--- /dev/null
+.DS_Store
+*.hex
+TODO
+
--- /dev/null
+#ifndef CONFIG_H
+ #define CONFIG_H
+
+ #define MCU_328P 0x90
+ #define MCU_1284P 0x91
+
+ #if defined(__AVR_ATmega328P__)
+ #define MCU_VARIANT MCU_328P
+ #warning "Firmware is being compiled for atmega328p based boards"
+ #elif defined(__AVR_ATmega1284P__)
+ #define MCU_VARIANT MCU_1284P
+ #warning "Firmware is being compiled for atmega1284p based boards"
+ #else
+ #error "The firmware cannot be compiled for the selected MCU variant"
+ #endif
+
+ #define MTU 500
+ #define SINGLE_MTU 255
+ #define HEADER_L 1
+ #define CMD_L 4
+
+ // MCU dependent configuration parameters
+ #if MCU_VARIANT == MCU_328P
+ const int pin_cs = 7;
+ const int pin_reset = 6;
+ const int pin_dio = 2;
+ const int pin_led_rx = 5;
+ const int pin_led_tx = 4;
+ #endif
+
+ #if MCU_VARIANT == MCU_1284P
+ const int pin_cs = 4;
+ const int pin_reset = 3;
+ const int pin_dio = 2;
+ const int pin_led_rx = 12;
+ const int pin_led_tx = 13;
+ #endif
+
+ // MCU independent configuration parameters
+ const long serial_baudrate = 115200;
+ const int rssi_offset = 164;
+
+ // Default LoRa settings
+ int lora_sf = 0;
+ int lora_txp = 0xFF;
+ uint32_t lora_bw = 0;
+ uint32_t lora_freq = 0;
+
+ // Operational variables
+ bool radio_locked = true;
+ bool radio_online = false;
+
+ int last_rssi = -164;
+ size_t read_len = 0;
+ uint8_t seq = 0xFF;
+ uint8_t pbuf[MTU];
+ uint8_t sbuf[MTU];
+ uint8_t cbuf[CMD_L];
+
+ uint32_t stat_rx = 0;
+ uint32_t stat_tx = 0;
+
+#endif
\ No newline at end of file
--- /dev/null
+#ifndef FRAMING_H
+ #define FRAMING_H
+
+ #define FEND 0xC0
+ #define FESC 0xDB
+ #define TFEND 0xDC
+ #define TFESC 0xDD
+
+ #define CMD_UNKNOWN 0xFE
+ #define CMD_DATA 0x00
+ #define CMD_FREQUENCY 0x01
+ #define CMD_BANDWIDTH 0x02
+ #define CMD_TXPOWER 0x03
+ #define CMD_SF 0x04
+ #define CMD_RADIO_STATE 0x05
+ #define CMD_RADIO_LOCK 0x06
+
+ #define CMD_STAT_RX 0x21
+ #define CMD_STAT_TX 0x22
+ #define CMD_STAT_RSSI 0x23
+ #define CMD_BLINK 0x30
+ #define CMD_RANDOM 0x40
+
+ #define RADIO_STATE_OFF 0x00
+ #define RADIO_STATE_ON 0x01
+
+ #define CMD_ERROR 0x90
+ #define ERROR_INITRADIO 0x01
+ #define ERROR_TXFAILED 0x02
+
+ #define NIBBLE_SEQ 0xF0
+ #define NIBBLE_FLAGS 0x0F
+ #define FLAG_SPLIT 0x01
+ #define SEQ_UNSET 0xFF
+
+ // Serial framing variables
+ size_t frame_len;
+ bool IN_FRAME = false;
+ bool ESCAPE = false;
+ uint8_t command = CMD_UNKNOWN;
+
+#endif
+
+/*
+Frequency 433.200 0xc00119d21b80c0
+Bandwidth 20.800 0xc00200005140c0
+TX Power 8dbm 0xc00308c0
+SF 7 0xc00407c0
+
+All: 0xc00119d21b80c00200005140c00308c00407c0
+
+Radio on 0xc00501c0
+
+Config+on 0xc00119d21b80c00200005140c00308c00407c00501c0
+*/
\ No newline at end of file
--- /dev/null
+// Copyright (c) Sandeep Mistry. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#include <LoRa.h>
+
+// registers
+#define REG_FIFO 0x00
+#define REG_OP_MODE 0x01
+#define REG_FRF_MSB 0x06
+#define REG_FRF_MID 0x07
+#define REG_FRF_LSB 0x08
+#define REG_PA_CONFIG 0x09
+#define REG_LNA 0x0c
+#define REG_FIFO_ADDR_PTR 0x0d
+#define REG_FIFO_TX_BASE_ADDR 0x0e
+#define REG_FIFO_RX_BASE_ADDR 0x0f
+#define REG_FIFO_RX_CURRENT_ADDR 0x10
+#define REG_IRQ_FLAGS 0x12
+#define REG_RX_NB_BYTES 0x13
+#define REG_PKT_SNR_VALUE 0x19
+#define REG_PKT_RSSI_VALUE 0x1a
+#define REG_MODEM_CONFIG_1 0x1d
+#define REG_MODEM_CONFIG_2 0x1e
+#define REG_PREAMBLE_MSB 0x20
+#define REG_PREAMBLE_LSB 0x21
+#define REG_PAYLOAD_LENGTH 0x22
+#define REG_MODEM_CONFIG_3 0x26
+#define REG_FREQ_ERROR_MSB 0x28
+#define REG_FREQ_ERROR_MID 0x29
+#define REG_FREQ_ERROR_LSB 0x2a
+#define REG_RSSI_WIDEBAND 0x2c
+#define REG_DETECTION_OPTIMIZE 0x31
+#define REG_DETECTION_THRESHOLD 0x37
+#define REG_SYNC_WORD 0x39
+#define REG_DIO_MAPPING_1 0x40
+#define REG_VERSION 0x42
+
+// modes
+#define MODE_LONG_RANGE_MODE 0x80
+#define MODE_SLEEP 0x00
+#define MODE_STDBY 0x01
+#define MODE_TX 0x03
+#define MODE_RX_CONTINUOUS 0x05
+#define MODE_RX_SINGLE 0x06
+
+// PA config
+#define PA_BOOST 0x80
+
+// IRQ masks
+#define IRQ_TX_DONE_MASK 0x08
+#define IRQ_PAYLOAD_CRC_ERROR_MASK 0x20
+#define IRQ_RX_DONE_MASK 0x40
+
+#define MAX_PKT_LENGTH 255
+
+LoRaClass::LoRaClass() :
+ _spiSettings(8E6, MSBFIRST, SPI_MODE0),
+ _ss(LORA_DEFAULT_SS_PIN), _reset(LORA_DEFAULT_RESET_PIN), _dio0(LORA_DEFAULT_DIO0_PIN),
+ _frequency(0),
+ _packetIndex(0),
+ _implicitHeaderMode(0),
+ _onReceive(NULL)
+{
+ // overide Stream timeout value
+ setTimeout(0);
+}
+
+int LoRaClass::begin(long frequency)
+{
+ // setup pins
+ pinMode(_ss, OUTPUT);
+ // set SS high
+ digitalWrite(_ss, HIGH);
+
+ if (_reset != -1) {
+ pinMode(_reset, OUTPUT);
+
+ // perform reset
+ digitalWrite(_reset, LOW);
+ delay(10);
+ digitalWrite(_reset, HIGH);
+ delay(10);
+ }
+
+ // start SPI
+ SPI.begin();
+
+ // check version
+ uint8_t version = readRegister(REG_VERSION);
+ if (version != 0x12) {
+ return 0;
+ }
+
+ // put in sleep mode
+ sleep();
+
+ // set frequency
+ setFrequency(frequency);
+
+ // set base addresses
+ writeRegister(REG_FIFO_TX_BASE_ADDR, 0);
+ writeRegister(REG_FIFO_RX_BASE_ADDR, 0);
+
+ // set LNA boost
+ writeRegister(REG_LNA, readRegister(REG_LNA) | 0x03);
+
+ // set auto AGC
+ writeRegister(REG_MODEM_CONFIG_3, 0x04);
+
+ // set output power to 17 dBm
+ setTxPower(17);
+
+ // put in standby mode
+ idle();
+
+ return 1;
+}
+
+void LoRaClass::end()
+{
+ // put in sleep mode
+ sleep();
+
+ // stop SPI
+ SPI.end();
+}
+
+int LoRaClass::beginPacket(int implicitHeader)
+{
+ // put in standby mode
+ idle();
+
+ if (implicitHeader) {
+ implicitHeaderMode();
+ } else {
+ explicitHeaderMode();
+ }
+
+ // reset FIFO address and paload length
+ writeRegister(REG_FIFO_ADDR_PTR, 0);
+ writeRegister(REG_PAYLOAD_LENGTH, 0);
+
+ return 1;
+}
+
+int LoRaClass::endPacket()
+{
+ // put in TX mode
+ writeRegister(REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_TX);
+
+ // wait for TX done
+ while ((readRegister(REG_IRQ_FLAGS) & IRQ_TX_DONE_MASK) == 0) {
+ yield();
+ }
+
+ // clear IRQ's
+ writeRegister(REG_IRQ_FLAGS, IRQ_TX_DONE_MASK);
+
+ return 1;
+}
+
+int LoRaClass::parsePacket(int size)
+{
+ int packetLength = 0;
+ int irqFlags = readRegister(REG_IRQ_FLAGS);
+
+ if (size > 0) {
+ implicitHeaderMode();
+
+ writeRegister(REG_PAYLOAD_LENGTH, size & 0xff);
+ } else {
+ explicitHeaderMode();
+ }
+
+ // clear IRQ's
+ writeRegister(REG_IRQ_FLAGS, irqFlags);
+
+ if ((irqFlags & IRQ_RX_DONE_MASK) && (irqFlags & IRQ_PAYLOAD_CRC_ERROR_MASK) == 0) {
+ // received a packet
+ _packetIndex = 0;
+
+ // read packet length
+ if (_implicitHeaderMode) {
+ packetLength = readRegister(REG_PAYLOAD_LENGTH);
+ } else {
+ packetLength = readRegister(REG_RX_NB_BYTES);
+ }
+
+ // set FIFO address to current RX address
+ writeRegister(REG_FIFO_ADDR_PTR, readRegister(REG_FIFO_RX_CURRENT_ADDR));
+
+ // put in standby mode
+ idle();
+ } else if (readRegister(REG_OP_MODE) != (MODE_LONG_RANGE_MODE | MODE_RX_SINGLE)) {
+ // not currently in RX mode
+
+ // reset FIFO address
+ writeRegister(REG_FIFO_ADDR_PTR, 0);
+
+ // put in single RX mode
+ writeRegister(REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_RX_SINGLE);
+ }
+
+ return packetLength;
+}
+
+int LoRaClass::packetRssi()
+{
+ return (readRegister(REG_PKT_RSSI_VALUE) - (_frequency < 868E6 ? 164 : 157));
+}
+
+float LoRaClass::packetSnr()
+{
+ return ((int8_t)readRegister(REG_PKT_SNR_VALUE)) * 0.25;
+}
+
+long LoRaClass::packetFrequencyError()
+{
+ int32_t freqError = 0;
+ freqError = static_cast<int32_t>(readRegister(REG_FREQ_ERROR_MSB) & B111);
+ freqError <<= 8L;
+ freqError += static_cast<int32_t>(readRegister(REG_FREQ_ERROR_MID));
+ freqError <<= 8L;
+ freqError += static_cast<int32_t>(readRegister(REG_FREQ_ERROR_LSB));
+
+ if (readRegister(REG_FREQ_ERROR_MSB) & B1000) { // Sign bit is on
+ freqError -= 524288; // B1000'0000'0000'0000'0000
+ }
+
+ const float fXtal = 32E6; // FXOSC: crystal oscillator (XTAL) frequency (2.5. Chip Specification, p. 14)
+ const float fError = ((static_cast<float>(freqError) * (1L << 24)) / fXtal) * (getSignalBandwidth() / 500000.0f); // p. 37
+
+ return static_cast<long>(fError);
+}
+
+size_t LoRaClass::write(uint8_t byte)
+{
+ return write(&byte, sizeof(byte));
+}
+
+size_t LoRaClass::write(const uint8_t *buffer, size_t size)
+{
+ int currentLength = readRegister(REG_PAYLOAD_LENGTH);
+
+ // check size
+ if ((currentLength + size) > MAX_PKT_LENGTH) {
+ size = MAX_PKT_LENGTH - currentLength;
+ }
+
+ // write data
+ for (size_t i = 0; i < size; i++) {
+ writeRegister(REG_FIFO, buffer[i]);
+ }
+
+ // update length
+ writeRegister(REG_PAYLOAD_LENGTH, currentLength + size);
+
+ return size;
+}
+
+int LoRaClass::available()
+{
+ return (readRegister(REG_RX_NB_BYTES) - _packetIndex);
+}
+
+int LoRaClass::read()
+{
+ if (!available()) {
+ return -1;
+ }
+
+ _packetIndex++;
+
+ return readRegister(REG_FIFO);
+}
+
+int LoRaClass::peek()
+{
+ if (!available()) {
+ return -1;
+ }
+
+ // store current FIFO address
+ int currentAddress = readRegister(REG_FIFO_ADDR_PTR);
+
+ // read
+ uint8_t b = readRegister(REG_FIFO);
+
+ // restore FIFO address
+ writeRegister(REG_FIFO_ADDR_PTR, currentAddress);
+
+ return b;
+}
+
+void LoRaClass::flush()
+{
+}
+
+void LoRaClass::onReceive(void(*callback)(int))
+{
+ _onReceive = callback;
+
+ if (callback) {
+ pinMode(_dio0, INPUT);
+
+ writeRegister(REG_DIO_MAPPING_1, 0x00);
+#ifdef SPI_HAS_NOTUSINGINTERRUPT
+ SPI.usingInterrupt(digitalPinToInterrupt(_dio0));
+#endif
+ attachInterrupt(digitalPinToInterrupt(_dio0), LoRaClass::onDio0Rise, RISING);
+ } else {
+ detachInterrupt(digitalPinToInterrupt(_dio0));
+#ifdef SPI_HAS_NOTUSINGINTERRUPT
+ SPI.notUsingInterrupt(digitalPinToInterrupt(_dio0));
+#endif
+ }
+}
+
+void LoRaClass::receive(int size)
+{
+ if (size > 0) {
+ implicitHeaderMode();
+
+ writeRegister(REG_PAYLOAD_LENGTH, size & 0xff);
+ } else {
+ explicitHeaderMode();
+ }
+
+ writeRegister(REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_RX_CONTINUOUS);
+}
+
+void LoRaClass::idle()
+{
+ writeRegister(REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_STDBY);
+}
+
+void LoRaClass::sleep()
+{
+ writeRegister(REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_SLEEP);
+}
+
+void LoRaClass::setTxPower(int level, int outputPin)
+{
+ if (PA_OUTPUT_RFO_PIN == outputPin) {
+ // RFO
+ if (level < 0) {
+ level = 0;
+ } else if (level > 14) {
+ level = 14;
+ }
+
+ writeRegister(REG_PA_CONFIG, 0x70 | level);
+ } else {
+ // PA BOOST
+ if (level < 2) {
+ level = 2;
+ } else if (level > 17) {
+ level = 17;
+ }
+
+ writeRegister(REG_PA_CONFIG, PA_BOOST | (level - 2));
+ }
+}
+
+void LoRaClass::setFrequency(long frequency)
+{
+ _frequency = frequency;
+
+ uint64_t frf = ((uint64_t)frequency << 19) / 32000000;
+
+ writeRegister(REG_FRF_MSB, (uint8_t)(frf >> 16));
+ writeRegister(REG_FRF_MID, (uint8_t)(frf >> 8));
+ writeRegister(REG_FRF_LSB, (uint8_t)(frf >> 0));
+}
+
+long LoRaClass::getFrequency() {
+ uint8_t msb = readRegister(REG_FRF_MSB);
+ uint8_t mid = readRegister(REG_FRF_MID);
+ uint8_t lsb = readRegister(REG_FRF_LSB);
+
+ uint64_t frf = msb << 16 | mid << 8 | lsb;
+ long frequency = (uint64_t)(frf*32000000) >> 19;
+
+ return frequency;
+}
+
+void LoRaClass::setSpreadingFactor(int sf)
+{
+ if (sf < 6) {
+ sf = 6;
+ } else if (sf > 12) {
+ sf = 12;
+ }
+
+ if (sf == 6) {
+ writeRegister(REG_DETECTION_OPTIMIZE, 0xc5);
+ writeRegister(REG_DETECTION_THRESHOLD, 0x0c);
+ } else {
+ writeRegister(REG_DETECTION_OPTIMIZE, 0xc3);
+ writeRegister(REG_DETECTION_THRESHOLD, 0x0a);
+ }
+
+ writeRegister(REG_MODEM_CONFIG_2, (readRegister(REG_MODEM_CONFIG_2) & 0x0f) | ((sf << 4) & 0xf0));
+}
+
+long LoRaClass::getSignalBandwidth()
+{
+ byte bw = (readRegister(REG_MODEM_CONFIG_1) >> 4);
+ switch (bw) {
+ case 0: return 7.8E3;
+ case 1: return 10.4E3;
+ case 2: return 15.6E3;
+ case 3: return 20.8E3;
+ case 4: return 31.25E3;
+ case 5: return 41.7E3;
+ case 6: return 62.5E3;
+ case 7: return 125E3;
+ case 8: return 250E3;
+ case 9: return 500E3;
+ }
+}
+
+void LoRaClass::setSignalBandwidth(long sbw)
+{
+ int bw;
+
+ if (sbw <= 7.8E3) {
+ bw = 0;
+ } else if (sbw <= 10.4E3) {
+ bw = 1;
+ } else if (sbw <= 15.6E3) {
+ bw = 2;
+ } else if (sbw <= 20.8E3) {
+ bw = 3;
+ } else if (sbw <= 31.25E3) {
+ bw = 4;
+ } else if (sbw <= 41.7E3) {
+ bw = 5;
+ } else if (sbw <= 62.5E3) {
+ bw = 6;
+ } else if (sbw <= 125E3) {
+ bw = 7;
+ } else if (sbw <= 250E3) {
+ bw = 8;
+ } else /*if (sbw <= 250E3)*/ {
+ bw = 9;
+ }
+
+ writeRegister(REG_MODEM_CONFIG_1, (readRegister(REG_MODEM_CONFIG_1) & 0x0f) | (bw << 4));
+}
+
+void LoRaClass::setCodingRate4(int denominator)
+{
+ if (denominator < 5) {
+ denominator = 5;
+ } else if (denominator > 8) {
+ denominator = 8;
+ }
+
+ int cr = denominator - 4;
+
+ writeRegister(REG_MODEM_CONFIG_1, (readRegister(REG_MODEM_CONFIG_1) & 0xf1) | (cr << 1));
+}
+
+void LoRaClass::setPreambleLength(long length)
+{
+ writeRegister(REG_PREAMBLE_MSB, (uint8_t)(length >> 8));
+ writeRegister(REG_PREAMBLE_LSB, (uint8_t)(length >> 0));
+}
+
+void LoRaClass::setSyncWord(int sw)
+{
+ writeRegister(REG_SYNC_WORD, sw);
+}
+
+void LoRaClass::enableCrc()
+{
+ writeRegister(REG_MODEM_CONFIG_2, readRegister(REG_MODEM_CONFIG_2) | 0x04);
+}
+
+void LoRaClass::disableCrc()
+{
+ writeRegister(REG_MODEM_CONFIG_2, readRegister(REG_MODEM_CONFIG_2) & 0xfb);
+}
+
+byte LoRaClass::random()
+{
+ return readRegister(REG_RSSI_WIDEBAND);
+}
+
+void LoRaClass::setPins(int ss, int reset, int dio0)
+{
+ _ss = ss;
+ _reset = reset;
+ _dio0 = dio0;
+}
+
+void LoRaClass::setSPIFrequency(uint32_t frequency)
+{
+ _spiSettings = SPISettings(frequency, MSBFIRST, SPI_MODE0);
+}
+
+void LoRaClass::dumpRegisters(Stream& out)
+{
+ for (int i = 0; i < 128; i++) {
+ out.print("0x");
+ out.print(i, HEX);
+ out.print(": 0x");
+ out.println(readRegister(i), HEX);
+ }
+}
+
+void LoRaClass::explicitHeaderMode()
+{
+ _implicitHeaderMode = 0;
+
+ writeRegister(REG_MODEM_CONFIG_1, readRegister(REG_MODEM_CONFIG_1) & 0xfe);
+}
+
+void LoRaClass::implicitHeaderMode()
+{
+ _implicitHeaderMode = 1;
+
+ writeRegister(REG_MODEM_CONFIG_1, readRegister(REG_MODEM_CONFIG_1) | 0x01);
+}
+
+void LoRaClass::handleDio0Rise()
+{
+ int irqFlags = readRegister(REG_IRQ_FLAGS);
+
+ // clear IRQ's
+ writeRegister(REG_IRQ_FLAGS, irqFlags);
+
+ if ((irqFlags & IRQ_PAYLOAD_CRC_ERROR_MASK) == 0) {
+ // received a packet
+ _packetIndex = 0;
+
+ // read packet length
+ int packetLength = _implicitHeaderMode ? readRegister(REG_PAYLOAD_LENGTH) : readRegister(REG_RX_NB_BYTES);
+
+ // set FIFO address to current RX address
+ writeRegister(REG_FIFO_ADDR_PTR, readRegister(REG_FIFO_RX_CURRENT_ADDR));
+
+ if (_onReceive) {
+ _onReceive(packetLength);
+ }
+
+ // reset FIFO address
+ writeRegister(REG_FIFO_ADDR_PTR, 0);
+ }
+}
+
+uint8_t LoRaClass::readRegister(uint8_t address)
+{
+ return singleTransfer(address & 0x7f, 0x00);
+}
+
+void LoRaClass::writeRegister(uint8_t address, uint8_t value)
+{
+ singleTransfer(address | 0x80, value);
+}
+
+uint8_t LoRaClass::singleTransfer(uint8_t address, uint8_t value)
+{
+ uint8_t response;
+
+ digitalWrite(_ss, LOW);
+
+ SPI.beginTransaction(_spiSettings);
+ SPI.transfer(address);
+ response = SPI.transfer(value);
+ SPI.endTransaction();
+
+ digitalWrite(_ss, HIGH);
+
+ return response;
+}
+
+void LoRaClass::onDio0Rise()
+{
+ LoRa.handleDio0Rise();
+}
+
+LoRaClass LoRa;
\ No newline at end of file
--- /dev/null
+// Copyright (c) Sandeep Mistry. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+#ifndef LORA_H
+#define LORA_H
+
+#include <Arduino.h>
+#include <SPI.h>
+
+#define LORA_DEFAULT_SS_PIN 10
+#define LORA_DEFAULT_RESET_PIN 9
+#define LORA_DEFAULT_DIO0_PIN 2
+
+#define PA_OUTPUT_RFO_PIN 0
+#define PA_OUTPUT_PA_BOOST_PIN 1
+
+class LoRaClass : public Stream {
+public:
+ LoRaClass();
+
+ int begin(long frequency);
+ void end();
+
+ int beginPacket(int implicitHeader = false);
+ int endPacket();
+
+ int parsePacket(int size = 0);
+ int packetRssi();
+ float packetSnr();
+ long packetFrequencyError();
+
+ // from Print
+ virtual size_t write(uint8_t byte);
+ virtual size_t write(const uint8_t *buffer, size_t size);
+
+ // from Stream
+ virtual int available();
+ virtual int read();
+ virtual int peek();
+ virtual void flush();
+
+ void onReceive(void(*callback)(int));
+
+ void receive(int size = 0);
+ void idle();
+ void sleep();
+
+ void setTxPower(int level, int outputPin = PA_OUTPUT_PA_BOOST_PIN);
+ long getFrequency();
+ void setFrequency(long frequency);
+ void setSpreadingFactor(int sf);
+ long getSignalBandwidth();
+ void setSignalBandwidth(long sbw);
+ void setCodingRate4(int denominator);
+ void setPreambleLength(long length);
+ void setSyncWord(int sw);
+ void enableCrc();
+ void disableCrc();
+
+ // deprecated
+ void crc() { enableCrc(); }
+ void noCrc() { disableCrc(); }
+
+ byte random();
+
+ void setPins(int ss = LORA_DEFAULT_SS_PIN, int reset = LORA_DEFAULT_RESET_PIN, int dio0 = LORA_DEFAULT_DIO0_PIN);
+ void setSPIFrequency(uint32_t frequency);
+
+ void dumpRegisters(Stream& out);
+
+private:
+ void explicitHeaderMode();
+ void implicitHeaderMode();
+
+ void handleDio0Rise();
+
+ uint8_t readRegister(uint8_t address);
+ void writeRegister(uint8_t address, uint8_t value);
+ uint8_t singleTransfer(uint8_t address, uint8_t value);
+
+ static void onDio0Rise();
+
+private:
+ SPISettings _spiSettings;
+ int _ss;
+ int _reset;
+ int _dio0;
+ long _frequency;
+ int _packetIndex;
+ int _implicitHeaderMode;
+ void (*_onReceive)(int);
+};
+
+extern LoRaClass LoRa;
+
+#endif
\ No newline at end of file
--- /dev/null
+#include <SPI.h>
+#include <LoRa.h>
+#include "Config.h"
+#include "Framing.h"
+#include "Utilities.cpp"
+
+void setup() {
+ // Seed the PRNG
+ randomSeed(analogRead(0));
+
+ // Initialise serial communication
+ Serial.begin(serial_baudrate);
+ while (!Serial);
+
+ // Configure input and output pins
+ pinMode(pin_led_rx, OUTPUT);
+ pinMode(pin_led_tx, OUTPUT);
+
+ // Set up buffers
+ memset(pbuf, 0, sizeof(pbuf));
+ memset(sbuf, 0, sizeof(sbuf));
+ memset(cbuf, 0, sizeof(cbuf));
+
+ // Set chip select, reset and interrupt
+ // pins for the LoRa module
+ LoRa.setPins(pin_cs, pin_reset, pin_dio);
+}
+
+bool startRadio() {
+ update_radio_lock();
+ if (!radio_online) {
+ if (!radio_locked) {
+ if (!LoRa.begin(lora_freq)) {
+ // The radio could not be started.
+ // Indicate this failure over both the
+ // serial port and with the onboard LEDs
+ kiss_indicate_error(ERROR_INITRADIO);
+ led_indicate_error(0);
+ } else {
+ radio_online = true;
+
+ setTXPower();
+ setBandwidth();
+ setSpreadingFactor();
+ getFrequency();
+
+ LoRa.enableCrc();
+ LoRa.onReceive(receiveCallback);
+
+ LoRa.receive();
+
+ // Flash an info pattern to indicate
+ // that the radio is now on
+ led_indicate_info(3);
+ }
+
+ } else {
+ // Flash a warning pattern to indicate
+ // that the radio was locked, and thus
+ // not started
+ led_indicate_warning(3);
+ }
+ } else {
+ // If radio is already on, we silently
+ // ignore the request.
+ }
+}
+
+void stopRadio() {
+ LoRa.end();
+ radio_online = false;
+}
+
+void update_radio_lock() {
+ if (lora_freq != 0 && lora_bw != 0 && lora_txp != 0xFF && lora_sf != 0) {
+ radio_locked = false;
+ } else {
+ radio_locked = true;
+ }
+}
+
+void receiveCallback(int packet_size) {
+ led_rx_on();
+
+ uint8_t header = LoRa.read(); packet_size--;
+ uint8_t sequence = packetSequence(header);
+ bool ready = false;
+
+ if (isSplitPacket(header) && seq == SEQ_UNSET) {
+ // This is the first part of a split
+ // packet, so we set the seq variable
+ // and add the data to the buffer
+ read_len = 0;
+ seq = sequence;
+ last_rssi = LoRa.packetRssi();
+ getPacketData(packet_size);
+ } else if (isSplitPacket(header) && seq == sequence) {
+ // This is the second part of a split
+ // packet, so we add it to the buffer
+ // and set the ready flag.
+ last_rssi = (last_rssi+LoRa.packetRssi())/2;
+ getPacketData(packet_size);
+ seq = SEQ_UNSET;
+ ready = true;
+ } else if (isSplitPacket(header) && seq != sequence) {
+ // This split packet does not carry the
+ // same sequence id, so we must assume
+ // that we are seeing the first part of
+ // a new split packet.
+ read_len = 0;
+ seq = sequence;
+ last_rssi = LoRa.packetRssi();
+ getPacketData(packet_size);
+ } else if (!isSplitPacket(header)) {
+ // This is not a split packet, so we
+ // just read it and set the ready
+ // flag to true.
+
+ if (seq != SEQ_UNSET) {
+ // If we already had part of a split
+ // packet in the buffer, we clear it.
+ read_len = 0;
+ seq = SEQ_UNSET;
+ }
+
+ last_rssi = LoRa.packetRssi();
+ getPacketData(packet_size);
+ ready = true;
+ }
+
+ if (ready) {
+ // We first signal the RSSI of the
+ // recieved packet to the host.
+ Serial.write(FEND);
+ Serial.write(CMD_STAT_RSSI);
+ Serial.write((uint8_t)(last_rssi-rssi_offset));
+
+ // And then write the entire packet
+ Serial.write(FEND);
+ Serial.write(CMD_DATA);
+ for (int i = 0; i < read_len; i++) {
+ uint8_t byte = pbuf[i];
+ if (byte == FEND) { Serial.write(FESC); byte = TFEND; }
+ if (byte == FESC) { Serial.write(FESC); byte = TFESC; }
+ Serial.write(byte);
+ }
+ Serial.write(FEND);
+ read_len = 0;
+ }
+ led_rx_off();
+}
+
+void transmit(size_t size) {
+ if (radio_online) {
+ led_tx_on();
+ size_t written = 0;
+ uint8_t header = random(256) & 0xF0;
+
+ if (size > SINGLE_MTU - HEADER_L) {
+ header = header | FLAG_SPLIT;
+ }
+
+ LoRa.beginPacket();
+ LoRa.write(header); written++;
+
+ for (size_t i; i < size; i++) {
+ LoRa.write(sbuf[i]);
+ written++;
+
+ if (written == 255) {
+ LoRa.endPacket();
+ LoRa.beginPacket();
+ LoRa.write(header);
+ written = 1;
+ }
+ }
+
+ LoRa.endPacket();
+ led_tx_off();
+ LoRa.receive();
+ } else {
+ kiss_indicate_error(ERROR_TXFAILED);
+ led_indicate_error(5);
+ }
+}
+
+void serialCallback(uint8_t sbyte) {
+ if (IN_FRAME && sbyte == FEND && command == CMD_DATA) {
+ IN_FRAME = false;
+ transmit(frame_len);
+ } else if (sbyte == FEND) {
+ IN_FRAME = true;
+ command = CMD_UNKNOWN;
+ frame_len = 0;
+ } else if (IN_FRAME && frame_len < MTU) {
+ // Have a look at the command byte first
+ if (frame_len == 0 && command == CMD_UNKNOWN) {
+ command = sbyte;
+ } else if (command == CMD_DATA) {
+ if (sbyte == FESC) {
+ ESCAPE = true;
+ } else {
+ if (ESCAPE) {
+ if (sbyte == TFEND) sbyte = FEND;
+ if (sbyte == TFESC) sbyte = FESC;
+ ESCAPE = false;
+ }
+ sbuf[frame_len++] = sbyte;
+ }
+ } else if (command == CMD_FREQUENCY) {
+ if (sbyte == FESC) {
+ ESCAPE = true;
+ } else {
+ if (ESCAPE) {
+ if (sbyte == TFEND) sbyte = FEND;
+ if (sbyte == TFESC) sbyte = FESC;
+ ESCAPE = false;
+ }
+ cbuf[frame_len++] = sbyte;
+ }
+
+ if (frame_len == 4) {
+ uint32_t freq = (uint32_t)cbuf[0] << 24 | (uint32_t)cbuf[1] << 16 | (uint32_t)cbuf[2] << 8 | (uint32_t)cbuf[3];
+
+ if (freq == 0) {
+ kiss_indicate_frequency();
+ } else {
+ lora_freq = freq;
+ setFrequency();
+ kiss_indicate_frequency();
+ }
+ }
+ } else if (command == CMD_BANDWIDTH) {
+ if (sbyte == FESC) {
+ ESCAPE = true;
+ } else {
+ if (ESCAPE) {
+ if (sbyte == TFEND) sbyte = FEND;
+ if (sbyte == TFESC) sbyte = FESC;
+ ESCAPE = false;
+ }
+ cbuf[frame_len++] = sbyte;
+ }
+
+ if (frame_len == 4) {
+ uint32_t bw = (uint32_t)cbuf[0] << 24 | (uint32_t)cbuf[1] << 16 | (uint32_t)cbuf[2] << 8 | (uint32_t)cbuf[3];
+
+ if (bw == 0) {
+ kiss_indicate_bandwidth();
+ } else {
+ lora_bw = bw;
+ setBandwidth();
+ kiss_indicate_bandwidth();
+ }
+ }
+ } else if (command == CMD_TXPOWER) {
+ if (sbyte == 0xFF) {
+ kiss_indicate_txpower();
+ } else {
+ int txp = sbyte;
+ if (txp > 17) txp = 17;
+
+ lora_txp = txp;
+ setTXPower();
+ kiss_indicate_txpower();
+ }
+ } else if (command == CMD_SF) {
+ if (sbyte == 0xFF) {
+ kiss_indicate_spreadingfactor();
+ } else {
+ int sf = sbyte;
+ if (sf < 7) sf = 7;
+ if (sf > 12) sf = 12;
+
+ lora_sf = sf;
+ setSpreadingFactor();
+ kiss_indicate_spreadingfactor();
+ }
+ } else if (command == CMD_RADIO_STATE) {
+ if (sbyte == 0xFF) {
+ kiss_indicate_radiostate();
+ } else if (sbyte == 0x00) {
+ stopRadio();
+ kiss_indicate_radiostate();
+ } else if (sbyte == 0x01) {
+ startRadio();
+ kiss_indicate_radiostate();
+ }
+ } else if (command == CMD_STAT_RX) {
+ kiss_indicate_stat_rx();
+ } else if (command == CMD_STAT_TX) {
+ kiss_indicate_stat_tx();
+ } else if (command == CMD_STAT_RSSI) {
+ kiss_indicate_stat_rssi();
+ } else if (command == CMD_RADIO_LOCK) {
+ update_radio_lock();
+ kiss_indicate_radio_lock();
+ } else if (command == CMD_BLINK) {
+ led_indicate_info(sbyte);
+ } else if (command == CMD_RANDOM) {
+ kiss_indicate_random(getRandom());
+ }
+ }
+}
+
+void loop() {
+ if (Serial.available()) {
+ char sbyte = Serial.read();
+ serialCallback(sbyte);
+ }
+}
--- /dev/null
+#include <Arduino.h>
+#include <LoRa.h>
+#include "Config.h"
+#include "Framing.h"
+
+void led_rx_on() { digitalWrite(pin_led_rx, HIGH); }
+void led_rx_off() { digitalWrite(pin_led_rx, LOW); }
+void led_tx_on() { digitalWrite(pin_led_tx, HIGH); }
+void led_tx_off() { digitalWrite(pin_led_tx, LOW); }
+
+void led_indicate_error(int cycles) {
+ bool forever = (cycles == 0) ? true : false;
+ cycles = forever ? 1 : cycles;
+ while(cycles > 0) {
+ digitalWrite(pin_led_rx, HIGH);
+ digitalWrite(pin_led_tx, LOW);
+ delay(100);
+ digitalWrite(pin_led_rx, LOW);
+ digitalWrite(pin_led_tx, HIGH);
+ delay(100);
+ if (!forever) cycles--;
+ }
+ digitalWrite(pin_led_rx, LOW);
+ digitalWrite(pin_led_tx, LOW);
+}
+
+void led_indicate_warning(int cycles) {
+ bool forever = (cycles == 0) ? true : false;
+ cycles = forever ? 1 : cycles;
+ digitalWrite(pin_led_tx, HIGH);
+ while(cycles > 0) {
+ digitalWrite(pin_led_tx, LOW);
+ delay(100);
+ digitalWrite(pin_led_tx, HIGH);
+ delay(100);
+ if (!forever) cycles--;
+ }
+ digitalWrite(pin_led_tx, LOW);
+}
+
+void led_indicate_info(int cycles) {
+ bool forever = (cycles == 0) ? true : false;
+ cycles = forever ? 1 : cycles;
+ while(cycles > 0) {
+ digitalWrite(pin_led_rx, LOW);
+ delay(100);
+ digitalWrite(pin_led_rx, HIGH);
+ delay(100);
+ if (!forever) cycles--;
+ }
+ digitalWrite(pin_led_rx, LOW);
+}
+
+void kiss_indicate_error(uint8_t error_code) {
+ Serial.write(FEND);
+ Serial.write(CMD_ERROR);
+ Serial.write(error_code);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_radiostate() {
+ Serial.write(FEND);
+ Serial.write(CMD_RADIO_STATE);
+ Serial.write(radio_online);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_stat_rx() {
+ Serial.write(FEND);
+ Serial.write(CMD_STAT_RX);
+ Serial.write(stat_rx>>24);
+ Serial.write(stat_rx>>16);
+ Serial.write(stat_rx>>8);
+ Serial.write(stat_rx);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_stat_tx() {
+ Serial.write(FEND);
+ Serial.write(CMD_STAT_TX);
+ Serial.write(stat_tx>>24);
+ Serial.write(stat_tx>>16);
+ Serial.write(stat_tx>>8);
+ Serial.write(stat_tx);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_stat_rssi() {
+ Serial.write(FEND);
+ Serial.write(CMD_STAT_RSSI);
+ Serial.write((uint8_t)last_rssi+rssi_offset);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_radio_lock() {
+ Serial.write(FEND);
+ Serial.write(CMD_RADIO_LOCK);
+ Serial.write(radio_locked);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_spreadingfactor() {
+ Serial.write(FEND);
+ Serial.write(CMD_SF);
+ Serial.write((uint8_t)lora_sf);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_txpower() {
+ Serial.write(FEND);
+ Serial.write(CMD_TXPOWER);
+ Serial.write((uint8_t)lora_txp);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_bandwidth() {
+ Serial.write(FEND);
+ Serial.write(CMD_BANDWIDTH);
+ Serial.write(lora_bw>>24);
+ Serial.write(lora_bw>>16);
+ Serial.write(lora_bw>>8);
+ Serial.write(lora_bw);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_frequency() {
+ Serial.write(FEND);
+ Serial.write(CMD_FREQUENCY);
+ Serial.write(lora_freq>>24);
+ Serial.write(lora_freq>>16);
+ Serial.write(lora_freq>>8);
+ Serial.write(lora_freq);
+ Serial.write(FEND);
+}
+
+void kiss_indicate_random(uint8_t byte) {
+ Serial.write(FEND);
+ Serial.write(CMD_RANDOM);
+ Serial.write(byte);
+ Serial.write(FEND);
+}
+
+bool isSplitPacket(uint8_t header) {
+ return (header & FLAG_SPLIT);
+}
+
+uint8_t packetSequence(uint8_t header) {
+ return header >> 4;
+}
+
+void getPacketData(int len) {
+ while (len--) {
+ pbuf[read_len++] = LoRa.read();
+ }
+}
+
+
+void setSpreadingFactor() {
+ if (radio_online) LoRa.setSpreadingFactor(lora_sf);
+}
+
+void setTXPower() {
+ if (radio_online) LoRa.setTxPower(lora_txp);
+}
+
+
+void getBandwidth() {
+ if (radio_online) {
+ lora_bw = LoRa.getSignalBandwidth();
+ }
+}
+
+void setBandwidth() {
+ if (radio_online) {
+ LoRa.setSignalBandwidth(lora_bw);
+ getBandwidth();
+ }
+}
+
+void getFrequency() {
+ if (radio_online) {
+ lora_freq = LoRa.getFrequency();
+ }
+}
+
+void setFrequency() {
+ if (radio_online) {
+ LoRa.setFrequency(lora_freq);
+ getFrequency();
+ }
+}
+
+uint8_t getRandom() {
+ if (radio_online) {
+ return LoRa.random();
+ } else {
+ return 0x00;
+ }
+}
projects / lora-radio.git / commitdiff