/*
* Description: This example shows how to record sound from the microphone
* and then play the file with the sound recorded.
* This example shows the AT commands (and the answers of the module) used
* to work with audio commands. For more information about the AT commands,
* refer to the AT command manual.
*
* Copyright (C) 2013 Libelium Comunicaciones Distribuidas S.L.
* http://www.libelium.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Version 0.2
* Author: Alejandro Gallego
*/
int8_t answer, counter;
int onModulePin = 2;
char clip_name[20];
char aux_str[50];
void setup(){
pinMode(onModulePin, OUTPUT);
Serial.begin(115200);
Serial.println("Starting...");
power_on();
delay(5000);
// Takes a picture, but not saved it
answer = sendATcommand2("AT+CQCPREC=0,amr", "C:/Audio/", "ERROR", 5000);
if (answer == 1)
{
counter = 0;
while(Serial.available()==0);
do{
clip_name[counter] = Serial.read();
counter++;
while(Serial.available()==0);
}
while (clip_name[counter-1] != 0x0D);
clip_name[counter-1] = '\0';
Serial.print("Clip name: ");
Serial.println(clip_name);
delay(5000);
sendATcommand2("AT+CQCPPAUSE", "OK", "ERROR", 2000);
delay(5000);
sendATcommand2("AT+CQCPRESUME", "OK", "ERROR", 2000);
delay(5000);
sendATcommand2("AT+CQCPSTOP", "OK", "ERROR", 2000);
sendATcommand2("AT+FSCD=C:/Audio", "OK", "ERROR", 2000);
sprintf(aux_str, "AT+CCMXPLAY=\"%s\",0", clip_name);
answer = sendATcommand2(aux_str, "OK", "ERROR", 2000);
if (answer == 1)
{
delay(5000);
sendATcommand2("AT+CCMXPAUSE", "OK", "ERROR", 2000);
delay(5000);
sendATcommand2("AT+CCMXRESUME", "OK", "ERROR", 2000);
delay(5000);
sendATcommand2("AT+CCMXSTOP", "OK", "ERROR", 2000);
}
else
{
Serial.println("Error playing");
}
}
else
{
Serial.println("Error recording");
}
}
void loop(){
}
void power_on(){
uint8_t answer=0;
// checks if the module is started
answer = sendATcommand("AT", "OK", 2000);
if (answer == 0)
{
// power on pulse
digitalWrite(onModulePin,HIGH);
delay(3000);
digitalWrite(onModulePin,LOW);
// waits for an answer from the module
while(answer == 0){ // Send AT every two seconds and wait for the answer
answer = sendATcommand("AT", "OK", 2000);
}
}
}
int8_t sendATcommand(char* ATcommand, char* expected_answer1, unsigned int timeout){
return sendATcommand2(ATcommand, expected_answer1, "", timeout);
}
int8_t sendATcommand2(char* ATcommand, char* expected_answer1, char* expected_answer2,
unsigned int timeout){
uint8_t x=0, answer=0;
char response[100];
unsigned long previous;
memset(response, '\0', 100); // Initialize the string
delay(100);
while( Serial.available() > 0) Serial.read(); // Clean the input buffer
Serial.println(ATcommand); // Send the AT command
x = 0;
previous = millis();
// this loop waits for the answer
do{
// if there are data in the UART input buffer, reads it and checks for the asnwer
if(Serial.available() != 0){
response[x] = Serial.read();
x++;
// check if the desired answer 1 is in the response of the module
if (strstr(response, expected_answer1) != NULL)
{
answer = 1;
}
// check if the desired answer 2 is in the response of the module
if (strstr(response, expected_answer2) != NULL)
{
answer = 2;
}
}
// Waits for the asnwer with time out
}while((answer == 0) && ((millis() - previous) < timeout));
return answer;
}