1.1. Press buttons, knob, relays, and button LED lights connection
1.1.1. Overview - Items that can be connected
Press key
- Listen to the trigger of each key
b. Knob
- The tuning knob begins to rotate, stops rotating
- Listen button pressed, lifted
- Listen to the rotation progress of the tuning knob
Relay
- Get the current relay status
- Control relay
- Receive relay status
d. LED light switch control
- LED lights switch on and off at each node
1.1.2. Access process
Preparation stage
Own a Shengbeike background music player, with relay button (such as M10, S10)
Download demo
Link: https://pan.baidu.com/s/179xcJ6HirWoDVofAcsJN5A Password: 3vix, File Directory: Button-Switch-Relay-demo
Caution notices
1. When aligning the rotary switch, the system's rotary switch UI is still present and will respond to switch events, so it is necessary to disable the system's switch in advance.
Disable steps
The first method is to download the integrated jdcommon library and set the properties. Click to download jdsmart-common In the application, call JdSystemProperty.setString("persist.sys.jd.hideBindDev", "1"). Set the value of persist.sys.jd.hideBindDev to 1 (1 hides, 0 restores)
The second method (assuming the computer has an adb environment), connect the host and computer via USB, and directly set the properties on the computer using the adb command: adb shell setprop persist.sys.jd.hideBindDev 1. After setting, you can use getprop persist.sys.jd.hideBindDev to check if the setting is successful. If the setting is successful, restart the machine. At this time, when operating the switch, the system UI will not appear.
1.1.3. Specifically link up
Register broadcast receiver in AndroidManifest.xml
//Relay switch status
<action android:name="com.judian.broadcast.relay.powerStatus" />
//Press buttons, knob
<!--* S10 has knob, 2 buttons：
* judian.intent.action.key1 //Knob press true, lift false
* judian.intent.action.key2 //Button above the knob pressed true, lifted false
* judian.intent.action.key3 //Button pressed below the knob is true, lifted is false
* judian.intent.action.key4 //The knob starts to rotate true, ends to rotate false
*
* M10 has no knob, three buttons：
* judian.intent.action.key1 //Top button 1 triggers
* judian.intent.action.key2 //Press middle button 2 to trigger
* judian.intent.action.key3 //Press the bottom button 3 to trigger-->
<action android:name="judian.intent.action.key1" />
<action android:name="judian.intent.action.key2" />
<action android:name="judian.intent.action.key3" />
<action android:name="judian.intent.action.key4" />
2. Third-party interface control relay
Through the broadcast com.judian.broadcast.relay.control to send
Agreed to set the two relay IDs as judianRelayId-1 and judianRelayId-2
Broadcast parameters "relay":"json"
The JSON format is as follows:
{
"id": "judianRelayId-1",
"powerStatus": true
}
such as： JSONObject jsonObject = new JSONObject();
jsonObject.put("id",relayDevId);
jsonObject.put("powerStatus",status);
Intent intent = new Intent();
intent.setAction("com.judian.broadcast.relay.control");
intent.putExtra("relay", jsonObject.toJSONString());
sendBroadcast(intent);
3. Receiving and actively querying relay status
If you actively query the relay status, you can read the node information /sys/xfocus/xpower/relay1 /sys/xfocus/xpower/relay2 to read the node status, 1 is on
such as： public static String readFile(String path) {
String status = "";
if(new File(path).exists()){
try {
BufferedReader reader = new BufferedReader(new FileReader(path));
status = reader.readLine();
} catch (IOException e) {
e.printStackTrace();
}
}
return status;
}
Broadcasting the current status of the relay: com.judian.broadcast.relay.powerStatus, broadcast parameters "relay":"json", as received by RelayReceiver in the deme
JSON format is as follows：
{
"id": "judianRelayId-1",
"powerStatus": true
}
4. The buttons and knob only need to receive the corresponding action
Action reference->"1. Register broadcast receiver in AndroidManifest.xml"
@Override
public void onReceive(Context context, Intent intent) {
final String key = intent.getAction();
final boolean pressed = intent.getBooleanExtra("down", false);
}
5. LED light switch control
M10, S10 has three LEDs, the device node path is located under /sys/class/leds/. Note that the ledx in the following path can be replaced (led1, led2, led3), depending on the nodes under the path
//Modify the value written to the specified node path
public static void writeFile(String path, String value) {
File modefile = new File(path);
if (modefile.exists()) {
try {
RandomAccessFile file = new RandomAccessFile(path, "rw");
file.write(value.getBytes());
file.close();
Log.d(TAG, "setString = "+value);
} catch (IOException re) {
Log.e(TAG, "setString: "+re.toString());
} catch (NumberFormatException re) {
Log.e(TAG, "setString: "+re.toString());
}
}
}
# Turn on the light (write 1 to brightness)
lily-c10-zigbee: # echo 1 > /sys/class/leds/ledx/brightness
as writeFile("/sys/class/leds/led2/brightness","1");
# Turn off the light (write 0 to brightness)
lily-c10-zigbee: # echo 0 > /sys/class/leds/ledx/brightness
as writeFile("/sys/class/leds/led2/brightness","0");
# Check status (read brightness one byte)
lily-c10-zigbee: # cat /sys/class/leds/ledx/brightness
1
as readFile("/sys/class/leds/led2/brightness");
Blink control (blinking at a certain frequency)
# Start blinking (default blinking at 50Hz frequency)
lily-c10-zigbee: # echo timer > /sys/class/leds/ledx/trigger
as writeFile("/sys/class/leds/led2/trigger","timer");
# Turn off blinking
lily-c10-zigbee: # echo none > /sys/class/leds/ledx/trigger
as writeFile("/sys/class/leds/led2/trigger","none");
2. Modify the flash frequency (only effective when the trigger is set to timer mode)
# Set the on/off time (i.e., modify the blinking frequency), unit ms
lily-c10-zigbee: # echo 1000 > /sys/class/leds/ledx/delayon #on 1000ms
lily-c10-zigbee: # echo 500 > /sys/class/leds/ledx/delayoff #off 500ms
Check the trigger status. The device trigger is set to timer, so you should see [timer] in the output, and [none] if it has not been triggered
lily-c10-zigbee: # cat /sys/class/leds/ledx/trigger
[none] rfkill0 mmc0 mmc1 mmc2 timer rfkill1
The [none] in the output text is enclosed in two square brackets, meaning that the current trigger is not being used. The device trigger is set to timer, so you should see [timer] in the output accordingly.
none rfkill0 mmc0 mmc1 mmc2 [timer] rfkill1