2016-11-01 14:54:13 -06:00
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#include "avr/sleep.h"
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2016-11-01 10:52:31 -06:00
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#include "Adafruit_FONA.h"
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2016-11-01 14:54:13 -06:00
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#include "Keypad.h"
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2016-11-01 14:54:13 -06:00
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////////////////////////////////
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////////// PARAMETERS //////////
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////////////////////////////////
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2016-11-01 10:52:31 -06:00
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2016-11-29 20:45:52 -07:00
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#define LED_BAT_LOW 3
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#define LED_NO_SERVICE 2
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#define BUT_ANS A3
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#define BUT_END A4
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#define GSM_RST A2
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#define GSM_RING A5
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#define GSM_BAUDRATE 115200
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// Low battery light threshold
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#define CHG_VLO 3800
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// Time in miliseconds to stop listening for keypad input
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#define SLEEP_TIMEOUT 120000
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// RSSI value below which No Service LED will light
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#define RSSI_THRESHOLD 1
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// Keypad pinout
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byte rowPins[4] = {5, 10, 9, 7};
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byte colPins[3] = {6, 4, 8};
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////////////////////////////////////
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////////// END PARAMETERS //////////
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////////////////////////////////////
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char phoneNumber[15] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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int phoneNumberLength = 0;
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char keys[4][3] = {
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{'1', '2', '3'},
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{'4', '5', '6'},
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{'7', '8', '9'},
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{'*', '0', '#'}
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};
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unsigned long lastActiveTime;
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bool dialtoneActive = false;
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bool startDialtone = false;
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bool awake = true;
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HardwareSerial *fonaSerial = &Serial;
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Adafruit_FONA fona = Adafruit_FONA(GSM_RST);
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Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, 4, 3 );
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///////////////////////////////
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////////// FUNCTIONS //////////
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///////////////////////////////
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void inCall() {
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while (1) {
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if ( !digitalRead(BUT_END) || fona.getCallStatus() < 3 ) { // End button pressed
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fona.hangUp();
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break;
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}
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// numpad stuff
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}
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clearPhoneNumber();
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startDialtone = true;
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delay(100);
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}
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void beginCall() {
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fona.sendCheckReply( F("AT+STTONE=0"), F("OK") ); // End dialtone
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dialtoneActive = false;
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if ( fona.callPhone( phoneNumber ) ) {
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inCall();
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}
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}
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void resumeDialtone() {
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fona.sendCheckReply( ("AT+STTONE=1,20," + String(SLEEP_TIMEOUT)).c_str(), "OK" ); // Start dialtone
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dialtoneActive = true;
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}
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void clearPhoneNumber() {
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for ( int j = 0; j < phoneNumberLength; j++) {
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phoneNumber[j] = 0;
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}
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phoneNumberLength = 0;
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}
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void goToSleep() {
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digitalWrite( LED_NO_SERVICE, LOW );
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digitalWrite( LED_BAT_LOW, LOW );
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awake = false;
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}
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//////////////////////////////////
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///// ARDUINO CORE FUNCTIONS /////
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//////////////////////////////////
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void setup() {
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pinMode( BUT_ANS, INPUT_PULLUP );
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pinMode( BUT_END, INPUT_PULLUP );
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pinMode( GSM_RST, OUTPUT );
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pinMode( GSM_RING, INPUT_PULLUP );
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pinMode( LED_BAT_LOW, OUTPUT);
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pinMode( LED_NO_SERVICE, OUTPUT);
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digitalWrite( LED_BAT_LOW, HIGH );
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digitalWrite( LED_NO_SERVICE, HIGH );
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digitalWrite( GSM_RST, HIGH );
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fonaSerial->begin(GSM_BAUDRATE);
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if (! fona.begin(*fonaSerial)) {
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while (1); //fona didn't start
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digitalWrite( LED_BAT_LOW, HIGH );
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}
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startDialtone = true;
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lastActiveTime = millis();
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fona.sendCheckReply( F("AT+CLVL=100"), F("OK") ); // set volume
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digitalWrite( LED_BAT_LOW, LOW );
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digitalWrite( LED_NO_SERVICE, LOW );
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}
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void loop() {
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if ( awake ) {
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// Handle Incoming Call
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if ( !digitalRead(GSM_RING) ) {
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while ( digitalRead(BUT_ANS) & digitalRead(BUT_END) & !digitalRead(GSM_RING) ) delay(10); // Wait for answer button or end ring/call
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if ( !digitalRead(BUT_ANS) ) {
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fona.pickUp();
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delay(100);
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inCall();
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} else if( !digitalRead(BUT_END) ) {
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fona.hangUp();
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clearPhoneNumber();
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startDialtone = true;
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delay(100);
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}
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}
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// Begin dialtone if necessary
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if ( startDialtone ) {
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resumeDialtone();
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startDialtone = false;
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}
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// Read keypad input
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char key = keypad.getKey();
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if ( key != NO_KEY ) {
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phoneNumber[ phoneNumberLength ] = key;
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phoneNumberLength = phoneNumberLength + 1;
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if ( dialtoneActive ) {
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fona.sendCheckReply( F("AT+STTONE=0"), F("OK") ); // End dialtone
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dialtoneActive = false;
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delay(100);
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}
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fona.playDTMF( key ); // Play DTMF tone
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lastActiveTime = millis();
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// Check for complete phone number (including +1 country code)
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if ( ( phoneNumberLength == 10 & phoneNumber[0] != '1' ) || phoneNumberLength > 10 ) {
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beginCall();
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}
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}
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// Clear stored phone number on press of end button
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if ( !digitalRead(BUT_END) ) {
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clearPhoneNumber();
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resumeDialtone();
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}
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// Indicator LEDs
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uint16_t vbat;
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fona.getBattVoltage(&vbat);
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if ( vbat < CHG_VLO ) {
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digitalWrite( LED_BAT_LOW, HIGH );
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} else {
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digitalWrite( LED_BAT_LOW, LOW );
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}
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uint8_t rssi;
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rssi = fona.getRSSI();
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if ( rssi < RSSI_THRESHOLD || rssi == 99 ) {
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digitalWrite( LED_NO_SERVICE, HIGH );
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} else {
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digitalWrite( LED_NO_SERVICE, LOW );
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}
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// If inactive, sleep
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if ( (long)(millis() - lastActiveTime) > SLEEP_TIMEOUT ) {
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goToSleep();
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}
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} else {
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// sleeping
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if ( !digitalRead( BUT_ANS ) || !digitalRead( BUT_END ) || !digitalRead( GSM_RING ) ) {
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lastActiveTime = millis();
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awake = true;
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}
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}
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}
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