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gateway.c
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#include <features.h>
#define __USE_XOPEN
#include <stdio.h>
#include <stdio.h>
#include <curl/curl.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <errno.h>
#include <stdint.h>
#include <stdarg.h>
#include <pthread.h>
#include <curses.h>
#include <math.h>
#include <dirent.h>
#include <wiringPi.h>
#include <wiringPiSPI.h>
#include <time.h>
#include "urlencode.h"
#include "base64.h"
#include "ssdv.h"
#include "ftp.h"
#include "habitat.h"
#include "network.h"
#include "global.h"
#include "server.h"
#include "gateway.h"
#include "config.h"
#define VERSION "V1.8.6"
bool run = TRUE;
// RFM98
uint8_t currentMode = 0x81;
#define REG_FIFO 0x00
#define REG_FIFO_ADDR_PTR 0x0D
#define REG_FIFO_TX_BASE_AD 0x0E
#define REG_FIFO_RX_BASE_AD 0x0F
#define REG_RX_NB_BYTES 0x13
#define REG_OPMODE 0x01
#define REG_FIFO_RX_CURRENT_ADDR 0x10
#define REG_IRQ_FLAGS 0x12
#define REG_PACKET_SNR 0x19
#define REG_PACKET_RSSI 0x1A
#define REG_CURRENT_RSSI 0x1B
#define REG_DIO_MAPPING_1 0x40
#define REG_DIO_MAPPING_2 0x41
#define REG_MODEM_CONFIG 0x1D
#define REG_MODEM_CONFIG2 0x1E
#define REG_MODEM_CONFIG3 0x26
#define REG_PAYLOAD_LENGTH 0x22
#define REG_IRQ_FLAGS_MASK 0x11
#define REG_HOP_PERIOD 0x24
#define REG_FREQ_ERROR 0x28
#define REG_DETECT_OPT 0x31
#define REG_DETECTION_THRESHOLD 0x37
// MODES
#define RF98_MODE_RX_CONTINUOUS 0x85
#define RF98_MODE_TX 0x83
#define RF98_MODE_SLEEP 0x80
#define RF98_MODE_STANDBY 0x81
#define PAYLOAD_LENGTH 255
// Modem Config 1
#define EXPLICIT_MODE 0x00
#define IMPLICIT_MODE 0x01
#define ERROR_CODING_4_5 0x02
#define ERROR_CODING_4_6 0x04
#define ERROR_CODING_4_7 0x06
#define ERROR_CODING_4_8 0x08
#define BANDWIDTH_7K8 0x00
#define BANDWIDTH_10K4 0x10
#define BANDWIDTH_15K6 0x20
#define BANDWIDTH_20K8 0x30
#define BANDWIDTH_31K25 0x40
#define BANDWIDTH_41K7 0x50
#define BANDWIDTH_62K5 0x60
#define BANDWIDTH_125K 0x70
#define BANDWIDTH_250K 0x80
#define BANDWIDTH_500K 0x90
// Modem Config 2
#define SPREADING_6 0x60
#define SPREADING_7 0x70
#define SPREADING_8 0x80
#define SPREADING_9 0x90
#define SPREADING_10 0xA0
#define SPREADING_11 0xB0
#define SPREADING_12 0xC0
#define CRC_OFF 0x00
#define CRC_ON 0x04
// POWER AMPLIFIER CONFIG
#define REG_PA_CONFIG 0x09
#define PA_MAX_BOOST 0x8F
#define PA_LOW_BOOST 0x81
#define PA_MED_BOOST 0x8A
#define PA_MAX_UK 0x88
#define PA_OFF_BOOST 0x00
#define RFO_MIN 0x00
// LOW NOISE AMPLIFIER
#define REG_LNA 0x0C
#define LNA_MAX_GAIN 0x23 // 0010 0011
#define LNA_OFF_GAIN 0x00
#define LNA_LOW_GAIN 0xC0 // 1100 0000
struct TLoRaMode
{
int ImplicitOrExplicit;
int ErrorCoding;
int Bandwidth;
int SpreadingFactor;
int LowDataRateOptimize;
int BaudRate;
char *Description;
} LoRaModes[] =
{
{EXPLICIT_MODE, ERROR_CODING_4_8, BANDWIDTH_20K8, SPREADING_11, 1, 60, "Telemetry"}, // 0: Normal mode for telemetry
{IMPLICIT_MODE, ERROR_CODING_4_5, BANDWIDTH_20K8, SPREADING_6, 0, 1400, "SSDV"}, // 1: Normal mode for SSDV
{EXPLICIT_MODE, ERROR_CODING_4_8, BANDWIDTH_62K5, SPREADING_8, 0, 2000, "Repeater"}, // 2: Normal mode for repeater network
{EXPLICIT_MODE, ERROR_CODING_4_6, BANDWIDTH_250K, SPREADING_7, 0, 8000, "Turbo"}, // 3: Normal mode for high speed images in 868MHz band
{IMPLICIT_MODE, ERROR_CODING_4_5, BANDWIDTH_250K, SPREADING_6, 0, 16828, "TurboX"}, // 4: Fastest mode within IR2030 in 868MHz band
{EXPLICIT_MODE, ERROR_CODING_4_8, BANDWIDTH_41K7, SPREADING_11, 0, 200, "Calling"}, // 5: Calling mode
{IMPLICIT_MODE, ERROR_CODING_4_5, BANDWIDTH_41K7, SPREADING_6, 0, 2800, "Uplink"} // 6: Uplink mode for 868
};
struct TConfig Config;
struct TBandwidth
{
int LoRaValue;
double Bandwidth;
char *ConfigString;
} Bandwidths[] =
{
{BANDWIDTH_7K8, 7.8, "7K8"},
{BANDWIDTH_10K4, 10.4, "10K4"},
{BANDWIDTH_15K6, 15.6, "15K6"},
{BANDWIDTH_20K8, 20.8, "20K8"},
{BANDWIDTH_31K25, 31.25, "31K25"},
{BANDWIDTH_41K7, 41.7, "41K7"},
{BANDWIDTH_62K5, 62.5, "62K5"},
{BANDWIDTH_125K, 125.0, "125K"},
{BANDWIDTH_250K, 250.0, "250K"},
{BANDWIDTH_500K, 500.0, "500K"}
};
int LEDCounts[2];
pthread_mutex_t var = PTHREAD_MUTEX_INITIALIZER;
#pragma pack(1)
struct TBinaryPacket {
uint8_t PayloadIDs;
uint16_t Counter;
uint16_t BiSeconds;
float Latitude;
float Longitude;
uint16_t Altitude;
};
// Create pipes for inter proces communication
// GLOBAL AS CALLED FROM INTERRRUPT
int telem_pipe_fd[2];
int ssdv_pipe_fd[2];
// Create a structure to share some variables with the habitat child process
// GLOBAL AS CALLED FROM INTERRRUPT
thread_shared_vars_t htsv;
// Create a structure to share some variables with the ssdv child process
// GLOBAL AS CALLED FROM INTERRRUPT
thread_shared_vars_t stsv;
int habitate_telem_packets = 0;
WINDOW *mainwin=NULL; // Curses window
void CloseDisplay( WINDOW * mainwin )
{
/* Clean up after ourselves */
delwin( mainwin );
endwin( );
refresh( );
}
void bye(void)
{
if (mainwin != NULL)
{
CloseDisplay( mainwin);
mainwin = NULL;
}
}
void exit_error(char *msg)
{
bye(); // Close ncurses window, plus any future tidy-ups
fprintf(stderr, msg);
exit(1);
}
void
hexdump_buffer( const char *title, const char *buffer, const int len_buffer )
{
int i, j = 0;
char message[200];
FILE *fp;
fp = fopen( "pkt.txt", "a" );
fprintf( fp, "Title = %s\n", title );
for ( i = 0; i < len_buffer; i++ )
{
sprintf( &message[3 * j], "%02x ", buffer[i] );
j++;
if ( i % 16 == 15 )
{
j = 0;
fprintf( fp, "%s\n", message );
message[0] = '\0';
}
}
fprintf( fp, "%s\n", message );
fclose( fp );
}
void
writeRegister( int Channel, uint8_t reg, uint8_t val )
{
unsigned char data[2];
data[0] = reg | 0x80;
data[1] = val;
wiringPiSPIDataRW( Channel, data, 2 );
}
uint8_t
readRegister( int Channel, uint8_t reg )
{
unsigned char data[2];
uint8_t val;
data[0] = reg & 0x7F;
data[1] = 0;
wiringPiSPIDataRW( Channel, data, 2 );
val = data[1];
return val;
}
void LogPacket( int Channel, int8_t SNR, int RSSI, double FreqError, int Bytes, unsigned char MessageType )
{
if ( Config.EnablePacketLogging )
{
FILE *fp;
if ( ( fp = fopen( "packets.txt", "at" ) ) != NULL )
{
time_t now;
struct tm *tm;
now = time( 0 );
tm = localtime( &now );
fprintf( fp,
"%02d:%02d:%02d - Ch %d, SNR %d, RSSI %d, FreqErr %.1lf, Bytes %d, Type %02Xh\n",
tm->tm_hour, tm->tm_min, tm->tm_sec, Channel, SNR, RSSI,
FreqError, Bytes, MessageType );
fclose( fp );
}
}
}
void LogTelemetryPacket(char *Telemetry)
{
// if (Config.EnableTelemetryLogging)
{
FILE *fp;
if ( ( fp = fopen( "telemetry.txt", "at" ) ) != NULL )
{
time_t now;
struct tm *tm;
now = time( 0 );
tm = localtime( &now );
fprintf( fp, "%02d:%02d:%02d - %s\n", tm->tm_hour, tm->tm_min,
tm->tm_sec, Telemetry );
fclose( fp );
}
}
}
void LogMessage( const char *format, ... )
{
static WINDOW *Window = NULL;
char Buffer[512];
pthread_mutex_lock( &var ); // lock the critical section
if ( Window == NULL )
{
// Window = newwin(25, 30, 0, 50);
Window = newwin( LINES - 16, COLS, 16, 0 );
scrollok( Window, TRUE );
}
va_list args;
va_start( args, format );
vsprintf( Buffer, format, args );
va_end( args );
if ( strlen( Buffer ) > COLS - 1 )
{
Buffer[COLS - 3] = '.';
Buffer[COLS - 2] = '.';
Buffer[COLS - 1] = '\n';
Buffer[COLS] = 0;
}
waddstr( Window, Buffer );
wrefresh( Window );
pthread_mutex_unlock( &var ); // unlock once you are done
}
void ChannelPrintf(int Channel, int row, int column, const char *format, ... )
{
char Buffer[80];
va_list args;
pthread_mutex_lock( &var ); // lock the critical section
va_start( args, format );
vsprintf( Buffer, format, args );
va_end( args );
mvwaddstr( Config.LoRaDevices[Channel].Window, row, column, Buffer );
wrefresh( Config.LoRaDevices[Channel].Window );
pthread_mutex_unlock( &var ); // unlock once you are done
}
void
setMode( int Channel, uint8_t newMode )
{
if ( newMode == currentMode )
return;
switch ( newMode )
{
case RF98_MODE_TX:
writeRegister( Channel, REG_LNA, LNA_OFF_GAIN ); // TURN LNA OFF FOR TRANSMITT
writeRegister( Channel, REG_PA_CONFIG, Config.LoRaDevices[Channel].Power ); // PA_MAX_UK
writeRegister( Channel, REG_OPMODE, newMode );
currentMode = newMode;
break;
case RF98_MODE_RX_CONTINUOUS:
writeRegister( Channel, REG_PA_CONFIG, PA_OFF_BOOST ); // TURN PA OFF FOR RECIEVE??
writeRegister( Channel, REG_LNA, LNA_MAX_GAIN ); // MAX GAIN FOR RECEIVE
writeRegister( Channel, REG_OPMODE, newMode );
currentMode = newMode;
// LogMessage("Changing to Receive Continuous Mode\n");
break;
case RF98_MODE_SLEEP:
writeRegister( Channel, REG_OPMODE, newMode );
currentMode = newMode;
// LogMessage("Changing to Sleep Mode\n");
break;
case RF98_MODE_STANDBY:
writeRegister( Channel, REG_OPMODE, newMode );
currentMode = newMode;
// LogMessage("Changing to Standby Mode\n");
break;
default:
return;
}
if ( newMode != RF98_MODE_SLEEP )
{
while ( digitalRead( Config.LoRaDevices[Channel].DIO5 ) == 0 )
{
}
// delay(1);
}
// LogMessage("Mode Change Done\n");
return;
}
void setFrequency( int Channel, double Frequency )
{
unsigned long FrequencyValue;
char FrequencyString[10];
// Format frequency as xxx.xxx.x Mhz
sprintf( FrequencyString, "%8.4lf ", Frequency );
FrequencyString[8] = FrequencyString[7];
FrequencyString[7] = '.';
FrequencyValue = ( unsigned long ) ( Frequency * 7110656 / 434 );
writeRegister( Channel, 0x06, ( FrequencyValue >> 16 ) & 0xFF ); // Set frequency
writeRegister( Channel, 0x07, ( FrequencyValue >> 8 ) & 0xFF );
writeRegister( Channel, 0x08, FrequencyValue & 0xFF );
Config.LoRaDevices[Channel].activeFreq = Frequency;
// LogMessage("Set Frequency to %lf\n", Frequency);
ChannelPrintf( Channel, 1, 1, "Channel %d %s MHz ", Channel, FrequencyString );
}
void setLoRaMode( int Channel )
{
// LogMessage("Setting LoRa Mode\n");
setMode( Channel, RF98_MODE_SLEEP );
writeRegister( Channel, REG_OPMODE, 0x80 );
setMode( Channel, RF98_MODE_SLEEP );
// LogMessage("Set Default Frequency\n");
setFrequency( Channel, Config.LoRaDevices[Channel].Frequency);
}
int IntToSF(int Value)
{
return Value << 4;
}
int SFToInt(int SpreadingFactor)
{
return SpreadingFactor >> 4;
}
int IntToEC(int Value)
{
return (Value - 4) << 1;
}
int ECToInt(int ErrorCoding)
{
return (ErrorCoding >> 1) + 4;
}
int DoubleToBandwidth(double Bandwidth)
{
int i;
for (i=0; i<10; i++)
{
if (abs(Bandwidth - Bandwidths[i].Bandwidth) < (Bandwidths[i].Bandwidth/10))
{
return Bandwidths[i].LoRaValue;
}
}
return BANDWIDTH_20K8;
}
double BandwidthToDouble(int LoRaValue)
{
int i;
for (i=0; i<10; i++)
{
if (LoRaValue == Bandwidths[i].LoRaValue)
{
return Bandwidths[i].Bandwidth;
}
}
return 20.8;
}
int IntToLowOpt(int Value)
{
return Value ? 0x08 : 0;
}
int LowOptToInt(int LowOpt)
{
return LowOpt ? 1 : 0;
}
void SetLoRaParameters( int Channel, int ImplicitOrExplicit, int ErrorCoding, double Bandwidth, int SpreadingFactor, int LowDataRateOptimize )
{
writeRegister( Channel, REG_MODEM_CONFIG, ImplicitOrExplicit | IntToEC(ErrorCoding) | DoubleToBandwidth(Bandwidth));
writeRegister( Channel, REG_MODEM_CONFIG2, IntToSF(SpreadingFactor) | CRC_ON );
writeRegister( Channel, REG_MODEM_CONFIG3, 0x04 | IntToLowOpt(LowDataRateOptimize)); // 0x04: AGC sets LNA gain
writeRegister( Channel, REG_DETECT_OPT, ( readRegister( Channel, REG_DETECT_OPT ) & 0xF8 ) | ( ( SpreadingFactor == 6 ) ? 0x05 : 0x03 ) ); // 0x05 For SF6; 0x03 otherwise
writeRegister( Channel, REG_DETECTION_THRESHOLD, ( SpreadingFactor == 6 ) ? 0x0C : 0x0A ); // 0x0C for SF6, 0x0A otherwise
Config.LoRaDevices[Channel].CurrentBandwidth = Bandwidth; // Used for AFC - current bandwidth may be different to that configured (i.e. because we're using calling mode)
ChannelPrintf( Channel, 2, 1, "%s, %.2lf, SF%d, EC4:%d %s",
ImplicitOrExplicit ? "Implicit" : "Explicit",
Bandwidth,
SpreadingFactor,
ErrorCoding,
LowDataRateOptimize ? "LDRO" : "" );
}
void SetDefaultLoRaParameters( int Channel )
{
// LogMessage("Set Default Parameters\n");
SetLoRaParameters( Channel,
Config.LoRaDevices[Channel].ImplicitOrExplicit,
Config.LoRaDevices[Channel].ErrorCoding,
Config.LoRaDevices[Channel].Bandwidth,
Config.LoRaDevices[Channel].SpreadingFactor,
Config.LoRaDevices[Channel].LowDataRateOptimize );
}
/////////////////////////////////////
// Method: Setup to receive continuously
//////////////////////////////////////
void
startReceiving( int Channel )
{
writeRegister( Channel, REG_DIO_MAPPING_1, 0x00 ); // 00 00 00 00 maps DIO0 to RxDone
writeRegister( Channel, REG_PAYLOAD_LENGTH, 255 );
writeRegister( Channel, REG_RX_NB_BYTES, 255 );
writeRegister( Channel, REG_FIFO_RX_BASE_AD, 0 );
writeRegister( Channel, REG_FIFO_ADDR_PTR, 0 );
// Setup Receive Continous Mode
setMode( Channel, RF98_MODE_RX_CONTINUOUS );
}
void ReTune( int Channel, double FreqShift )
{
setMode( Channel, RF98_MODE_SLEEP );
LogMessage( "Retune by %.1lfkHz\n", FreqShift * 1000 );
setFrequency( Channel, Config.LoRaDevices[Channel].activeFreq + FreqShift );
startReceiving( Channel );
}
void SendLoRaData(int Channel, char *buffer, int Length)
{
unsigned char data[257];
int i;
// Change frequency for the uplink ?
if (Config.LoRaDevices[Channel].UplinkFrequency > 0)
{
LogMessage("Change frequency to %.3lfMHz\n", Config.LoRaDevices[Channel].UplinkFrequency);
setFrequency(Channel, Config.LoRaDevices[Channel].UplinkFrequency);
}
// Change mode for the uplink ?
if (Config.LoRaDevices[Channel].UplinkMode >= 0)
{
int UplinkMode;
UplinkMode = Config.LoRaDevices[Channel].UplinkMode;
LogMessage("Change LoRa mode to %d\n", Config.LoRaDevices[Channel].UplinkMode);
SetLoRaParameters(Channel,
LoRaModes[UplinkMode].ImplicitOrExplicit,
ECToInt(LoRaModes[UplinkMode].ErrorCoding),
BandwidthToDouble(LoRaModes[UplinkMode].Bandwidth),
SFToInt(LoRaModes[UplinkMode].SpreadingFactor),
0);
}
LogMessage( "LoRa Channel %d Sending %d bytes\n", Channel, Length );
Config.LoRaDevices[Channel].Sending = 1;
setMode( Channel, RF98_MODE_STANDBY );
writeRegister( Channel, REG_DIO_MAPPING_1, 0x40 ); // 01 00 00 00 maps DIO0 to TxDone
writeRegister( Channel, REG_FIFO_TX_BASE_AD, 0x00 ); // Update the address ptr to the current tx base address
writeRegister( Channel, REG_FIFO_ADDR_PTR, 0x00 );
data[0] = REG_FIFO | 0x80;
for ( i = 0; i < Length; i++ )
{
data[i + 1] = buffer[i];
}
wiringPiSPIDataRW( Channel, data, Length + 1 );
// Set the length. For implicit mode, since the length needs to match what the receiver expects, we have to set a value which is 255 for an SSDV packet
writeRegister( Channel, REG_PAYLOAD_LENGTH, Length );
// go into transmit mode
setMode( Channel, RF98_MODE_TX );
}
void ShowPacketCounts(int Channel)
{
if (Config.LoRaDevices[Channel].InUse)
{
ChannelPrintf( Channel, 7, 1, "Telem Packets = %d (%us) ",
Config.LoRaDevices[Channel].TelemetryCount,
Config.LoRaDevices[Channel].LastTelemetryPacketAt ? (unsigned int) (time(NULL) - Config.LoRaDevices[Channel].LastTelemetryPacketAt) : 0);
ChannelPrintf( Channel, 8, 1, "Image Packets = %d (%us) ",
Config.LoRaDevices[Channel].SSDVCount,
Config.LoRaDevices[Channel].
LastSSDVPacketAt ? ( unsigned int ) ( time( NULL ) -
Config.
LoRaDevices
[Channel].
LastSSDVPacketAt )
: 0 );
ChannelPrintf( Channel, 9, 1, "Bad CRC = %d Bad Type = %d",
Config.LoRaDevices[Channel].BadCRCCount,
Config.LoRaDevices[Channel].UnknownCount );
}
}
void ProcessUploadMessage(int Channel, char *Message)
{
// LogMessage("Ch %d: Uploaded message %s\n", Channel, Message);
}
void ProcessCallingMessage(int Channel, char *Message)
{
char Payload[16];
double Frequency;
int ImplicitOrExplicit, ErrorCoding, Bandwidth, SpreadingFactor, LowDataRateOptimize;
ChannelPrintf( Channel, 3, 1, "Calling message %d bytes ",
strlen( Message ) );
if ( sscanf( Message + 2, "%15[^,],%lf,%d,%d,%d,%d,%d",
Payload,
&Frequency,
&ImplicitOrExplicit,
&ErrorCoding,
&Bandwidth, &SpreadingFactor, &LowDataRateOptimize ) == 7 )
{
if (Config.LoRaDevices[Channel].AFC)
{
Frequency += (Config.LoRaDevices[Channel].activeFreq - Config.LoRaDevices[Channel].Frequency);
}
LogMessage( "Ch %d: Calling message, new frequency %7.3lf\n", Channel,
Frequency );
// Decoded OK
setMode( Channel, RF98_MODE_SLEEP );
// setFrequency(Channel, Config.LoRaDevices[Channel].activeFreq + );
setFrequency( Channel, Frequency );
SetLoRaParameters( Channel, ImplicitOrExplicit, ECToInt(ErrorCoding), BandwidthToDouble(Bandwidth), SFToInt(SpreadingFactor), LowOptToInt(LowDataRateOptimize));
setMode( Channel, RF98_MODE_RX_CONTINUOUS );
Config.LoRaDevices[Channel].InCallingMode = 1;
// ChannelPrintf(Channel, 1, 1, "Channel %d %7.3lfMHz ", Channel, Frequency);
}
}
size_t write_data( void *buffer, size_t size, size_t nmemb, void *userp )
{
return size * nmemb;
}
void UploadListenerTelemetry( char *callsign, float gps_lat, float gps_lon, char *antenna )
{
int time_epoch = ( int ) time( NULL );
if ( Config.EnableHabitat )
{
CURL *curl;
CURLcode res;
char PostFields[300];
char JsonData[200];
/* In windows, this will init the winsock stuff */
/* get a curl handle */
curl = curl_easy_init( );
if ( curl )
{
// So that the response to the curl POST doesn;'t mess up my finely crafted display!
curl_easy_setopt( curl, CURLOPT_WRITEFUNCTION, write_data );
// Set the URL that is about to receive our POST
curl_easy_setopt( curl, CURLOPT_URL,
"http://habitat.habhub.org/transition/listener_telemetry" );
// Now specify the POST data
sprintf( JsonData, "{\"latitude\": %f, \"longitude\": %f}",
gps_lat, gps_lon );
sprintf( PostFields, "callsign=%s&time=%d&data=%s", callsign,
time_epoch, JsonData );
curl_easy_setopt( curl, CURLOPT_POSTFIELDS, PostFields );
// Perform the request, res will get the return code
res = curl_easy_perform( curl );
// Check for errors
if ( res == CURLE_OK )
{
LogMessage( "Uploaded listener %s position %f,%f\n",
Config.Tracker, Config.latitude,
Config.longitude );
}
else
{
LogMessage( "curl_easy_perform() failed: %s\n",
curl_easy_strerror( res ) );
}
// always cleanup
curl_easy_cleanup( curl );
}
/* In windows, this will init the winsock stuff */
/* get a curl handle */
curl = curl_easy_init( );
if ( curl )
{
// So that the response to the curl POST doesn;'t mess up my finely crafted display!
curl_easy_setopt( curl, CURLOPT_WRITEFUNCTION, write_data );
// Set the URL that is about to receive our POST
curl_easy_setopt( curl, CURLOPT_URL,
"http://habitat.habhub.org/transition/listener_information" );
// Now specify the POST data
sprintf( JsonData, "{\"radio\": \"%s\", \"antenna\": \"%s\"}",
"LoRa RFM98W", antenna );
sprintf( PostFields, "callsign=%s&time=%d&data=%s", Config.Tracker, time_epoch, JsonData );
curl_easy_setopt( curl, CURLOPT_POSTFIELDS, PostFields );
// Perform the request, res will get the return code
res = curl_easy_perform( curl );
// Check for errors
if ( res != CURLE_OK )
{
LogMessage( "curl_easy_perform() failed: %s\n",
curl_easy_strerror( res ) );
}
// always cleanup
curl_easy_cleanup( curl );
}
}
}
void RemoveOldPayloads(void)
{
int i;
for (i=0; i<MAX_PAYLOADS; i++)
{
if (Config.Payloads[i].InUse)
{
if ((time(NULL) - Config.Payloads[i].LastPacketAt) > 10800)
{
// More than 3 hours old, so remove it
}
Config.Payloads[i].InUse = 0;
}
}
}
int FindFreePayload(char *Payload)
{
int i, Oldest;
// First pass - find match for payload
for (i=0; i<MAX_PAYLOADS; i++)
{
if (Config.Payloads[i].InUse)
{
if (strcmp(Payload, Config.Payloads[i].Payload) == 0)
{
return i;
}
}
}
// Second pass - just find a free position
for (i=0; i<MAX_PAYLOADS; i++)
{
if (!Config.Payloads[i].InUse)
{
Config.Payloads[i].InUse = 1;
strcpy(Config.Payloads[i].Payload, Payload);
return i;
}
}
// Third pass - find oldest payload
Oldest = 0;
for (i=1; i<MAX_PAYLOADS; i++)
{
if (Config.Payloads[i].LastPositionAt < Config.Payloads[Oldest].LastPositionAt)
{
Oldest = i;
}
}
strcpy(Config.Payloads[Oldest].Payload, Payload);
return i;
}
void DoPositionCalcs(int PayloadIndex)
{
unsigned long Now;
struct tm tm;
float Climb, Period;
strptime(Config.Payloads[PayloadIndex].Time, "%H:%M:%S", &tm);
Now = tm.tm_hour * 3600 + tm.tm_min * 60 + tm.tm_sec;
if ((Config.Payloads[PayloadIndex].LastPositionAt > 0 )
&& ( Now > Config.Payloads[PayloadIndex].LastPositionAt ) )
{
Climb = (float)Config.Payloads[PayloadIndex].Altitude - (float)Config.Payloads[PayloadIndex].PreviousAltitude;
Period = (float)Now - (float)Config.Payloads[PayloadIndex].LastPositionAt;
Config.Payloads[PayloadIndex].AscentRate = Climb / Period;
}
else
{
Config.Payloads[PayloadIndex].AscentRate = 0;
}
Config.Payloads[PayloadIndex].LastPositionAt = Now;
Config.Payloads[PayloadIndex].PreviousAltitude = Config.Payloads[PayloadIndex].Altitude;
}
void ProcessLine(int Channel, char *Line)
{
int PayloadIndex;
char Payload[32];
// Find free position for this payload
sscanf(Line + 2, "%31[^,]", Payload);
PayloadIndex = FindFreePayload(Payload);
// Store sentence against this payload
strcpy(Config.Payloads[PayloadIndex].Telemetry, Line);
// Fill in source channel
Config.Payloads[PayloadIndex].Channel = Channel;
// Parse key fields from sentence
sscanf( Line + 2, "%15[^,],%u,%8[^,],%lf,%lf,%u",
(Config.Payloads[PayloadIndex].Payload),
&(Config.Payloads[PayloadIndex].Counter),
(Config.Payloads[PayloadIndex].Time),
&(Config.Payloads[PayloadIndex].Latitude),
&(Config.Payloads[PayloadIndex].Longitude),
&(Config.Payloads[PayloadIndex].Altitude));
// Mark when this was received, so we can time-out old payloads
Config.Payloads[PayloadIndex].LastPacketAt = time(NULL);
// Ascent rate
DoPositionCalcs(PayloadIndex);
// Update display
ChannelPrintf(Channel, 4, 1, "%8.5lf, %8.5lf, %05u ",
Config.Payloads[PayloadIndex].Latitude,
Config.Payloads[PayloadIndex].Longitude,
Config.Payloads[PayloadIndex].Altitude);
}
void ProcessTelemetryMessage(int Channel, char *Message)
{
if (strlen(Message + 1) < 250)
{
char *startmessage, *endmessage;
ChannelPrintf( Channel, 3, 1, "Telemetry %d bytes ", strlen( Message + 1 ) );
startmessage = Message;
endmessage = strchr( startmessage, '\n' );
while ( endmessage != NULL )
{
int Repeated;
habitate_telem_packets++;
time_t now;
struct tm *tm;
*endmessage = '\0';
LogTelemetryPacket(startmessage);
if ((Repeated = (*startmessage == '%')))
{
*startmessage = '$';
}
ProcessLine(Channel, startmessage);
now = time( 0 );
tm = localtime( &now );
if ( Config.EnableHabitat )
{
// Create a telemetry packet
telemetry_t t;
t.Channel = Channel;
t.Packet_Number = habitate_telem_packets;
memcpy( t.Telemetry, startmessage, strlen( startmessage ) + 1 );
// Add the telemetry packet to the pipe
int result = write( telem_pipe_fd[1], &t, sizeof( t ) );
if ( result == -1 )
{
exit_error("Error writing to the telemetry pipe\n");
}
if ( result == 0 )
{
LogMessage( "Nothing written to telemetry pipe \n" );
}
if ( result > 1 )
{
htsv.packet_count++;
}
}
Config.LoRaDevices[Channel].TelemetryCount++;
LogMessage("%02d:%02d:%02d Ch%d: %s%s\n", tm->tm_hour, tm->tm_min, tm->tm_sec, Channel, startmessage, Repeated ? " (repeated)" : "");
startmessage = endmessage + 1;
endmessage = strchr( startmessage, '\n' );
}
Config.LoRaDevices[Channel].LastTelemetryPacketAt = time( NULL );
}
}
static char *decode_callsign( char *callsign, uint32_t code )
{
char *c, s;
*callsign = '\0';
/* Is callsign valid? */
if ( code > 0xF423FFFF )
return ( callsign );
for ( c = callsign; code; c++ )
{
s = code % 40;
if ( s == 0 )
*c = '-';
else if ( s < 11 )
*c = '0' + s - 1;
else if ( s < 14 )
*c = '-';
else