/*
   RadioLib SSTV Transmit Example

   The following example sends SSTV picture using
   SX1278's FSK modem.

   Other modules that can be used for SSTV:
    - SX127x/RFM9x
    - RF69
    - SX1231
    - SX126x

   NOTE: SSTV is an analog modulation, and
         requires precise frequency control.
         Some of the above modules can only
         set their frequency in rough steps,
         so the result can be distorted.
         Using high-precision radio with TCXO
         (like SX126x) is recommended.

   NOTE: Some platforms (such as Arduino Uno)
         might not be fast enough to correctly
         send pictures via high-speed modes
         like Scottie2 or Martin2. For those,
         lower speed modes such as Wrasse,
         Scottie1 or Martin1 are recommended.

   For default module settings, see the wiki page
   https://github.com/jgromes/RadioLib/wiki/Default-configuration

   For full API reference, see the GitHub Pages
   https://jgromes.github.io/RadioLib/
*/

// include the library
#include <RadioLib.h>

// SX1278 has the following connections:
// NSS pin:   10
// DIO0 pin:  2
// RESET pin: 9
// DIO1 pin:  3
SX1278 radio = new Module(10, 2, 9, 3);

// or using RadioShield
// https://github.com/jgromes/RadioShield
//SX1278 radio = RadioShield.ModuleA;

// create SSTV client instance using the FSK module
SSTVClient sstv(&radio);

// test "image" - actually just a single 320px line
// will be sent over and over again, to create vertical color stripes at the receiver
uint32_t line[320] = {
  // black
  0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,
  0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000, 0x000000,

  // blue
  0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF,
  0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF, 0x0000FF,

  // green
  0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00,
  0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00, 0x00FF00,

  // cyan
  0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF,
  0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF, 0x00FFFF,

  // red
  0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000,
  0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000, 0xFF0000,

  // magenta
  0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF,
  0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF, 0xFF00FF,

  // yellow
  0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00,
  0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00, 0xFFFF00,

  // white
  0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF,
  0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF, 0xFFFFFF
};

void setup() {
  Serial.begin(9600);

  // initialize SX1278 with default settings
  Serial.print(F("[SX1278] Initializing ... "));
  int state = radio.beginFSK();
  if (state == RADIOLIB_ERR_NONE) {
    Serial.println(F("success!"));
  } else {
    Serial.print(F("failed, code "));
    Serial.println(state);
    while (true);
  }

  // when using one of the non-LoRa modules for SSTV
  // (RF69, SX1231 etc.), use the basic begin() method
  // int state = radio.begin();

  // initialize SSTV client
  Serial.print(F("[SSTV] Initializing ... "));
  // 0 Hz tone frequency:         434.0 MHz
  // SSTV mode:                   Wrasse (SC2-180)
  // correction factor:           0.95
  // NOTE: Due to different speeds of various platforms
  //       supported by RadioLib (Arduino Uno, ESP32 etc),
  //       and because SSTV is analog protocol, incorrect
  //       timing of pulses can lead to distortions.
  //       To compensate, correction factor can be used
  //       to adjust the length of timing pulses
  //       (lower number = shorter pulses).
  //       The value is usually around 0.95 (95%).
  state = sstv.begin(434.0, Wrasse, 0.95);
  if(state == RADIOLIB_ERR_NONE) {
    Serial.println(F("success!"));
  } else {
    Serial.print(F("failed, code "));
    Serial.println(state);
    while(true);
  }

  // to help tune the receiver, SSTVClient can send
  // continuous beep at the frequency corresponding to
  // 1900 Hz in upper sideband (aka USB) modulation
  // (SSTV header "leader tone")
  /*
    sstv.idle();
    while(true);
  */
}

void loop() {
  // send picture with 8 color stripes
  Serial.print(F("[SSTV] Sending test picture ... "));

  // send synchronization header first
  sstv.sendHeader();

  // send all picture lines
  for(uint16_t i = 0; i < sstv.getPictureHeight(); i++) {
    sstv.sendLine(line);
  }

  // turn off transmitter
  radio.standby();

  Serial.println(F("done!"));

  delay(30000);
}
