Add voice class

src/sfe_lara_r6.h

@@ -2,14 +2,15 @@
 #define SFE_LARA_R6_LIBRARY_H
 
 #include "sfe_ublox_cellular.h"
+#include "sfe_ublox_cellular_voice.h"
 
 // Base LARA-R6 class
-class LARA_R6: public UBX_CELL
+class LARA_R6: virtual public UBX_CELL
 {
 
 };
 
-class LARA_R6001: public LARA_R6
+class LARA_R6001: public LARA_R6, public UBX_CELL_VOICE
 {
 
 };
@@ -19,7 +20,7 @@ class LARA_R6001D: public LARA_R6
 
 };
 
-class LARA_R6401: public LARA_R6
+class LARA_R6401: public LARA_R6, public UBX_CELL_VOICE
 {
 
 };
@@ -29,7 +30,7 @@ class LARA_R6401D: public LARA_R6
 
 };
 
-class LARA_R6801_00B: public LARA_R6
+class LARA_R6801_00B: public LARA_R6, public UBX_CELL_VOICE
 {
 
 };

src/sfe_ublox_cellular_voice.cpp

@@ -0,0 +1,112 @@
+#include "sfe_ublox_cellular_voice.h"
+
+UBX_CELL_error_t UBX_CELL_VOICE::dial(String number)
+{
+  char *command;
+  char *numberCStr;
+  UBX_CELL_error_t err;
+
+  numberCStr = ubx_cell_calloc_char(number.length() + 1);
+  if (numberCStr == nullptr)
+    return UBX_CELL_ERROR_OUT_OF_MEMORY;
+  number.toCharArray(numberCStr, number.length() + 1);
+
+  command = ubx_cell_calloc_char(strlen(UBX_CELL_COMMAND_DIAL) + strlen(numberCStr) + 3);
+  if (command != nullptr)
+  {
+    // Heads up! The dial command is one of the only commands that requires a
+    // semicolon at the end of it!
+    sprintf(command, "%s=%s;", UBX_CELL_COMMAND_DIAL, numberCStr);
+
+    err = sendCommandWithResponse(command, UBX_CELL_RESPONSE_OK,
+                                  nullptr, UBX_CELL_10_SEC_TIMEOUT);
+
+    free(command);
+  }
+  else
+  {
+    err = UBX_CELL_ERROR_OUT_OF_MEMORY;
+  }
+
+  free(numberCStr);
+
+  return err;
+}
+
+UBX_CELL_error_t UBX_CELL_VOICE::answer(void)
+{
+  return sendCommandWithResponse(UBX_CELL_COMMAND_ANSWER, UBX_CELL_RESPONSE_OK_OR_ERROR,
+                                nullptr, UBX_CELL_STANDARD_RESPONSE_TIMEOUT);
+}
+
+UBX_CELL_error_t UBX_CELL_VOICE::hangUp(void)
+{
+  return sendCommandWithResponse(UBX_CELL_COMMAND_HANG_UP, UBX_CELL_RESPONSE_OK_OR_ERROR,
+                                nullptr, UBX_CELL_STANDARD_RESPONSE_TIMEOUT);
+}
+
+UBX_CELL_error_t UBX_CELL_VOICE::playAudioResource(uint8_t audio_resource, uint8_t tone_id, uint8_t nof_repeat)
+{
+  UBX_CELL_error_t err;
+  char *command;
+
+  command = ubx_cell_calloc_char(strlen(UBX_CELL_COMMAND_PLAY_AUDIO) + 13);
+  if (command == nullptr)
+    return UBX_CELL_ERROR_OUT_OF_MEMORY;
+  sprintf(command, "%s=%d,%d,%d", UBX_CELL_COMMAND_PLAY_AUDIO, audio_resource, tone_id, nof_repeat);
+
+  err = sendCommandWithResponse(command, UBX_CELL_RESPONSE_OK_OR_ERROR,
+                                nullptr, UBX_CELL_STANDARD_RESPONSE_TIMEOUT);
+  free(command);
+  return err;
+}
+
+UBX_CELL_error_t UBX_CELL_VOICE::stopAudioResource(uint8_t audio_resource)
+{
+  UBX_CELL_error_t err;
+  char *command;
+
+  command = ubx_cell_calloc_char(strlen(UBX_CELL_COMMAND_STOP_AUDIO) + 5);
+  if (command == nullptr)
+    return UBX_CELL_ERROR_OUT_OF_MEMORY;
+  sprintf(command, "%s=%d", UBX_CELL_COMMAND_STOP_AUDIO, audio_resource);
+
+  err = sendCommandWithResponse(command, UBX_CELL_RESPONSE_OK_OR_ERROR,
+                                nullptr, UBX_CELL_STANDARD_RESPONSE_TIMEOUT);
+  free(command);
+  return err;
+}
+
+UBX_CELL_error_t UBX_CELL_VOICE::generateToneFreq(uint16_t frequency, uint16_t duration, uint8_t volume)
+{
+  UBX_CELL_error_t err;
+  char *command;
+  char response[] = "\r\nOK\r\n\r\n+UUTGN: 0\r\n";
+
+  command = ubx_cell_calloc_char(strlen(UBX_CELL_COMMAND_GENERATE_TONE) + 15);
+  if (command == nullptr)
+    return UBX_CELL_ERROR_OUT_OF_MEMORY;
+  sprintf(command, "%s=%d,%d,%d", UBX_CELL_COMMAND_GENERATE_TONE, frequency, duration, volume);
+
+  err = sendCommandWithResponse(command, response,
+                                nullptr, UBX_CELL_STANDARD_RESPONSE_TIMEOUT);
+  free(command);
+  return err;
+}
+
+UBX_CELL_error_t UBX_CELL_VOICE::generateToneDTMF(char dtmf_character, uint16_t duration, uint8_t volume)
+{
+  UBX_CELL_error_t err;
+  char *command;
+  char response[] = "\r\nOK\r\n\r\n+UUTGN: 0\r\n";
+
+  command = ubx_cell_calloc_char(strlen(UBX_CELL_COMMAND_GENERATE_TONE) + 14);
+  if (command == nullptr)
+    return UBX_CELL_ERROR_OUT_OF_MEMORY;
+  sprintf(command, "%s=\"%c\",%d,%d", UBX_CELL_COMMAND_GENERATE_TONE, dtmf_character, duration, volume);
+
+  err = sendCommandWithResponse(command, response,
+                                nullptr, UBX_CELL_STANDARD_RESPONSE_TIMEOUT);
+  free(command);
+  return err;
+}

src/sfe_ublox_cellular_voice.h

@@ -0,0 +1,26 @@
+#ifndef SPARKFUN_UBX_CELL_VOICE_ARDUINO_LIBRARY_H
+#define SPARKFUN_UBX_CELL_VOICE_ARDUINO_LIBRARY_H
+
+#include "sfe_ublox_cellular.h"
+
+const char UBX_CELL_COMMAND_DIAL[] = "D";              // Dial command
+const char UBX_CELL_COMMAND_ANSWER[] = "A";            // Answer call
+const char UBX_CELL_COMMAND_HANG_UP[] = "+CHUP";       // Hang up call
+const char UBX_CELL_COMMAND_PLAY_AUDIO[] = "+UPAR";    // Play audio resource
+const char UBX_CELL_COMMAND_STOP_AUDIO[] = "+USAR";    // Stop audio resource
+const char UBX_CELL_COMMAND_GENERATE_TONE[] = "+UTGN"; // Tone generator
+
+// Base class for any modules supporting voice calls
+class UBX_CELL_VOICE: virtual public UBX_CELL
+{
+public:
+  UBX_CELL_error_t dial(String number);
+  UBX_CELL_error_t answer(void);
+  UBX_CELL_error_t hangUp(void);
+  UBX_CELL_error_t playAudioResource(uint8_t audio_resource, uint8_t tone_id, uint8_t nof_repeat);
+  UBX_CELL_error_t stopAudioResource(uint8_t audio_resource);
+  UBX_CELL_error_t generateToneFreq(uint16_t frequency, uint16_t duration, uint8_t volume);
+  UBX_CELL_error_t generateToneDTMF(char dtmf_character, uint16_t duration, uint8_t volume);
+};
+
+#endif