How to use Grove Serial Bluetooth v3.0
This
What Adafruitis MAX9814Grove microphoneSerial amplifierBluetooth allows you to easily detect sound. v3.0
ThereGrove are- aSerial totalBluetooth ofis fivean connectionseasy-to-use onmodule compatible with the existing Grove Base Shield, and designed for transparent wireless serial connection setup. In this mic, howevertutorial, we will only be using VCC,two GNDGrove Serial Bluetooth modules and OUTtwo inArduino ourto wiring.perform a wireless communication.
You can read more about this component here.
Wiring (Master - Sending data)
Interrupt Pins for RX/TX
In this tutorial, I am using an UNO which has pin 2 & 3 as the interrupts pins. Check the model you are using and change the pins accordingly.
PowerVCC (VCCRed) to3.3V)5VGroundGND (GNDBlack) toGND)GNDOutputRX (White) toanalogpin 3- TX (Yellow) to pin
on2 - Button to
A0)GND - Button to pin 13
There are threefour wires:
RetrievingWiring Data(Slave - Receving data)
- VCC (Red) to 5V
- GND (Black) to GND
- RX (White) to pin 3
- TX (Yellow) to pin 2
Code - Master
This code allows instructs the mic to detect and prints out values corresponding to the sound's varying volume.
int
MicPin/*
=* A0;FM.h
int* MicVolumeA =library 0;for SeeedStudio Grove FM
*
* Copyright (c) 2012 seeed technology inc.
* Website : www.seeed.cc
* Author : Steve Chang
* Create Time: JULY 2014
* Change Log : Modified by loovee 2013-10-29 , Modified by jacob yan 2014-7-29
* The MIT License (MIT)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <SoftwareSerial.h> // DefineSoftware aSerial variablePort
MicVolume#define andRxD initialize2
it#define toTxD 03
#define PINBUTTON 13 // pin of button
#define DEBUG_ENABLED 1
SoftwareSerial blueToothSerial(RxD,TxD);
void setup()
{
Serial.begin(115200)9600);
pinMode(RxD, INPUT);
pinMode(TxD, OUTPUT);
pinMode(PINBUTTON, INPUT_PULLUP);
setupBlueToothConnection();
//wait Initialize1s and flush the serial communicationbuffer
delay(1000);
Serial.flush();
blueToothSerial.flush();
}
void loop()
{
MicVolumestatic unsigned char state = analogRead(MicPin)1; // led off
//Serial.println(digitalRead(PINBUTTON));
if(digitalRead(PINBUTTON))
{
//state = 1-state;
Serial.println(MicVolume)"button on");
blueToothSerial.print(state);
delay(10);
while(digitalRead(PINBUTTON)) // until button release
{
delay(10);
}
Serial.println("button off");
}
}
/***************************************************************************
* Function Name: setupBlueToothConnection
* Description: initilizing bluetooth connction
* Parameters:
* Return:
***************************************************************************/
void setupBlueToothConnection()
{
blueToothSerial.begin(9600);
blueToothSerial.print("AT");
delay(400);
blueToothSerial.print("AT+DEFAULT"); // Restore all setup value to factory setup
delay(2000);
blueToothSerial.print("AT+NAMESeeedMaster"); // set the bluetooth name as "SeeedMaster" ,the length of bluetooth name must less than 12 characters.
delay(400);
blueToothSerial.print("AT+ROLEM"); // set the bluetooth work in slave mode
delay(400);
blueToothSerial.print("AT+AUTH1");
delay(400);
blueToothSerial.print("AT+CLEAR"); // Clear connected device mac address
delay(400);
blueToothSerial.flush();
}
You
Code can- checkSlave
/*
your* circuitFM.h
* A library for SeeedStudio Grove FM
*
* Copyright (c) 2012 seeed technology inc.
* Website : www.seeed.cc
* Author : Steve Chang
* Create Time: JULY 2014
* Change Log : Modified by loovee 2013-10-29 , Modified by jacob yan 2014-7-29
* The MIT License (MIT)
*
* Permission is workinghereby bygranted, lookingfree atof charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the SerialSoftware Plotter;without Inrestriction, including without limitation the menurights
bar go* to Toolsuse, >copy, Serialmodify, Plottermerge, publish, distribute, sublicense, and/or presssell
Command* +copies Shiftof +the LSoftware, onand yourto keyboard.permit Makepersons sureto thiswhom the Software is
set* furnished to 115200do baud.so, 
To utilise this data, you can temporarily slow down the data coming in from the mic and looksubject to the Serialfollowing Monitorconditions:
*
* The above copyright notice and this time,permission tonotice setshall upbe yourincluded ownin
threshold,* e.g.all :
copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <SoftwareSerial.h> //Software Serial Port
#define RxD 2
#define TxD 3
#define PINLED 13
#define LEDON() digitalWrite(PINLED, HIGH)
#define LEDOFF() digitalWrite(PINLED, LOW)
#define DEBUG_ENABLED 1
SoftwareSerial blueToothSerial(RxD,TxD);
void setup()
{
Serial.begin(9600);
pinMode(RxD, INPUT);
pinMode(TxD, OUTPUT);
pinMode(PINLED, OUTPUT);
LEDOFF();
setupBlueToothConnection();
}
void loop()
{
MicVolumechar recvChar;
while(1)
{
if(blueToothSerial.available())
{//check if there's any data sent from the remote bluetooth shield
recvChar = analogRead(MicPin)blueToothSerial.read();
ifSerial.print(recvChar);
(MicVolumeif(recvChar >== 400)'1')
{
// If the volume is above this threshold a warning comes up in the Serial Monitor
Serial.println("Loud noise"LEDON();
delay(500);
}
else if(recvChar == '0')
{
Serial.println(MicVolume)LEDOFF();
}
}
}
}
/***************************************************************************
* Function Name: setupBlueToothConnection
* Description: initilizing bluetooth connction
* Parameters:
* Return:
***************************************************************************/
void setupBlueToothConnection()
{
blueToothSerial.begin(9600);
blueToothSerial.print("AT");
delay(400);
blueToothSerial.print("AT+DEFAULT"); // Restore all setup value to factory setup
delay(2000);
blueToothSerial.print("AT+NAMESeeedBTSlave"); // set the bluetooth name as "SeeedBTSlave" ,the length of bluetooth name must less than 12 characters.
delay(400);
blueToothSerial.print("AT+PIN0000"); // set the pair code to connect
delay(400);
blueToothSerial.print("AT+AUTH1"); //
delay(400);
blueToothSerial.flush();
}
Connection
After uploading both codes to both Arduinos, reset them simultaneously. The LEDs on the modules will be flashing and wait until they stay on, then they are connected.
You may need to repeat a couple of times to get them connected, it's all about patience.
