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LoRaMESH.h
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#ifndef LoRaMESH_h
#define LoRaMESH_h
#include <Stream.h>
#define MAX_PAYLOAD_SIZE 232
#define MAX_BUFFER_SIZE 237
#define BW125 0x00
#define BW250 0x01
#define BW500 0x02
#define SF_LoRa_7 0x07
#define SF_LoRa_8 0x08
#define SF_LoRa_9 0x09
#define SF_LoRa_10 0x0A
#define SF_LoRa_11 0x0B
#define SF_LoRa_12 0x0C
#define SF_FSK 0x00
#define CR4_5 0x01
#define CR4_6 0x02
#define CR4_7 0x03
#define CR4_8 0x04
#define LoRa_CLASS_A 0x00
#define LoRa_CLASS_C 0x02
#define LoRa_WINDOW_5s 0x00
#define LoRa_WINDOW_10s 0x01
#define LoRa_WINDOW_15s 0x02
#define LoRa_GPIO_MODE_READ 0x00
#define LoRa_GPIO_MODE_CONFIG 0x02
#define LoRa_GPIO_MODE_WRITE 0x01
#define LoRa_GPIO0 0x00
#define LoRa_GPIO1 0x01
#define LoRa_GPIO2 0x02
#define LoRa_GPIO3 0x03
#define LoRa_GPIO4 0x04
#define LoRa_GPIO5 0x05
#define LoRa_GPIO6 0x06
#define LoRa_GPIO7 0x07
#define LoRa_NOT_PULL 0x00
#define LoRa_PULLUP 0x01
#define LoRa_PULLDOWN 0x02
#define LoRa_INOUT_DIGITAL_INPUT 0x00
#define LoRa_INOUT_DIGITAL_OUTPUT 0x01
#define LoRa_INOUT_ANALOG_INPUT 0x03
#define LoRa_LOGICAL_LEVEL_LOW 0x00
#define LoRa_LOGICAL_LEVEL_HIGH 0x01
class LoRaMESH{
public:
bool debug_serial = false;
typedef struct
{
uint8_t buffer[MAX_BUFFER_SIZE];
uint8_t size;
bool command;
} Frame_Typedef;
uint8_t bufferPayload[MAX_PAYLOAD_SIZE] = {0};
uint8_t payloadSize = 0;
uint16_t localId = 0;
uint32_t localUniqueId;
uint8_t command;
bool isMaster;
Frame_Typedef frame;
uint16_t deviceId = -1;
uint16_t deviceNet = -1;
uint32_t deviceUniqueId = -1;
uint32_t registered_password;
uint8_t BW, SF, CR, LoRa_class, LoRa_window;
Stream* SerialLoRa;
Stream* SerialLoRat;
LoRaMESH(Stream *_SerialLoRa, Stream *_SerialLoRat = NULL){
SerialLoRa = _SerialLoRa;
SerialLoRat = _SerialLoRat;
}
uint16_t ComputeCRC(uint8_t* data_in, uint16_t length){
uint16_t i;
uint8_t bitbang, j;
uint16_t crc_calc;
crc_calc = 0xC181;
for(i=0; i<length; i++)
{
crc_calc ^= (((uint16_t)data_in[i]) & 0x00FF);
for(j=0; j<8; j++)
{
bitbang = crc_calc;
crc_calc >>= 1;
if(bitbang & 1)
{
crc_calc ^= 0xA001;
}
}
}
return (crc_calc&0xFFFF);
}
bool PrepareFrameCommand(uint16_t id, uint8_t command, uint8_t* payload, uint8_t payloadSize){
if(command == 0) return false;
if(payload == NULL) return false;
if(payloadSize == 0) return false;
uint16_t crc = 0;
frame.size = payloadSize + 5;
frame.buffer[0] = id&0xFF;
frame.buffer[1] = (id>>8)&0xFF;
frame.buffer[2] = command;
if((payloadSize >= 0) && (payloadSize < MAX_PAYLOAD_SIZE))
{
memcpy(&(frame.buffer[3]), payload, payloadSize);
crc = ComputeCRC((&frame.buffer[0]), payloadSize+3);
frame.buffer[payloadSize+3] = crc&0xFF;
frame.buffer[payloadSize+4] = (crc>>8)&0xFF;
}
else
{
memset(&frame.buffer[0], 0, MAX_BUFFER_SIZE);
return false;
}
frame.command = true;
return true;
}
bool PrepareFrameTransp(uint16_t id, uint8_t* payload, uint8_t payloadSize)
{
uint8_t i = 0;
if(payload == NULL) return false;
if(id > 1023) return false;
if(deviceId == -1) return false;
frame.size = payloadSize + 2;
frame.buffer[i++] = id&0xFF;
frame.buffer[i++] = (id>>8)&0x03;
/*
if((id != 0) && (deviceId == 0))
{
frame.size = payloadSize + 2;
frame.buffer[i++] = id&0xFF;
frame.buffer[i++] = (id>>8)&0x03;
}
else
{
frame.size = payloadSize;
}*/
if((payloadSize >= 0) && (payloadSize < MAX_PAYLOAD_SIZE))
{
/* Loads the payload */
memcpy(&frame.buffer[i], payload, payloadSize);
}
else
{
/* Invalid payload size */
memset(&frame.buffer[0], 0, MAX_BUFFER_SIZE);
return false;
}
frame.command = false;
return true;
}
bool SendPacket(){
if(frame.size == 0) return false;
if(debug_serial)
{
Serial.print("TX: ");
printHex(frame.buffer, frame.size);
}
if(frame.command)
SerialLoRa->write(frame.buffer, frame.size);
else
if(SerialLoRat == NULL)
return false;
else
SerialLoRat->write(frame.buffer, frame.size);
return true;
}
bool ReceivePacketCommand(uint16_t* id, uint8_t* command, uint8_t* payload, uint8_t* payloadSize, uint32_t timeout){
uint16_t waitNextByte = 500;
uint8_t i = 0;
uint16_t crc = 0;
if(id == NULL) return false;
if(command == NULL) return false;
if(payload == NULL) return false;
if(payloadSize == NULL) return false;
while( ((timeout > 0 ) || (i > 0)) && (waitNextByte > 0) )
{
if(SerialLoRa->available() > 0)
{
byte a = SerialLoRa->read();
frame.buffer[i++] = a;
waitNextByte = 200;
}
if(i > 0){
waitNextByte--;
}
timeout--;
delay(1);
}
if(i > 0){
Serial.print("RX: ");
printHex(frame.buffer, i);
}
if((timeout == 0) && (i == 0)) return false;
crc = (uint16_t)frame.buffer[i-2] | ((uint16_t)frame.buffer[i-1] << 8);
if(ComputeCRC(&frame.buffer[0], i-2) != crc) return false;
*id = (uint16_t)frame.buffer[0] | ((uint16_t)frame.buffer[1] << 8);
*command = frame.buffer[2];
*payloadSize = i-5;
memcpy(payload, &frame.buffer[3], i-5);
return true;
}
bool ReceivePacketTransp(uint16_t* id, uint8_t* payload, uint8_t* payloadSize, uint32_t timeout)
{
uint16_t waitNextByte = 500;
uint8_t i = 0;
/* Assert parameters */
/*
if((id == NULL) && (deviceId == 0)) return false;
if(payload == NULL) return false;
if(payloadSize == NULL) return false;
if(deviceId == -1) return false;
*/
/* Waits for reception */
while( ((timeout > 0 ) || (i > 0)) && (waitNextByte > 0) )
{
if(SerialLoRat->available() > 0)
{
frame.buffer[i++] = SerialLoRat->read();
waitNextByte = 500;
}
if(i > 0)
{
waitNextByte--;
}
timeout--;
delay(1);
}
/* In case it didn't get any data */
if((timeout == 0) && (i == 0)) return false;
if(deviceId == 0)
{
/* Copies ID */
*id = (uint16_t)frame.buffer[0] | ((uint16_t)frame.buffer[1] << 8);
/* Copies payload size */
*payloadSize = i-2;
/* Copies payload */
memcpy(payload, &frame.buffer[3], i-2);
}
else
{
/* Copies payload size */
*payloadSize = i;
/* Copies payload */
memcpy(payload, &frame.buffer[0], i);
}
return true;
}
bool localread(){
uint8_t b = 0;
bufferPayload[b] = 0x00;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(0, 0xE2, bufferPayload, b + 1);
SendPacket();
if(ReceivePacketCommand(&localId, &command, bufferPayload, &payloadSize, 1000)){
if(command == 0xE2)
{
registered_password = bufferPayload[1] << 8;
registered_password += bufferPayload[0];
localUniqueId = bufferPayload[2];
localUniqueId = bufferPayload[3] + (localUniqueId << 8);
localUniqueId = bufferPayload[4] + (localUniqueId << 8);
localUniqueId = bufferPayload[5] + (localUniqueId << 8);
return true;
}
}
return false;
}
void begin(bool _debug_serial = false){
debug_serial = _debug_serial;
localread();
localId = (uint16_t)frame.buffer[0] | ((uint16_t)frame.buffer[1] << 8);
}
bool setnetworkId(uint16_t id){
uint8_t b = 0;
bufferPayload[b] = 0x00;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = (uint8_t)(localUniqueId >> 24);
bufferPayload[++b] = (uint8_t)(localUniqueId >> 16);
bufferPayload[++b] = (uint8_t)(localUniqueId >> 8);
bufferPayload[++b] = (uint8_t)(localUniqueId & 0xFF);
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x04;
PrepareFrameCommand(id, 0xCA, bufferPayload, b + 1);
SendPacket();
if(ReceivePacketCommand(&localId, &command, bufferPayload, &payloadSize, 1000))
{
if(command == 0xCA)
return true;
}
return false;
}
bool setpassword(uint32_t password){
if(password < 0x00 || password < 0x00 || password > 0xFFFFFFFF)
return false;
uint8_t b = 0;
uint32_t buffer_password;
bufferPayload[b] = 0x04;
bufferPayload[++b] = password % 256;
bufferPayload[++b] = (password / 256) & 0xFF;
bufferPayload[++b] = ((password / 256) >> 8) & 0xFF;
bufferPayload[++b] = ((password / 256) >> 16) & 0xFF;
PrepareFrameCommand(localId, 0xCD, bufferPayload, b + 1);
SendPacket();
buffer_password = bufferPayload[2] << 8;
buffer_password += bufferPayload[1];
if(ReceivePacketCommand(&localId, &command, bufferPayload, &payloadSize, 1000))
{
if(command == 0xCD)
{
localread();
if(buffer_password == registered_password)
return true;
}
}
return false;
}
bool read_config_bps(bool ignore_cmd = false){
uint8_t b = 0;
if(!ignore_cmd){
bufferPayload[b] = 0x00;
bufferPayload[++b] = 0x01;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(localId, 0xD6, bufferPayload, b + 1);
SendPacket();
}
if(ReceivePacketCommand(&localId, &command, bufferPayload, &payloadSize, 1000)){
if(command == 0xD6){
BW = bufferPayload[2];
SF = bufferPayload[3];
CR = bufferPayload[4];
return true;
}
}
return false;
}
bool read_config_class(bool ignore_cmd = false){
uint8_t b = 0;
if(!ignore_cmd){
bufferPayload[b] = 0x00;
bufferPayload[++b] = 0xFF;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(localId, 0xC1, bufferPayload, b + 1);
SendPacket();
}
if(ReceivePacketCommand(&localId, &command, bufferPayload, &payloadSize, 1000)){
if(command == 0xC1){
LoRa_class = bufferPayload[2];
LoRa_window = bufferPayload[3];
return true;
}
}
return false;
}
bool config_bps(uint8_t bandwidth = BW500, uint8_t spreading_factor = SF_LoRa_7, uint8_t coding_rate = CR4_5){
if(bandwidth < 0x00 || bandwidth > 0x02)
return false;
else if(spreading_factor < 0x00 || spreading_factor > 0x00 && spreading_factor < 0x07 || spreading_factor > 0x0C)
return false;
else if(coding_rate < 0x00 || coding_rate < 0x01 || coding_rate > 0x04)
return false;
uint8_t b = 0;
bufferPayload[b] = 0x01;
bufferPayload[++b] = 0x14;
bufferPayload[++b] = bandwidth;
bufferPayload[++b] = spreading_factor;
bufferPayload[++b] = coding_rate;
PrepareFrameCommand(localId, 0xD6, bufferPayload, b + 1);
SendPacket();
read_config_bps(true);
if(BW == bandwidth && SF == spreading_factor && CR == coding_rate)
return true;
return false;
}
bool config_class(uint8_t lora_class = LoRa_CLASS_C, uint8_t lora_window = LoRa_WINDOW_5s){
if(lora_class < 0x00 || lora_class != 0x00 && lora_class != 0x02)
return false;
else if(lora_window < 0x00 || lora_window > 0x02)
return false;
uint8_t b = 0;
bufferPayload[b] = 0x00;
bufferPayload[++b] = lora_class;
bufferPayload[++b] = lora_window;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(localId, 0xC1, bufferPayload, b + 1);
SendPacket();
read_config_class(true);
if(LoRa_class == lora_class && LoRa_window == lora_window)
return true;
return false;
}
bool config_digital_gpio(uint8_t gpio, uint8_t pull, uint8_t inout, uint8_t logical_level){
if(gpio < 0x00 || gpio > 0x07)
return false;
else if(pull < 0x00 || pull > 0x02)
return false;
else if(inout < 0x00 || inout == 0x02 || inout == 0x03 && gpio < 0x05 && inout == 0x03 && gpio > 0x06 || inout > 0x03)
return false;
else if(logical_level < 0x00 || logical_level > 0x03)
return false;
uint8_t b = 0;
bufferPayload[b] = 0x02;
bufferPayload[++b] = gpio;
bufferPayload[++b] = pull;
bufferPayload[++b] = inout;
bufferPayload[++b] = logical_level;
PrepareFrameCommand(localId, 0xC2, bufferPayload, b + 1);
SendPacket();
if(ReceivePacketCommand(&localId, &command, bufferPayload, &payloadSize, 1000))
{
if(command == 0xC2){
return true;
}
}
return false;
}
bool config_analog_gpio(uint8_t gpio){
if(gpio < 0x05 || gpio > 0x06)
return false;
uint8_t b = 0;
bufferPayload[b] = 0x02;
bufferPayload[++b] = gpio;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = LoRa_INOUT_ANALOG_INPUT;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(localId, 0xC2, bufferPayload, b + 1);
SendPacket();
return true;
}
void get_gpio_status(int16_t id, uint8_t gpio){
uint8_t b = 0;
bufferPayload[b] = 0x00;
bufferPayload[++b] = gpio;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(id, 0xC2, bufferPayload, b + 1);
SendPacket();
}
double read_gpio(int16_t id, uint8_t gpio, bool analog = false){
get_gpio_status(id, gpio);
if(ReceivePacketCommand(&localId, &command, bufferPayload, &payloadSize, 1000))
{
if(command == 0xC2){
if(analog){
uint8_t voltage = (uint16_t)bufferPayload[4] | ((uint16_t)(bufferPayload[3]&0x0F) << 8);
return float(voltage)*8.0586e-4;
}
else
return bufferPayload[4];
}
}
return 0;
}
bool write_gpio(int16_t id, uint8_t gpio, uint8_t logical_level){
if(gpio < 0x00 || gpio > 0x07)
return false;
else if(logical_level < 0x00 || logical_level > 0x03)
return false;
uint8_t b = 0;
bufferPayload[b] = 0x01;
bufferPayload[++b] = gpio;
bufferPayload[++b] = logical_level;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(id, 0xC2, bufferPayload, b + 1);
SendPacket();
return true;
}
bool write_gpio_mask(int16_t id, uint8_t logical_level_mask){
uint8_t b = 0;
bufferPayload[b] = 0x81;
bufferPayload[++b] = 0x00;
bufferPayload[++b] = logical_level_mask;
bufferPayload[++b] = 0x00;
PrepareFrameCommand(id, 0xC2, bufferPayload, b + 1);
SendPacket();
return true;
}
void printHex(uint8_t* num, uint8_t tam){
char hexCar[4];
uint8_t index;
for(index = 0; index < tam - 1; index++)
{
sprintf(hexCar, "%02X", num[index]);
Serial.print(hexCar);
}
sprintf(hexCar, "%02X", num[index]);
Serial.println(hexCar);
}
};
#endif