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[FSK4] Example formatting update

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jgromes 2021-09-24 09:19:37 +02:00
parent b46d9f8e59
commit 20b0f11ee6
1 changed files with 29 additions and 26 deletions
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53
examples/FSK4/FSK4_Transmit/FSK4_Transmit.ino
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@ -1,14 +1,13 @@
/* /*
RadioLib FSK4 Transmit Example RadioLib FSK4 Transmit Example
This example sends an example FSK-4 'Horus Binary' message using SX1278's This example sends an example FSK-4 'Horus Binary' message
FSK modem. using SX1278's FSK modem.
This signal can be demodulated using a SSB demodulator (SDR or otherwise), and This signal can be demodulated using a SSB demodulator (SDR or otherwise),
horusdemodlib: https://github.com/projecthorus/horusdemodlib/wiki and horusdemodlib: https://github.com/projecthorus/horusdemodlib/wiki
Other modules that can be used for FSK4: Other modules that can be used for FSK4:
(Untested, but work with RTTY to are likely to work here too)
- SX127x/RFM9x - SX127x/RFM9x
- RF69 - RF69
- SX1231 - SX1231
@ -39,22 +38,24 @@ SX1278 radio = new Module(10, 2, 9, 3);
// https://github.com/jgromes/RadioShield // https://github.com/jgromes/RadioShield
//SX1278 radio = RadioShield.ModuleA; //SX1278 radio = RadioShield.ModuleA;
// create FAK4 client instance using the FSK module // create FSK4 client instance using the FSK module
FSK4Client fsk4(&radio); FSK4Client fsk4(&radio);
// A 'canned' encoded Horus Binary telemetry packet. // An encoded Horus Binary telemetry packet.
// Refer here for packet format information: // Refer here for packet format information:
// https://github.com/projecthorus/horusdemodlib/wiki/2---Modem-Details#horus-binary-v1-mode-4-fsk // https://github.com/projecthorus/horusdemodlib/wiki/2---Modem-Details#horus-binary-v1-mode-4-fsk
// After demodulation, deinterleaving, and descrambling, this results in a packet: 00000001172D0000000000000000D20463010AFF2780 // After demodulation, deinterleaving, and descrambling, this results in a packet:
// This decodes to the Habitat-compatible telemetry string: $$4FSKTEST,0,01:23:45,0.00000,0.00000,1234,99,1,10,5.00*ABCD // 00000001172D0000000000000000D20463010AFF2780
uint8_t sample_packet[] = { // This decodes to the Habitat-compatible telemetry string:
0x45, 0x24, 0x24, 0x48, 0x2F, 0x12, 0x16, 0x08, 0x15, 0xC1, // $$4FSKTEST,0,01:23:45,0.00000,0.00000,1234,99,1,10,5.00*ABCD
0x49, 0xB2, 0x06, 0xFC, 0x92, 0xEB, 0x93, 0xD7, 0xEE, 0x5D, int horusPacketLen = 45;
0x35, 0xA0, 0x91, 0xDA, 0x8D, 0x5F, 0x85, 0x6B, 0x63, 0x03, byte horusPacket[] = {
0x6B, 0x60, 0xEA, 0xFE, 0x55, 0x9D, 0xF1, 0xAB, 0xE5, 0x5E, 0x45, 0x24, 0x24, 0x48, 0x2F, 0x12, 0x16, 0x08, 0x15, 0xC1,
0xDB, 0x7C, 0xDB, 0x21, 0x5A, 0x19 0x49, 0xB2, 0x06, 0xFC, 0x92, 0xEB, 0x93, 0xD7, 0xEE, 0x5D,
0x35, 0xA0, 0x91, 0xDA, 0x8D, 0x5F, 0x85, 0x6B, 0x63, 0x03,
0x6B, 0x60, 0xEA, 0xFE, 0x55, 0x9D, 0xF1, 0xAB, 0xE5, 0x5E,
0xDB, 0x7C, 0xDB, 0x21, 0x5A, 0x19
}; };
uint8_t sample_packet_len = 45;
void setup() { void setup() {
Serial.begin(9600); Serial.begin(9600);
@ -88,7 +89,7 @@ void setup() {
// SX128x - 198 Hz // SX128x - 198 Hz
Serial.print(F("[FSK4] Initializing ... ")); Serial.print(F("[FSK4] Initializing ... "));
// low ("space") frequency: 434.0 MHz // low ("space") frequency: 434.0 MHz
// frequency shift: 270 Hz (actually results in a shift of 244 Hz) // frequency shift: 270 Hz
// baud rate: 100 baud // baud rate: 100 baud
state = fsk4.begin(434.0, 270, 100); state = fsk4.begin(434.0, 270, 100);
if(state == ERR_NONE) { if(state == ERR_NONE) {
@ -98,7 +99,6 @@ void setup() {
Serial.println(state); Serial.println(state);
while(true); while(true);
} }
} }
void loop() { void loop() {
@ -108,15 +108,18 @@ void loop() {
fsk4.idle(); fsk4.idle();
delay(1000); delay(1000);
// FSK4Client supports the write(uint8_t b) and write(uint8_t* buff, size_t len) method. // FSK4Client supports binary write methods
// We use the write(uint8_t b) method to send a few bytes of preamble to allow the demodulator
// to lock on to the signal.
fsk4.write(0x1B); fsk4.write(0x1B); fsk4.write(0x1B); fsk4.write(0x1B);
fsk4.write(0x1B); fsk4.write(0x1B); fsk4.write(0x1B); fsk4.write(0x1B);
// We then send the encoded packet. // send some bytes as a preamble
fsk4.write(sample_packet, sample_packet_len); for(int i = 0; i < 8; i++) {
fsk4.write(0x1B);
}
// now send the encoded packet
fsk4.write(horusPacket, horusPacketLen);
Serial.println(F("done!")); Serial.println(F("done!"));
// wait for a second before transmitting again
delay(1000);
} }