arduino-audio-tools
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AudioLoRa.h
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1#pragma once
2
5#include "LoRa.h" // 👉 https://github.com/sandeepmistry/arduino-LoRa
6
7// define the default pins used by the transceiver module
8#define ss 8
9#define rst 12
10#define dio0 14
11
12namespace audio_tools {
13
31struct AudioLoRaConfig : public AudioInfo {
33 int max_size = 200;
34 int frequency = 868E6; // (433E6, 868E6, 915E6)
35 int sync_word = 0xF3;
36 int tx_power = 20; // 2-20;
37 int spreading_factor = 12; // 6-12
39 7.8E3; // 7.8E3, 10.4E3, 15.6E3, 20.8E3, 31.25E3, 41.7E3,
40 // 62.5E3, 125E3, 250E3, and 500E3.
41 int pin_ss = ss;
42 int pin_rst = rst;
44 bool process_audio_info = true;
45};
46
57class AudioLoRa : public AudioStream {
58 public:
63
70
71 bool begin(AudioLoRaConfig config) {
72 cfg = config;
74 return begin();
75 }
76
77 bool begin() {
78 TRACEI();
80 LoRa.setSignalBandwidth(cfg.signal_bandwidth);
81 LoRa.setSpreadingFactor(cfg.spreading_factor);
82 LoRa.setTxPower(cfg.tx_power);
83 LoRa.setSPIFrequency(cfg.spi_speed);
85 LoRa.setSyncWord(cfg.sync_word);
86 bool rc = LoRa.begin(cfg.frequency);
89 }
90 return rc;
91 }
92
93 void end() { LoRa.end(); }
94
95 size_t readBytes(uint8_t* data, size_t len) {
96 TRACEI();
97 size_t packetSize = LoRa.parsePacket();
98 if (cfg.process_audio_info && packetSize == sizeof(AudioInfo)) {
100 packetSize = LoRa.parsePacket();
101 }
102 int toRead = min(len, packetSize);
103 int read = LoRa.readBytes(data, toRead);
104 return read;
105 }
106
107 int available() { return cfg.max_size; }
108
110
111 size_t write(const uint8_t* data, size_t len) {
112 TRACEI();
113 for (int j = 0; j < len; j++) {
114 buffer.write(data[j]);
115 if (buffer.isFull()) {
116 LoRa.beginPacket();
117 LoRa.write(buffer.data(), buffer.available());
118 LoRa.endPacket();
119 buffer.clear();
120 }
121 }
122 return len;
123 }
124
125 protected:
128
130 AudioInfo tmp;
131 int read = LoRa.readBytes((uint8_t*)&tmp, sizeof(AudioInfo));
132 setAudioInfo(tmp);
133 }
134
136 LoRa.beginPacket();
138 LoRa.write((uint8_t*)&ai, sizeof(ai));
139 LoRa.endPacket();
140 }
141};
142
143} // namespace audio_tools
#define dio0
Definition AudioLoRa.h:10
#define ss
Definition AudioLoRa.h:8
#define rst
Definition AudioLoRa.h:9
#define TRACEI()
Definition AudioLoggerIDF.h:32
LoRa Audio Sending and Receiving.
Definition AudioLoRa.h:57
void readAudioInfo()
Definition AudioLoRa.h:129
bool begin(AudioLoRaConfig config)
Definition AudioLoRa.h:71
int available()
Definition AudioLoRa.h:107
void setAudioInfo(AudioInfo info)
Defines the input AudioInfo.
Definition AudioLoRa.h:64
bool begin()
Definition AudioLoRa.h:77
AudioLoRaConfig defaultConfig()
Definition AudioLoRa.h:59
void writeAudioInfo()
Definition AudioLoRa.h:135
int availableForWrite()
Definition AudioLoRa.h:109
size_t readBytes(uint8_t *data, size_t len)
Definition AudioLoRa.h:95
SingleBuffer< uint8_t > buffer
Definition AudioLoRa.h:127
void end()
Definition AudioLoRa.h:93
AudioLoRaConfig cfg
Definition AudioLoRa.h:126
size_t write(const uint8_t *data, size_t len)
Definition AudioLoRa.h:111
Base class for all Audio Streams. It support the boolean operator to test if the object is ready with...
Definition BaseStream.h:120
AudioInfo info
Definition BaseStream.h:171
virtual void setAudioInfo(AudioInfo newInfo) override
Defines the input AudioInfo.
Definition BaseStream.h:128
virtual AudioInfo audioInfo() override
provides the actual input AudioInfo
Definition BaseStream.h:151
void clear()
same as reset
Definition Buffers.h:96
A simple Buffer implementation which just uses a (dynamically sized) array.
Definition Buffers.h:184
bool write(T sample) override
write add an entry to the buffer
Definition Buffers.h:218
int available() override
provides the number of entries that are available to read
Definition Buffers.h:245
bool isFull() override
checks if the buffer is full
Definition Buffers.h:252
T * data()
Provides address of actual data.
Definition Buffers.h:296
bool resize(size_t size)
Resizes the buffer if supported: returns false if not supported.
Definition Buffers.h:317
Generic Implementation of sound input and output for desktop environments using portaudio.
Definition AudioCodecsBase.h:10
size_t writeData(Print *p_out, T *data, int samples, int maxSamples=512)
Definition AudioTypes.h:508
Basic Audio information which drives e.g. I2S.
Definition AudioTypes.h:51
sample_rate_t sample_rate
Sample Rate: e.g 44100.
Definition AudioTypes.h:53
uint16_t channels
Number of channels: 2=stereo, 1=mono.
Definition AudioTypes.h:55
uint8_t bits_per_sample
Number of bits per sample (int16_t = 16 bits)
Definition AudioTypes.h:57
LoRa Audio Configuration with default values maximised for speed.
Definition AudioLoRa.h:31
int frequency
Definition AudioLoRa.h:34
int pin_rst
Definition AudioLoRa.h:42
int tx_power
Definition AudioLoRa.h:36
int signal_bandwidth
Definition AudioLoRa.h:38
int spreading_factor
Definition AudioLoRa.h:37
int32_t spi_speed
Definition AudioLoRa.h:32
int pin_ss
Definition AudioLoRa.h:41
int max_size
Definition AudioLoRa.h:33
int pin_dio0
Definition AudioLoRa.h:43
int sync_word
Definition AudioLoRa.h:35
bool process_audio_info
Definition AudioLoRa.h:44