universal Time (UTC) of January 1, 1970, not counting leap seconds.

In Linux:

$ date +%s
1446723851

JAVA

long timeMillis = System.currentTimeMillis();
long timeSeconds = TimeUnit.MILLISECONDS.toSeconds(timeMillis);

Arduino

now() // Returns the current time as seconds since Jan 1 1970

SQLite

Date And Time Functions

Store datetime in SQLite

JAVA System.currentTimeMillis() to Date

SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());
// Android time
Date addedOn = new Date(System.currentTimeMillis());
// Arduino time
Date addedOn = new Date(epoch*1000);

novosValues.put(TemperatureContract.TemperatureEntry.COLUMN_CREATED, dateFormat.format(dateOn) );

Comunication android ←→ server in real time using socket.io

http://socket.io/blog/native-socket-io-and-android/

Android to Arduino protocol

Arduino metadata

header
sensor*

Messages to Arduino

Message	Example
M	M	Metadata request
T	T1446723851	Android epoch to ajust the Arduino clock
I	I2	Reading interval (2 sec.)
P	P	Pause readings

Messages from Arduino

Message	Example
R	`R\|2\|147.681\|1446723851`
T	`T\|1446723851`
T	`T\|1446723851\|1446723851` // TODO
M	`M\|1\|3\|1445125085`
S	`S\|1\|Rita Rocha\|1445122175\|PT 100\|T\|1\|1\|3\|2.738895\|1.007828`
E
P	`P\|On` ou `P\|Off`
W	`W\|Message not recognized`

Arduino DHT11

Two possible libraries that works:

DHTlib (needs a small adjustment on the DHTLIB_TIMEOUT)

cd ~/Arduino/libraries
svn export https://github.com/RobTillaart/Arduino.git/trunk/libraries/DHTlib

Edit DHTlib/dht.h

#ifndef F_CPU
#define DHTLIB_TIMEOUT 10000  // ahould be approx. clock/40000
#else
#define DHTLIB_TIMEOUT (F_CPU/1600) // (F_CPU/40000)
#endif

DHT TEST PROGRAM 
LIBRARY VERSION: 0.1.21

Type,   status, Humidity (%),   Temperature (C)
16000000
DHT11,  OK, 47.0,   17.0
DHT11,  OK, 47.0,   17.0
DHT11,  OK, 47.0,   17.0
DHT11,  OK, 47.0,   17.0
DHT11,  OK, 47.0,   17.0

DHT-sensor-library

DHTtester

DHTxx test!
Humidity: 47.00 %   Temperature: 17.00 *C 
Humidity: 47.00 %   Temperature: 17.00 *C 
Humidity: 47.00 %   Temperature: 17.00 *C 
Humidity: 47.00 %   Temperature: 17.00 *C 
Humidity: 47.00 %   Temperature: 17.00 *C

DHT-sensor-library + Adafruit_DHT_Unified

DHT_Unified_Sensor/DHT_Unified_Sensor.ino

// Depends on the following Arduino libraries:
// - Adafruit Unified Sensor Library: https://github.com/adafruit/Adafruit_Sensor
// - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library

#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>

Output:

DHTxx Unified Sensor Example
------------------------------------
Temperature
Sensor:       DHT11
Driver Ver:   1
Unique ID:    -1
Max Value:    50.00 *C
Min Value:    0.00 *C
Resolution:   2.00 *C
------------------------------------
------------------------------------
Humidity
Sensor:       DHT11
Driver Ver:   1
Unique ID:    -1
Max Value:    80.00%
Min Value:    20.00%
Resolution:   5.00%
------------------------------------
Temperature: 17.000000 *C
Humidity: 45.00%
Temperature: 17.000000 *C
Humidity: 45.00%
Temperature: 17.000000 *C
Humidity: 46.00%

Message	Example
R	`R\|2\|147.681\|1446723851`
T	`T\|1446723851`
T	`T\|1446723851\|1446723851` // TODO
M	`M\|1\|3\|1445125085`
S	`S\|1\|Rita Rocha\|1445122175\|PT 100\|T\|1\|1\|3\|2.738895\|1.007828`
E
P	`P\|On` ou `P\|Off`
W	`W\|Message not recognized`