acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
FSK4_Transmit_AFSK.ino (3366B)
      1 /*
      2    RadioLib FSK4 Transmit AFSK Example
      3 
      4    This example sends an example FSK-4 'Horus Binary' message 
      5    using SX1278's FSK modem. The data is modulated as AFSK.
      6 
      7    This signal can be demodulated using an FM demodulator (SDR or otherwise),
      8    and horusdemodlib: https://github.com/projecthorus/horusdemodlib/wiki
      9 
     10    Other modules that can be used for FSK4:
     11     - SX127x/RFM9x
     12     - RF69
     13     - SX1231
     14     - CC1101
     15     - Si443x/RFM2x
     16 
     17    For default module settings, see the wiki page
     18    https://github.com/jgromes/RadioLib/wiki/Default-configuration
     19 
     20    For full API reference, see the GitHub Pages
     21    https://jgromes.github.io/RadioLib/
     22 */
     23 
     24 // include the library
     25 #include <RadioLib.h>
     26 
     27 // SX1278 has the following connections:
     28 // NSS pin:   10
     29 // DIO0 pin:  2
     30 // RESET pin: 9
     31 // DIO1 pin:  3
     32 SX1278 radio = new Module(10, 2, 9, 3);
     33 
     34 // or using RadioShield
     35 // https://github.com/jgromes/RadioShield
     36 //SX1278 radio = RadioShield.ModuleA;
     37 
     38 // create AFSK client instance using the FSK module
     39 // pin 5 is connected to SX1278 DIO2
     40 AFSKClient audio(&radio, 5);
     41 
     42 // create FSK4 client instance using the AFSK instance
     43 FSK4Client fsk4(&audio);
     44 
     45 // An encoded Horus Binary telemetry packet.
     46 // Refer here for packet format information:
     47 // https://github.com/projecthorus/horusdemodlib/wiki/2---Modem-Details#horus-binary-v1-mode-4-fsk
     48 // After demodulation, deinterleaving, and descrambling, this results in a packet:
     49 // 00000001172D0000000000000000D20463010AFF2780
     50 // This decodes to the Habitat-compatible telemetry string:
     51 // $$4FSKTEST,0,01:23:45,0.00000,0.00000,1234,99,1,10,5.00*ABCD
     52 int horusPacketLen = 45;
     53 byte horusPacket[] = {
     54   0x45, 0x24, 0x24, 0x48, 0x2F, 0x12, 0x16, 0x08, 0x15, 0xC1,
     55   0x49, 0xB2, 0x06, 0xFC, 0x92, 0xEB, 0x93, 0xD7, 0xEE, 0x5D,
     56   0x35, 0xA0, 0x91, 0xDA, 0x8D, 0x5F, 0x85, 0x6B, 0x63, 0x03,
     57   0x6B, 0x60, 0xEA, 0xFE, 0x55, 0x9D, 0xF1, 0xAB, 0xE5, 0x5E,
     58   0xDB, 0x7C, 0xDB, 0x21, 0x5A, 0x19
     59 };
     60 
     61 void setup() {
     62   Serial.begin(9600);
     63 
     64   // initialize SX1278 with default settings
     65   Serial.print(F("[SX1278] Initializing ... "));
     66   int state = radio.beginFSK();
     67 
     68   // when using one of the non-LoRa modules for RTTY
     69   // (RF69, CC1101, Si4432 etc.), use the basic begin() method
     70   // int state = radio.begin();
     71 
     72   if(state == RADIOLIB_ERR_NONE) {
     73     Serial.println(F("success!"));
     74   } else {
     75     Serial.print(F("failed, code "));
     76     Serial.println(state);
     77     while(true);
     78   }
     79 
     80   // initialize FSK4 client
     81   // NOTE: Unlike FSK FSK4, AFSK requires no rounding of
     82   //       the frequency shift.
     83   Serial.print(F("[FSK4] Initializing ... "));
     84   // low ("space") frequency:     434.0 MHz
     85   // frequency shift:             270 Hz
     86   // baud rate:                   100 baud
     87   state = fsk4.begin(400, 270, 100);
     88   if(state == RADIOLIB_ERR_NONE) {
     89     Serial.println(F("success!"));
     90   } else {
     91     Serial.print(F("failed, code "));
     92     Serial.println(state);
     93     while(true);
     94   }
     95 }
     96 
     97 void loop() {
     98   Serial.print(F("[FSK4] Sending FSK4 data packet ... "));
     99 
    100   // send out idle condition for 500 ms
    101   fsk4.idle();
    102   delay(1000);
    103 
    104   // FSK4Client supports binary write methods
    105 
    106   // send some bytes as a preamble
    107   for(int i = 0; i < 8; i++) {
    108     fsk4.write(0x1B);
    109   }
    110 
    111   // now send the encoded packet
    112   fsk4.write(horusPacket, horusPacketLen);
    113 
    114   Serial.println(F("done!"));
    115 
    116   // wait for a second before transmitting again
    117   delay(1000);
    118 }