Smayzy/I2D_projet_15_app
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Parses and stores temperature and humidity stats from bluetooth stream

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This commit is contained in:
smayzy 2025-04-18 14:07:07 +02:00
parent ccc3988c51
commit 06c4940a20
1 changed files with 22 additions and 3 deletions
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25
app/src/main/java/ovh/smayzy/i2d_project_15_app/MainActivity.kt
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@ -12,7 +12,9 @@ import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import java.io.BufferedReader
import java.io.IOException
import java.io.InputStreamReader
import java.util.*
class MainActivity : AppCompatActivity() {
@ -27,6 +29,9 @@ class MainActivity : AppCompatActivity() {
private var bluetoothSocket: BluetoothSocket? = null
private var isConnected = false
private data class SensorReading(val secSinceStart: Long, val temperature: Float, val humidity: Float)
private val sensorHistory = mutableListOf<SensorReading>()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
enableEdgeToEdge()
@ -91,13 +96,27 @@ class MainActivity : AppCompatActivity() {
private fun listenForData() {
val inputStream = bluetoothSocket?.inputStream ?: return
val buffer = ByteArray(64)
val reader = BufferedReader(InputStreamReader(inputStream))
while (true) {
try {
val bytes = inputStream.read(buffer)
val message = String(buffer, 0, bytes)
val message = reader.readLine()?.trim() ?: break
Log.i(tag, "Received: $message")
val parts = message.split(";")
if (parts.size == 2) {
val temp = parts[0].toFloatOrNull()
val hum = parts[1].toFloatOrNull()
if (temp != null && hum != null) {
val reading = SensorReading(System.currentTimeMillis(), temp, hum)
sensorHistory.add(reading)
Log.d(tag, "Store: $reading")
} else {
Log.w(tag, "Invalid message format: $message")
}
}
} catch (e: IOException) {
Log.e(tag, "Can't read data", e)
break