Hi all
I have a simple app written in MIT App inventor 2. It's throwing out a text data stream once a second as a text file arranged as the following:
Y
###
###
###
\n
The Y at the beginning lets me know the set of data that I am receiving (in this case, 3 sets of 3 digits). That appears to work fine.
I am using the first letter to determine the following data's job.
The following 9 digits are 3x sets of numerical data. If the Bluetooth module sends a 1 for instance, then it always sends the data as 3 digits (so it sends 001). The variable is always between 0-100.
Maybe this is an odd way of sending the data, but I thought it would work.
But, HC-06 is connected to my Teensy 3.2 and I am having difficulty reading this data effectively. Is once a second too often? I would have thought not.
Excuse the scruffy code, it's prototyping time.
Now there is a delay(30) in the serial reading loop which I know is a big no-no, but it actually works better like that.
I will bin all the serial prints, once I know it is working.
What is a better way to read the incoming BT data? Surely it need to decide that there is data, then loop putting that data into commandbuffer[btcount] until it reaches \n.
Any assistance gratefully received.
Code:#include <wavTrigger.h> //Wav trigger library for SFX and music wavTrigger wTrig; //Initialise the wav trigger int led = 13; //------------------ Variables ---------------------- int gRateOffset = 0; // WAV Trigger sample-rate offset int gNumTracks; // Number of tracks on SD card char gWTrigVersion[VERSION_STRING_LEN]; // WAV Trigger version string char commandbuffer[50]; int Size_of_Assembled_array; // The length of the assembled array, including empty spaces int btcount; long actualenginevolume; // The volume we are currently using long pitch = -32767; // Current pitch of the engine sound effect byte enginevolumelevel; // Incoming data byte sfxvolumelevel; byte vehiclespeed; byte startsound; byte startgyro; byte stopsound; byte stopgyro; byte enginesound; byte sfx1; byte sfx2; byte sfx3; byte oldenginevolumelevel; byte oldsfxvolumelevel; byte oldvehiclespeed; //---------------------------------------------------------------------------------------------------------------------------------------------- void setup() { pinMode(led, OUTPUT); Serial.begin(9600); // Debug serial Serial2.begin(9600); // Serial comms to the BT module delay(1000); //-------- Setup the Wav Trigger board ------------- wTrig.start(); // Setup the wav trigger delay(100); wTrig.stopAllTracks(); // Stop all the tracks delay(100); wTrig.samplerateOffset(0); // Set the sample rate to 0 wTrig.setReporting(true); delay(100); wTrig.masterGain(-70); // Reset the master volume gain off the WAV trigger (-70 to +4) delay(500); if (wTrig.getVersion(gWTrigVersion, VERSION_STRING_LEN)) { Serial.print(gWTrigVersion); Serial.print("\n"); gNumTracks = wTrig.getNumTracks(); Serial.print("Number of WAV tracks = "); Serial.print(gNumTracks); Serial.print("\n"); } else { Serial.print("WAV Trigger response not available"); } //---------------- Set up the Bluetooth ---------------- Serial.println("Setting up Bluetooth"); delay(1000); Serial2.write("AT+NAMEBornSFX"); // Set up the bluetooth delay(1000); Serial2.write("AT+PIN1234"); delay(1000); Serial2.write("AT+BAUD4"); Serial.println(F("Bluetooth configuration complete")); //------------------------------------------------------ wTrig.trackPlayPoly(64); // Play track 64 delay(1000); wTrig.samplerateOffset(-32767); // -32767 = one octave down. +32767 = Up one octave wTrig.trackPlayPoly(90); // Play track 90 wTrig.trackLoop(90, 1); // Turn looping of the track on delay(1500); } //============================================================================================================================================== void loop() { if (Serial2.available()) { // If there is BT data, go and get it do { commandbuffer[btcount++] = Serial2.read(); delay(30); } while ((Serial2.available()) && (btcount < 50)); Size_of_Assembled_array = sizeof(commandbuffer); Serial.print("Incoming data: ");Serial.println(commandbuffer); if (btcount > 0) { // If something has arrived, then check it Serial.println(" "); btcount = 0; if (commandbuffer[0] == 'X') { // Full data received (after leaving settings or at app boot) enginevolumelevel = (((commandbuffer[1] - 48) * 100) + ((commandbuffer[2] - 48) * 10) + (commandbuffer[3] - 48)); Serial.print("Engine Volume: "); Serial.println(enginevolumelevel); sfxvolumelevel = (((commandbuffer[4] - 48) * 100) + ((commandbuffer[5] - 48) * 10) + (commandbuffer[6] - 48)); Serial.print("SFX Volume: "); Serial.println(sfxvolumelevel); vehiclespeed = (((commandbuffer[7] - 48) * 100) + ((commandbuffer[8] - 48) * 10) + (commandbuffer[9] - 48)); Serial.print("Vehicle speed: "); Serial.println(vehiclespeed); startsound = (((commandbuffer[10] - 48) * 100) + ((commandbuffer[11] - 48) * 10) + (commandbuffer[12] - 48)); Serial.print("Start sound: "); Serial.println(startsound); startgyro = (((commandbuffer[13] - 48) * 100) + ((commandbuffer[14] - 48) * 10) + (commandbuffer[15] - 48)); Serial.print("Start gyro: "); Serial.println(startgyro); stopsound = (((commandbuffer[16] - 48) * 100) + ((commandbuffer[17] - 48) * 10) + (commandbuffer[18] - 48)); Serial.print("Stop sound: "); Serial.println(stopsound); stopgyro = (((commandbuffer[19] - 48) * 100) + ((commandbuffer[20] - 48) * 10) + (commandbuffer[21] - 48)); Serial.print("Stop gyro: "); Serial.println(stopgyro); enginesound = (((commandbuffer[22] - 48) * 100) + ((commandbuffer[23] - 48) * 10) + (commandbuffer[24] - 48)); Serial.print("Engine sound: "); Serial.println(enginesound); sfx1 = (((commandbuffer[25] - 48) * 100) + ((commandbuffer[26] - 48) * 10) + (commandbuffer[27] - 48)); Serial.print("SFX 1: "); Serial.println(sfx1); sfx2 = (((commandbuffer[28] - 48) * 100) + ((commandbuffer[29] - 48) * 10) + (commandbuffer[30] - 48)); Serial.print("SFX 2: "); Serial.println(sfx2); sfx3 = (((commandbuffer[31] - 48) * 100) + ((commandbuffer[32] - 48) * 10) + (commandbuffer[33] - 48)); Serial.print("SFX 3: "); Serial.println(sfx3); } else if (commandbuffer[0] == 'Y') { // Partial data received enginevolumelevel = (((commandbuffer[1] - 48) * 100) + ((commandbuffer[2] - 48) * 10) + (commandbuffer[3] - 48)); Serial.print("Engine Volume: "); Serial.println(enginevolumelevel); sfxvolumelevel = (((commandbuffer[4] - 48) * 100) + ((commandbuffer[5] - 48) * 10) + (commandbuffer[6] - 48)); Serial.print("SFX Volume: "); Serial.println(sfxvolumelevel); vehiclespeed = (((commandbuffer[7] - 48) * 100) + ((commandbuffer[8] - 48) * 10) + (commandbuffer[9] - 48)); Serial.print("vehiclespeed: "); Serial.println(vehiclespeed); } else if (commandbuffer[0] == 'T') { // SFX 1 Serial.println("Play SFX 1"); wTrig.trackPlayPoly(110); wTrig.update(); } else if (commandbuffer[0] == 'U') { // SFX 2 Serial.println("Play SFX 2"); wTrig.trackPlayPoly(111); wTrig.update(); } else if (commandbuffer[0] == 'V') { // SFX 3 Serial.println("Play SFX 3"); wTrig.trackPlayPoly(112); wTrig.update(); } wTrig.update(); memset(commandbuffer, 0, sizeof(commandbuffer)); } } if (enginevolumelevel != oldenginevolumelevel) { // Adjust the engine volume on the fly actualenginevolume = map(enginevolumelevel, 0, 100, -70, 10); wTrig.masterGain(actualenginevolume); wTrig.update(); oldenginevolumelevel = enginevolumelevel; } if (sfxvolumelevel != oldsfxvolumelevel) { // Adjust the SFX on the fly // Change SFX volume here oldsfxvolumelevel = sfxvolumelevel; } if (vehiclespeed != oldvehiclespeed) { // Adjust the engine sound on the fly // This may need fine tuning pitch = map(vehiclespeed, 0, 100, -32767, 32767); wTrig.samplerateOffset(pitch); wTrig.update(); oldvehiclespeed = vehiclespeed; } } //==============================================================================================================================================
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