commit 1ef6549c684799a51dcdf20819837942aa7368a0
Author: Brendan Haines <brendan.haines@gmail.com>
Date:   Tue Nov 1 10:52:31 2016 -0600

    adds arduino code

diff --git a/hohm_phone.ino b/hohm_phone.ino
new file mode 100644
index 0000000..5babd9c
--- /dev/null
+++ b/hohm_phone.ino
@@ -0,0 +1,107 @@
+#include <avr/sleep.h>
+#include "Adafruit_FONA.h"
+
+//////////////////////
+///// PARAMETERS /////
+//////////////////////
+
+// Arduino will wake from sleep when WAKE_PIN is pulled low
+#define WAKE_PIN 2
+#define BUT_ANS 7
+#define BUT_END 8
+
+// RX/TX are in reference to the Arduino
+#define GSM_RX 3
+#define GSM_TX 4
+#define GSM_RST 5
+#define GSM_RING 6
+
+// TIMEOUT_SLEEP is the time to stay awake from last activity until sleep (milliseconds)
+#define TIMEOUT_SLEEP
+
+// Comment the following line to use HW serial
+#define usb_testing_config
+
+//////////////////////////
+///// END PARAMETERS /////
+//////////////////////////
+
+char replybuffer[255];
+uint8_t phonenumber[15];
+uint8_t phonenumberlength = 0;
+
+#ifdef usb_testing_config
+#include "SoftwareSerial.h"
+SoftwareSerial fonaSS = SoftwareSerial(GSM_RX, GSM_TX);
+SoftwareSerial *fonaSerial = &fonaSS;
+#else
+HardwareSerial *fonaSerial = &Serial;
+#endif
+
+Adafruit_FONA fona = Adafruit_FONA(GSM_RST);
+
+uint8_t readline(char *buff, uint8_t maxbuff, uint16_t timeout = 0);
+
+
+void wake_from_sleep() {
+  sleep_disable();
+  detachInterrupt(WAKE_PIN);
+}
+
+void go_to_sleep() {
+  sleep_enable();
+  attachInterrupt(WAKE_PIN, wake_from_sleep, LOW);
+  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+  cli();
+  sleep_bod_disable();
+  sei();
+  sleep_cpu();
+}
+
+void in_call() {
+  while (1) {
+    if ( !digitalRead(BUT_END) ) { // End button pressed
+      if ( fona.hangUp() ) {
+        break;
+      }
+    }
+    // numpad stuff
+  }
+}
+
+void begin_call() {
+  fona.sendCheckReply( F("AT+STTONE=0"), F("OK") ); // End tone
+  for(int i = 0; i<phonenumberlength; i++){
+    fona.playDTMF( phonenumber[i] );
+    if( fona.callPhone( phonenumber ) ) {
+      in_call();
+    }
+    for( int j = 0; j<phonenumberlength; j++) {
+      phonenumber[j] = 0;
+    }
+    phonenumberlength = 0;
+  }
+}
+
+void setup() {
+  fonaSerial->begin(4800);
+  if (! fona.begin(*fonaSerial)) while (1); //fona didn't start
+}
+
+void loop() {
+  if ( !digitalRead(GSM_RING) ) {
+    while ( digitalRead(BUT_ANS) & !digitalRead(GSM_RING) ) delay(10); // Wait for answer button or end ring/call
+    if ( !digitalRead(BUT_ANS) ) {
+      if ( fona.pickUp() ) {
+        in_call();
+      }
+    }
+  }
+
+  fona.sendCheckReply( F("AT+STTONE=1,20,1000"), F("OK") ); // Start tone
+}
+
+
+
+
+