Added a debug panel

final

app/src/main/java/com/geeksville/mesh/database/MeshtasticDatabase.kt

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+package com.geeksville.mesh.database
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import com.geeksville.mesh.database.dao.PacketDao
+import com.geeksville.mesh.database.entity.Packet
+
+@Database(entities = [Packet::class], version = 1, exportSchema = false)
+abstract class MeshtasticDatabase : RoomDatabase() {
+    abstract fun packetDao(): PacketDao
+
+    companion object {
+        @Volatile
+        private var INSTANCE: MeshtasticDatabase? = null
+
+        fun getDatabase(
+            context: Context
+        ): MeshtasticDatabase {
+            return INSTANCE ?: synchronized(this) {
+                val instance = Room.databaseBuilder(
+                    context.applicationContext,
+                    MeshtasticDatabase::class.java,
+                    "meshtastic_database"
+                )
+                    .fallbackToDestructiveMigration()
+                    .build()
+                INSTANCE = instance
+
+                instance
+            }
+        }
+    }
+
+}

app/src/main/java/com/geeksville/mesh/database/PacketRepository.kt

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+package com.geeksville.mesh.database
+
+import androidx.lifecycle.LiveData
+import com.geeksville.mesh.database.dao.PacketDao
+import com.geeksville.mesh.database.entity.Packet
+
+class PacketRepository(private val packetDao : PacketDao) {
+    val allPackets : LiveData<List<Packet>> = packetDao.getAllPacket(500)
+
+    suspend fun insert(packet: Packet) {
+        packetDao.insert(packet)
+    }
+
+    suspend fun deleteAll() {
+        packetDao.deleteAll()
+    }
+}

app/src/main/java/com/geeksville/mesh/database/dao/PacketDao.kt

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+package com.geeksville.mesh.database.dao
+
+import androidx.lifecycle.LiveData
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.Query
+import com.geeksville.mesh.database.entity.Packet
+
+@Dao
+interface PacketDao {
+
+    @Query("Select * from packet order by rowid desc limit 0,:maxItem")
+    fun getAllPacket(maxItem: Int): LiveData<List<Packet>>
+
+    @Insert
+    fun insert(packet: Packet)
+
+    @Query("DELETE from packet")
+    fun deleteAll()
+
+}

app/src/main/java/com/geeksville/mesh/database/entity/Packet.kt

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+package com.geeksville.mesh.database.entity
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+
+@Entity(tableName = "packet")
+data class Packet(@PrimaryKey val uuid: String,
+                  @ColumnInfo(name = "type") val message_type: String,
+                  @ColumnInfo(name = "received_date") val received_date: Long,
+                  @ColumnInfo(name = "message") val raw_message: String
+) {
+
+
+
+}