Schermo a risoluzione 1024x600 con connessione HDMI.
Lo ho comprato a 35 euro
per utilizzarlo con Raspberry si modifica il file confix.txt nella SdCard
max_usb_current=1
hdmi_force_hotplug=1
config_hdmi_boost=10
hdmi_group=2
hdmi_mode=87
hdmi_cvt 1024 600 60 6 0 0 0
Lo schermo si puo' usarea come display secondario su Debian senza nessuna ulteriore configurazione
Ho provato la Arducam 16 Mpx basata sul sensore Sony IMX519
Per prima cosa c'e' da evindenziare che il supporto non e' nativo su Raspberry a differenza delle PiCam. Le istruzioni per montare il driver si trovano a questo link
https://docs.arducam.com/Raspberry-Pi-Camera/Native-camera/16MP-IMX519/
Ho provato ad accoppiare la Pi Cam HQ module 12 MPx (vecchiotta ma e' sempre un sensore Sony) con un spotting scope della Celestron MK70 MiniMak (fortunatamente comprato di seconda mano). E' stato impiegato un adattatore da CS (lato PiCam) ad oculare 1.25 inch (standard telescopi) stampato 3D la filettatura non era perfetta ma il fatto di essere fatto di plastica permette un buon accoppiamento forzando un po'
direi un ottimo risultato
Per accenderere una Raspberry e' sufficiente mettere allo stato zero il pin GPIO3..quindi basta collegare con un cavo (non in maniera permanente) il pin GPIO ed un pin GND
/usr/bin/tvservice -o
service apache2 start sleep 1 hostapd -B /etc/hostapd/hostapd.conf sleep 2 ifconfig br0 up ifconfig br0 10.1.1.1 netmask 255.255.255.0 sysctl net.ipv4.ip_forward=1 iptables --flush iptables -t nat --flush iptables -t nat -A PREROUTING -i br0 -p udp -m udp --dport 53 -j DNAT --to-destination 10.1.1.1:53 iptables -t nat -A PREROUTING -i br0 -p tcp -m tcp --dport 80 -j DNAT --to-destination 10.1.1.1:80 iptables -t nat -A PREROUTING -i br0 -p tcp -m tcp --dport 443 -j DNAT --to-destination 10.1.1.1:80 iptables -t nat -A POSTROUTING -j MASQUERADE service dnsmasq start exit 0 ----------------------------------------------------------- hostapd.conf -----------------------------------------------------------
dnsmasq.conf ------------------------------------------------------------
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| Schermata di raspi-config |
apply plugin: 'com.android.application'
android {
compileSdkVersion 21 buildToolsVersion "21.1.2"
defaultConfig {
applicationId "luca_innocenti.beacontrasmitter" minSdkVersion 21 targetSdkVersion 21 versionCode 1 versionName "1.0" }
buildTypes {
release {
minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' }
}
}
final def var = repositories {
jcenter{
url "http://jcenter.bintray.com/" }
}
var
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.google.android.support:wearable:1.2.0' compile 'com.google.android.gms:play-services-wearable:7.5.0'}
dependencies {
compile 'org.altbeacon:android-beacon-library:2+'
} package luca_innocenti.beacontrasmitter;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.wearable.view.WatchViewStub;
import android.view.View;
import android.widget.Button;
import android.widget.SeekBar;
import android.widget.TextView;
import android.bluetooth.BluetoothManager;
import android.content.Context;
import android.content.pm.PackageManager;
import org.altbeacon.beacon.Beacon;
import org.altbeacon.beacon.BeaconParser;
import org.altbeacon.beacon.BeaconTransmitter;
import org.altbeacon.beacon.Identifier;
import java.util.Arrays;
@TargetApi(21)
public class MainActivity extends Activity {
private BeaconTransmitter mBeaconTransmitter;
private TextView testo;
private SeekBar barra;
private Button pulsante;
private int stato;
private TextView testo2;
private TextView testo3;
private void trasmetti(){
if (checkPrerequisites()) {
// //mBeaconTransmitter = new BeaconTransmitter(this, new BeaconParser().setBeaconLayout("m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25")); mBeaconTransmitter = new BeaconTransmitter(this, new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));
//beaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:0-3=4c000215,i:4-19,i:20-21,i:22-23,p:24-24")); // iBeacons
//beaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24")); // Estimotes
//beaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:0-3=a7ae2eb7,i:4-19,i:20-21,i:22-23,p:24-24")); // easiBeacons
// uuid estimote B9407F30-F5F8-466E-AFF9-25556B57FE6D
Beacon beacon = new Beacon.Builder()
.setId1("B9407F30-F5F8-466E-AFF9-25556B57FE6D")
.setId2("999")
.setId3(testo.getText().toString())
.setManufacturer(0x015D) // Simula Estimote .setTxPower(-59)
.setDataFields(Arrays.asList(new Long[]{0l}))
.build();
mBeaconTransmitter.startAdvertising(beacon);
stato = 1;
}
}
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final WatchViewStub stub = (WatchViewStub) findViewById(R.id.watch_view_stub);
stub.setOnLayoutInflatedListener(new WatchViewStub.OnLayoutInflatedListener() {
@Override public void onLayoutInflated(WatchViewStub stub) {
barra = (SeekBar) stub.findViewById(R.id.seekBar);
testo = (TextView) stub.findViewById(R.id.textView);
testo2 = (TextView) stub.findViewById(R.id.textView2);
testo3 = (TextView) stub.findViewById(R.id.textView3);
pulsante = (Button) stub.findViewById(R.id.button);
barra.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
testo.setText(String.valueOf(new Integer(progress)));
}
@Override public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override public void onStopTrackingTouch(SeekBar seekBar) {
}
}
);
pulsante.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View v) {
testo2.setText("Trasmitter ON");
testo3.setText("B9407F30-F5F8-466E-AF\nF9-25556B-57FE6D-999-"+testo.getText());
pulsante.setEnabled(false);
barra.setEnabled(false);
trasmetti();
}
});
}
});
}
@Override protected void onDestroy() {
super.onDestroy();
if (stato == 1) {
mBeaconTransmitter.stopAdvertising();
}
}
@TargetApi(21)
private boolean checkPrerequisites() {
if (android.os.Build.VERSION.SDK_INT < 18) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Bluetooth LE not supported by this device's operating system");
builder.setMessage("You will not be able to transmit as a Beacon");
builder.setPositiveButton(android.R.string.ok, null);
builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override public void onDismiss(DialogInterface dialog) {
finish();
}
});
builder.show();
return false;
}
if (!getApplicationContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE)) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Bluetooth LE not supported by this device");
builder.setMessage("You will not be able to transmit as a Beacon");
builder.setPositiveButton(android.R.string.ok, null);
builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override public void onDismiss(DialogInterface dialog) {
finish();
}
});
builder.show();
return false;
}
if (!((BluetoothManager) getApplicationContext().getSystemService(Context.BLUETOOTH_SERVICE)).getAdapter().isEnabled()){
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Bluetooth not enabled");
builder.setMessage("Please enable Bluetooth and restart this app.");
builder.setPositiveButton(android.R.string.ok, null);
builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override public void onDismiss(DialogInterface dialog) {
finish();
}
});
builder.show();
return false;
}
try {
// Check to see if the getBluetoothLeAdvertiser is available. If not, this will throw an exception indicating we are not running Android L ((BluetoothManager) this.getApplicationContext().getSystemService(Context.BLUETOOTH_SERVICE)).getAdapter().getBluetoothLeAdvertiser();
}
catch (Exception e) {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Bluetooth LE advertising unavailable");
builder.setMessage("Sorry, the operating system on this device does not support Bluetooth LE advertising. As of July 2014, only the Android L preview OS supports this feature in user-installed apps.");
builder.setPositiveButton(android.R.string.ok, null);
builder.setOnDismissListener(new DialogInterface.OnDismissListener() {
@Override public void onDismiss(DialogInterface dialog) {
finish();
}
});
builder.show();
return false;
}
return true;
}
}
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Per leggere la prossimita' dell'orologio ho montato sulla Raspberry un dongle Broadcome (gia' visto qui) ed il programma in Python iBeacon-Scanner (Github) leggermente modificato
Il programma cicla fino quando non vede un dispositivo con minor=1, allora controlla l'Rssi e stima la distanza. Se la distanza e' inferiore ad un determinato valore si puo' agire sulle porte GPIO ed attivare il rele' (funzione da implementare ma di facilissima realizzazione)
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| Raspberry |
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| Arduino |
Aggiornamento In realta' il Jtag USB funziona anche sui moduli cinesi Il problema risiede nell'ID USB della porta Jtag. Nel modulo...
