File content as of revision 4:05d5aa4d3f2d:

#include "SX1272.h"

InterruptIn dio0(P0_12);

//#define BAND868
#define MAX_DBM 14
#define DATA 0
#define PING 1
#define PONG 2


#define ADDRESS 10

const uint32_t DEFAULT_CHANNEL=CH_12_900;//915Mhz CH_12_900 =>0xE4C000;

///////////////////////////////////////////////////////////////////
// CHANGE HERE THE LORA MODE, NODE ADDRESS
#define LORAMODE  1
#define node_addr 6
//////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////
// CHANGE HERE THE THINGSPEAK FIELD BETWEEN 1 AND 4
#define field_index 1
///////////////////////////////////////////////////////////////////
#define DEFAULT_DEST_ADDR 6


///////////////////////////////////////
// Globals variables
///////////////////////////////////////

//___________SX1272____________________
int e;

//___________mensagem_____________________
uint8_t message[255];
uint8_t buffer[255];
uint8_t message_pong[]="Pong";
uint8_t message_ping[]="Ping";
uint8_t r_size;
uint8_t lora_mode_ant;
char float_temp[10];
char float_press[10];
char float_hum[10];
int cont =0;
int loraMode=LORAMODE;


////////////////////////////////////////
// SETUP SX1272 initialisation
////////////////////////////////////////
void lora_setup()
{


    //printf("------Coragem LoRa temperature sensor-------------\n");
    //sx1272.ON();  // Power ON the module

    int error_config_sx1272=0;

    // Set transmission mode and print the result
    e = sx1272.setMode(loraMode);
    //printf("Mode: %d\n",loraMode);
    if (e) error_config_sx1272=1;
    //printf("Setting Mode: state %d\n",e);

    // enable carrier sense
    sx1272._enableCarrierSense=true;

    // for LOW POWER
    sx1272._RSSIonSend=false;


    // Select frequency channel
    e = sx1272.setChannel(DEFAULT_CHANNEL);
    if (e) error_config_sx1272=1;
    //printf("Setting Channel: state %d\n",e);

    // Select amplifier line; PABOOST or RFO
//    #ifdef PABOOST
//        printf("pabboost\n");
//        sx1272._needPABOOST=true;
//    // previous way for setting output power
//    // powerLevel='x';
//    #else
//    // previous way for setting output power
//    // powerLevel='M';
//    #endif

    // previous way for setting output power
    // e = sx1272.setPower(powerLevel);

    e = sx1272.setPowerDBM((uint8_t)MAX_DBM);
    if (e) error_config_sx1272=1;
    printf("Setting Power: state %d\n",e);

    // Set the node address and print the result
    e = sx1272.setNodeAddress(node_addr);
    if (e) error_config_sx1272=1;
    printf("Setting node addr: state %d\n",e);

    // Print a success message
    if (!error_config_sx1272) printf("SX1272 successfully configured\n");
    else printf("ERROR CONFIGURATION SX1272\n");

    wait_ms(400);
}
void lora_send_packet (uint8_t *payload, uint8_t length8)   // envia pacote
{

    //write on FIFO
    sx1272.writeRegister(REG_IRQ_FLAGS,255);//clear flags
    sx1272.writeRegister(REG_OP_MODE, LORA_STANDBY_MODE);  // Stdby LoRa mode to write in FIFO
    sx1272.writeRegister(REG_PAYLOAD_LENGTH_LORA, length8);
    sx1272.writeRegister(REG_FIFO_TX_BASE_ADDR,0x00);
    sx1272.writeRegister(REG_FIFO_ADDR_PTR,0x00);

    for(unsigned int i = 0; i <= length8; i++) {
        sx1272.writeRegister(REG_FIFO, payload[i]);  // Writing the payload in FIFO
    }

    //________________Send Data__________________
    sx1272.writeRegister(REG_IRQ_FLAGS,255);//clear flags
    sx1272.writeRegister(REG_OP_MODE, LORA_TX_MODE);  // LORA mode - Tx

    unsigned long exitTime = millis()+1400;//2 segundos para sair do for
    unsigned long Time= millis();
    char value = sx1272.readRegister(REG_IRQ_FLAGS);

    while ((bitRead(value, 3) == 0) && (Time < exitTime)) {
        value=sx1272.readRegister(REG_IRQ_FLAGS);
        Time= millis();
        wait_ms(50);
    }

    wait_ms(50);

}

void lora_send_data(int mode)  //data predefined
{
    led1=1;
    sx1272.writeRegister(REG_OP_MODE,129);//standby
    
    

    if (mode == DATA ) {
        #ifdef  BME280  
        sprintf(float_temp,"%2.2f",getTemperature());
        sprintf(float_press,"%04.2f",getPressure());
        sprintf(float_hum,"%2.2f",getHumidity());

        //============= internet of turtles =============
        sprintf(float_breathing_time,"%04.2f", last_breathing_time);
        sprintf(float_diving_time,"%04.2f", last_diving_time);
        r_size=sprintf((char*)message,"\\!#Dt%04.2f_Bt%04.2f_%s°C_%shPa_%s%%",last_diving_time,last_breathing_time,float_temp,float_press,float_hum);
        // ==============================================

        //size=sprintf((char*)message,"\\!#%s°C_%shPa_%s%%",float_temp,float_press,float_hum);

        lora_send_packet(message,r_size);
//        sx1272.sendPacketTimeout(DEFAULT_DEST_ADDR,/* (uint8_t*)*/message, r_size);
        printf("packet send :\n%s\nrsize=%d\n",message,r_size);
        #endif

    } else if (mode == PING ) {


        //sx1272.sendPacketTimeout(DEFAULT_DEST_ADDR, message_ping, sizeof(message_ping));
        lora_send_packet(message_ping,sizeof(message_ping));
        printf("packet send :\n%s\n",message_ping);


    } else if (mode == PONG )  {

        //sx1272.sendPacketTimeout(DEFAULT_DEST_ADDR, message_pong, sizeof(message_pong));
        lora_send_packet(message_pong,sizeof(message_pong));
        printf("packet send :\n%s\n",message_pong);
    }

    wait_ms(300);

    sx1272.writeRegister(REG_IRQ_FLAGS,255);//clear flags
    sx1272.writeRegister(REG_OP_MODE,133); //leitura continua
    cont++;
    printf("number=%d\n",cont);

    led1=0;
}


void lora_print_packet()
{

    led2=1;
    sx1272.writeRegister(REG_OP_MODE,129);//standby

    uint8_t pac_size;

    sx1272.writeRegister(REG_FIFO_ADDR_PTR,sx1272.readRegister(REG_FIFO_RX_CURRENT_ADDR));//set fifo pointer to read packet
    pac_size = sx1272.readRegister(REG_RX_NB_BYTES);//read size of packet
    for(int i =0 ; i<pac_size ; i++) { //print packet
        buffer[i]=sx1272.readRegister(REG_FIFO);
        if (buffer[i]== '\n')  printf(" \\n");
        if (buffer[i]== 0x0B)  printf("tab");
        printf("%c",buffer[i]);//print packet
    }
    printf("\n");


    for(int i =0 ; i<pac_size ; i++) { 
        if ((buffer[i] =='P') && (buffer[i+1] =='i') && (buffer[i+2] =='n') && (buffer[i+3] =='g') ) { //look for Ping in packet
            sx1272.writeRegister(0x12,255);//clear flags
            lora_send_data(PONG);
            i=pac_size;
        }
        if ((buffer[i] =='R') && (buffer[i+1] =='e') && (buffer[i+2] =='s') && (buffer[i+3] =='e') && (buffer[i+4] =='t')  ) {// look reset
            uint32_t *ptr;
            ptr = (uint32_t *)1073743132;// endereço gpregret 0x4000051C
            *ptr = 0xB1;//BOOTLOADER_DFU_START
            NVIC_SystemReset();
        }
       
    }


    wait_ms(30);
    sx1272.writeRegister(REG_IRQ_FLAGS,255);//clear flags
    sx1272.writeRegister(REG_OP_MODE,133); //leitura continua
    led2=0;

}
void lora_sleep(){
    lora_mode_ant = sx1272.readRegister(REG_OP_MODE);
    sx1272.writeRegister(REG_OP_MODE,LORA_SLEEP_MODE); //leitura continua
    
    }
    
int lora_wake(){
    if (lora_mode_ant!= 0){
        sx1272.writeRegister(REG_OP_MODE,lora_mode_ant); //leitura continua
        return 0; 
    }
    else return -1;
}