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rw8610.c
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rw8610.c
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/* open8610 - rw8610.c library functions
* This is a library of functions common to Linux and Windows
*
* Version 0.11
*
* Control WS8610 weather station
*
* Copyright 2003-2005, Kenneth Lavrsen, Grzegorz Wisniewski, Sander Eerkes
* 2006-7 Phil Rayner & Portions by Laurent Chauvin
* 2011 Emanuele Iannone
*
* This program is published under the GNU General Public license
*/
#include "rw8610.h"
//calibration value for nanodelay function
float spins_per_ns;
//configuration data, global variable for easy availability in many function
struct config_type config;
//some constants defined as array for easy use
static int history_record_length[] = {10,13,15};
static int max_history_record[] = {
HISTORY_BUFFER_SIZE / 10,
HISTORY_BUFFER_SIZE / 13,
HISTORY_BUFFER_SIZE / 15
};
/********************************************************************/
/* temperature_conv
* Converts temperature according to configuration settings
*
* Input: temp_celcius - temperature in Celcius
*
* Returns: Temperature (deg C or F)
*
********************************************************************/
double temperature_conv(double temp_celcius)
{
if (config.temperature_conv)
return temp_celcius * 9 / 5 + 32;
else
return temp_celcius;
}
/********************************************************************/
/* temp2str
* Converts temperature into a string according to format and validity
*
* Input: temp - temperature, frmt - format, str - result
*
* Returns: pointer to updated string
*
********************************************************************/
char *temp2str(double temp, char *frmt, char *str)
{
if (temp == 81.0)
strcpy(str, "-");
else
sprintf(str, frmt, temp);
return str;
}
/********************************************************************/
/* RH2str
* Converts humidity into a string according to format and validity
*
* Input: RH - humidity, frmt - format, str - result
*
* Returns: pointer to updated string
*
********************************************************************/
char *RH2str(int RH, char *frmt, char *str)
{
if (RH == 110)
strcpy(str, "-");
else
sprintf(str, frmt, RH);
return str;
}
/********************************************************************/
/* current_timestamp
* Read the currently stored timestamp
*
* Input: Handle to weatherstation
*
* Returns: seconds since 1/1/70 or -1 if read error
********************************************************************/
time_t current_timestamp(WEATHERSTATION ws)
{
unsigned char tempdata[6];
struct tm t;
if (read_safe(ws, 0, 6, tempdata) == -1) return -1;
t.tm_isdst = -1;
t.tm_sec = 0;
t.tm_min = (tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF);
t.tm_hour = (tempdata[1] >> 4) * 10 + (tempdata[1] & 0xF);
t.tm_mday = (tempdata[2] >> 4) + (tempdata[3] & 0xF) * 10;
t.tm_mon = (tempdata[3] >> 4) + (tempdata[4] & 0xF) * 10 - 1;
t.tm_year = (tempdata[4] >> 4) + (tempdata[5] & 0xF) * 10 + 100;
return mktime(&t);
}
/********************************************************************/
/* outdoor_count
* Return the count of additional outdoor unit (1 is the minimum)
*
* Input: Handle to weatherstation
*
* Returns: 0,1 or 2 (# of additional unit) or -1 (error)
********************************************************************/
int outdoor_count(WEATHERSTATION ws)
{
unsigned char tempdata[1];
if (read_safe(ws, 0x0C, 1, tempdata) == -1) return -1;
return (tempdata[0] - 1);
}
/********************************************************************/
/* get_history_record_length
* Return the size of a record depending on the count of add sensors
*
* Input: additional outdoor sensors count
*
* Returns: length of corresponding record
********************************************************************/
int get_history_record_length(int outdoor_count)
{
return (history_record_length[outdoor_count]);
}
/********************************************************************/
/* hist_mins
* Read minutes from the timestamp of a record
*
* Input: data - pointer to data buffer
*
* Returns: minutes
********************************************************************/
int hist_mins(unsigned char *data)
{
int address=0x00; /* at the start of the stored byte */
unsigned char *tempdata = data + address;
return ((tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF));
}
/********************************************************************/
/* hist_hours
* Read hours from the timestamp of a record
*
* Input: data - pointer to data buffer
*
* Returns: hours
********************************************************************/
int hist_hours(unsigned char *data)
{
int address=0x01; /* 1 byte on from the start of the stored byte */
unsigned char *tempdata = data + address;
return ((tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF));
}
/********************************************************************/
/* history_length
* Read the bytes which give the no of samples held in memory
*
* Input: data - pointer to data buffer
*
* Returns: history length
********************************************************************/
int history_length(unsigned char *data)
{
int address=0x00; /* dummy val */
unsigned char *tempdata = data + address;
return ((tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF) +(tempdata[1] >> 4) * 1000 + (tempdata[1] & 0xF) * 100);
}
/********************************************************************/
/* temperature_indoor
* Read indoor temperature from a record
*
* Input: data - pointer to data buffer
*
* Returns: Temperature (deg C if temperature_conv is 0)
* (deg F if temperature_conv is 1)
*
********************************************************************/
double temperature_indoor(unsigned char *data)
{
int address=0x05; /* 5 bytes on from the start of the stored byte */
unsigned char *tempdata = data + address;
return temperature_conv(((tempdata[1] & 0xF) * 10 +
(tempdata[0] >> 4) + (tempdata[0] & 0xF) / 10.0) - 30.0);
}
/********************************************************************/
/* temperature_indoor_minmax
* Read indoor min/max temperatures with timestamps
*
* Input: Handle to weatherstation
* temperature_conv flag (integer) controlling
* convertion to deg F
*
* Output: Temperatures temp_min and temp_max
* (deg C if temperature_conv is 0)
* (deg F if temperature_conv is 1)
* Timestamps for temp_min and temp_max in pointers to
* timestamp structures for time_min and time_max
*
********************************************************************/
void temperature_indoor_minmax(unsigned char *data,
double *temp_min,
double *temp_max,
struct timestamp *time_min,
struct timestamp *time_max)
{
int address_min=0x28;
int address_max=0x2B;
int address_mintime=0x2C;
int address_maxtime=0x31;
unsigned char *tempdata = data + address_min;
*temp_min = temperature_conv(((tempdata[1] >> 4) * 10 + (tempdata[1] & 0xF) +
(tempdata[0] >> 4) / 10.0 ) - 30.0);
tempdata = data + address_max;
*temp_max = temperature_conv(((tempdata[1] & 0xF) * 10 +
(tempdata[0] >> 4) + (tempdata[0] & 0xF) / 10.0) - 30.0);
tempdata = data + address_mintime;
if (time_min != NULL)
{
time_min->minute = (tempdata[0] >> 4) + (tempdata[1] & 0xF) * 10;
time_min->hour = (tempdata[1] >> 4) + (tempdata[2] & 0xF) * 10;
time_min->day = (tempdata[2] >> 4) + (tempdata[3] & 0xF) * 10;
time_min->month = (tempdata[3] >> 4) + (tempdata[4] & 0xF) * 10;
time_min->year = 2000 + (tempdata[4] >> 4) + (tempdata[5] & 0xF) * 10;
}
tempdata = data + address_maxtime;
if (time_max != NULL)
{
time_max->minute = (tempdata[0] >> 4) + (tempdata[1] & 0xF) * 10;
time_max->hour = (tempdata[1] >> 4) + (tempdata[2] & 0xF) * 10;
time_max->day = (tempdata[2] >> 4) + (tempdata[3] & 0xF) * 10;
time_max->month = (tempdata[3] >> 4) + (tempdata[4] & 0xF) * 10;
time_max->year = 2000 + (tempdata[4] >> 4) + (tempdata[5] & 0xF) * 10;
}
return;
}
/********************************************************************/
/* temperature_outdoor
* Read outdoor temperature from a record
*
* Input: data - pointer to data buffer
*
* Returns: Temperature (deg C if temperature_conv is 0)
* (deg F if temperature_conv is 1)
*
********************************************************************/
double temperature_outdoor(unsigned char *data)
{
int address=0x06; /* 6 bytes on from start byte of each history recrd */
unsigned char *tempdata = data + address;
return temperature_conv(((tempdata[1] & 0xF) +
(tempdata[1] >> 4) * 10 + (tempdata[0] >> 4) / 10.0) - 30.0);
}
/********************************************************************/
/* temperature_outdoor2
* Read second outdoor temperature from a record
*
* Input: data - pointer to data buffer
*
* Returns: Temperature (deg C if temperature_conv is 0)
* (deg F if temperature_conv is 1)
*
********************************************************************/
double temperature_outdoor2(unsigned char *data)
{
int address=0x0A; /* 10 bytes on from start byte of each history recrd */
unsigned char *tempdata = data + address;
return temperature_conv(((tempdata[1] & 0xF) * 10 +
(tempdata[0] >> 4) + (tempdata[0] & 0xF) / 10.0) - 30.0);
}
/********************************************************************/
/* temperature_outdoor3
* Read third outdoor temperature from a record
*
* Input: data - pointer to data buffer
*
* Returns: Temperature (deg C if temperature_conv is 0)
* (deg F if temperature_conv is 1)
*
********************************************************************/
double temperature_outdoor3(unsigned char *data)
{
int address=0x0C; /* 12 bytes on from start byte of each history recrd */
unsigned char *tempdata = data + address;
return temperature_conv(((tempdata[1] & 0xF) +
(tempdata[1] >> 4) * 10 + (tempdata[0] >> 4) / 10.0) - 30.0);
}
/********************************************************************
* temperature_outdoor_minmax
* Read outdoor min/max temperatures with timestamps
*
* Input: Handle to weatherstation
* temperature_conv flag (integer) controlling
* convertion to deg F
*
* Output: Temperatures temp_min and temp_max
* (deg C if temperature_conv is 0)
* (deg F if temperature_conv is 1)
* Timestamps for temp_min and temp_max in pointers to
* timestamp structures for time_min and time_max
*
********************************************************************/
void temperature_outdoor_minmax(unsigned char *data,
double *temp_min,
double *temp_max,
struct timestamp *time_min,
struct timestamp *time_max)
{
int address_min=0x3F;
int address_max=0x42;
int address_mintime=0x43;
int address_maxtime=0x48;
unsigned char *tempdata = data + address_min;
*temp_min = temperature_conv(((tempdata[1] >> 4) * 10 + (tempdata[1] & 0xF) +
(tempdata[0] >> 4) / 10.0 ) - 30.0);
tempdata = data + address_max;
*temp_max = temperature_conv(((tempdata[1] & 0xF) * 10 +
(tempdata[0] >> 4) + (tempdata[0] & 0xF) / 10.0) - 30.0);
tempdata = data + address_mintime;
if (time_min != NULL)
{
time_min->minute = (tempdata[0] >> 4) + (tempdata[1] & 0xF) * 10;
time_min->hour = (tempdata[1] >> 4) + (tempdata[2] & 0xF) * 10;
time_min->day = (tempdata[2] >> 4) + (tempdata[3] & 0xF) * 10;
time_min->month = (tempdata[3] >> 4) + (tempdata[4] & 0xF) * 10;
time_min->year = 2000 + (tempdata[4] >> 4) + (tempdata[5] & 0xF) * 10;
}
tempdata = data + address_maxtime;
if (time_max != NULL)
{
time_max->minute = (tempdata[0] >> 4) + (tempdata[1] & 0xF) * 10;
time_max->hour = (tempdata[1] >> 4) + (tempdata[2] & 0xF) * 10;
time_max->day = (tempdata[2] >> 4) + (tempdata[3] & 0xF) * 10;
time_max->month = (tempdata[3] >> 4) + (tempdata[4] & 0xF) * 10;
time_max->year = 2000 + (tempdata[4] >> 4) + (tempdata[5] & 0xF) * 10;
}
return;
}
/********************************************************************
* dewpoint
* Read dewpoint, current value only
*
* Input: data - pointer to data buffer
*
* Returns: Dewpoint
*
*
********************************************************************/
double dewpoint(unsigned char *data)
{
int address=0x6B;
unsigned char *tempdata = data + address;
return temperature_conv(((tempdata[1] & 0xF) * 10 +
(tempdata[0] >> 4) + (tempdata[0] & 0xF) / 10.0) - 30.0);
}
/********************************************************************
* dewpoint_minmax
* Read outdoor min/max dewpoint with timestamps
*
* Input: Handle to weatherstation
* temperature_conv flag (integer) controlling
* convertion to deg F
*
* Output: Dewpoints dp_min and dp_max
* (deg C if temperature_conv is 0),
* (deg F if temperature_conv is 1)
* Timestamps for dp_min and dp_max in pointers to
* timestamp structures for time_min and time_max
*
********************************************************************/
void dewpoint_minmax(unsigned char *data,
double *dp_min,
double *dp_max,
struct timestamp *time_min,
struct timestamp *time_max)
{
int address_min=0x6D;
int address_max=0x70;
int address_mintime=0x71;
int address_maxtime=0x76;
unsigned char *tempdata = data + address_min;
*dp_min = temperature_conv(((tempdata[1] >> 4) * 10 + (tempdata[1] & 0xF) +
(tempdata[0] >> 4) / 10.0 ) - 30.0);
tempdata = data + address_max;
*dp_max = temperature_conv(((tempdata[1] & 0xF) * 10 +
(tempdata[0] >> 4) + (tempdata[0] & 0xF) / 10.0) - 30.0);
tempdata = data + address_mintime;
if (time_min != NULL)
{
time_min->minute = (tempdata[0] >> 4) + (tempdata[1] & 0xF) * 10;
time_min->hour = (tempdata[1] >> 4) + (tempdata[2] & 0xF) * 10;
time_min->day = (tempdata[2] >> 4) + (tempdata[3] & 0xF) * 10;
time_min->month = (tempdata[3] >> 4) + (tempdata[4] & 0xF) * 10;
time_min->year = 2000 + (tempdata[4] >> 4) + (tempdata[5] & 0xF) * 10;
}
tempdata = data + address_maxtime;
if (time_max != NULL)
{
time_max->minute = (tempdata[0] >> 4) + (tempdata[1] & 0xF) * 10;
time_max->hour = (tempdata[1] >> 4) + (tempdata[2] & 0xF) * 10;
time_max->day = (tempdata[2] >> 4) + (tempdata[3] & 0xF) * 10;
time_max->month = (tempdata[3] >> 4) + (tempdata[4] & 0xF) * 10;
time_max->year = 2000 + (tempdata[4] >> 4) + (tempdata[5] & 0xF) * 10;
}
return;
}
/********************************************************************
* humidity_indoor
* Read indoor relative humidity, current value only
*
* Input: Handle to weatherstation
* Returns: relative humidity in percent (integer)
*
********************************************************************/
int humidity_indoor(unsigned char *data)
{
int address=0x08;
unsigned char *tempdata = data + address;
return ((tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF));
}
/********************************************************************
* humidity_indoor_minmax
* Read min/max values with timestamps
*
* Input: Handle to weatherstation
* Output: Relative humidity in % hum_min and hum_max (integers)
* Timestamps for hum_min and hum_max in pointers to
* timestamp structures for time_min and time_max
* Returns: releative humidity current value in % (integer)
*
********************************************************************/
void humidity_indoor_minmax(unsigned char *data,
int *hum_min,
int *hum_max,
struct timestamp *time_min,
struct timestamp *time_max)
{
int address_min = 0x82;
int address_max = 0x83;
int address_mintime = 0x84;
int address_maxtime = 0x89;
unsigned char *tempdata = data + address_min;
if (hum_min != NULL)
*hum_min = (tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF);
tempdata = data + address_max;
if (hum_max != NULL)
*hum_max = (tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF);
tempdata = data + address_mintime;
if (time_min != NULL)
{
time_min->minute = ((tempdata[0] >> 4) * 10) + (tempdata[0] & 0xF);
time_min->hour = ((tempdata[1] >> 4) * 10) + (tempdata[1] & 0xF);
time_min->day = ((tempdata[2] >> 4) * 10) + (tempdata[2] & 0xF);
time_min->month = ((tempdata[3] >> 4) * 10) + (tempdata[3] & 0xF);
time_min->year = 2000 + ((tempdata[4] >> 4) * 10) + (tempdata[4] & 0xF);
}
tempdata = data + address_maxtime;
if (time_max != NULL)
{
time_max->minute = ((tempdata[0] >> 4) * 10) + (tempdata[0] & 0xF);
time_max->hour = ((tempdata[1] >> 4) * 10) + (tempdata[1] & 0xF);
time_max->day = ((tempdata[2] >> 4) * 10) + (tempdata[2] & 0xF);
time_max->month = ((tempdata[3] >> 4) * 10) + (tempdata[3] & 0xF);
time_max->year = 2000 + ((tempdata[4] >> 4) * 10) + (tempdata[4] & 0xF);
}
return;
}
/********************************************************************
* humidity_outdoor
* Read relative humidity, current value only
*
* Input: data - pointer to data buffer
* Returns: relative humidity in percent (integer)
*
********************************************************************/
int humidity_outdoor(unsigned char *data)
{
int address=0x09;
unsigned char *tempdata = data + address;
return ((tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF));
}
/********************************************************************
* humidity_outdoor2
* Read relative humidity, current value only
*
* Input: data - pointer to data buffer
* Returns: relative humidity in percent (integer)
*
********************************************************************/
int humidity_outdoor2(unsigned char *data)
{
int address=0x0B;
unsigned char *tempdata = data + address;
return ((tempdata[0] >> 4) + (tempdata[1] & 0xF) * 10);
}
/********************************************************************
* humidity_outdoor3
* Read relative humidity, current value only
*
* Input: data - pointer to data buffer
* Returns: relative humidity in percent (integer)
*
********************************************************************/
int humidity_outdoor3(unsigned char *data)
{
int address=0x0E;
unsigned char *tempdata = data + address;
return ((tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF));
}
/********************************************************************
* humidity_outdoor_minmax
* Read min/max values with timestamps
*
* Input: Handle to weatherstation
* Output: Relative humidity in % hum_min and hum_max (integers)
* Timestamps for hum_min and hum_max in pointers to
* timestamp structures for time_min and time_max
*
* Returns: releative humidity current value in % (integer)
*
********************************************************************/
void humidity_outdoor_minmax(unsigned char *data,
int *hum_min,
int *hum_max,
struct timestamp *time_min,
struct timestamp *time_max)
{
int address_min = 0x91;
int address_max = 0x92;
int address_mintime = 0x93;
int address_maxtime = 0x98;
unsigned char *tempdata = data + address_min;
if (hum_min != NULL)
*hum_min = (tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF);
tempdata = data + address_max;
if (hum_max != NULL)
*hum_max = (tempdata[0] >> 4) * 10 + (tempdata[0] & 0xF);
tempdata = data + address_mintime;
if (time_min != NULL)
{
time_min->minute = ((tempdata[0] >> 4) * 10) + (tempdata[0] & 0xF);
time_min->hour = ((tempdata[1] >> 4) * 10) + (tempdata[1] & 0xF);
time_min->day = ((tempdata[2] >> 4) * 10) + (tempdata[2] & 0xF);
time_min->month = ((tempdata[3] >> 4) * 10) + (tempdata[3] & 0xF);
time_min->year = 2000 + ((tempdata[4] >> 4) * 10) + (tempdata[4] & 0xF);
}
tempdata = data + address_maxtime;
if (time_max != NULL)
{
time_max->minute = ((tempdata[0] >> 4) * 10) + (tempdata[0] & 0xF);
time_max->hour = ((tempdata[1] >> 4) * 10) + (tempdata[1] & 0xF);
time_max->day = ((tempdata[2] >> 4) * 10) + (tempdata[2] & 0xF);
time_max->month = ((tempdata[3] >> 4) * 10) + (tempdata[3] & 0xF);
time_max->year = 2000 + ((tempdata[4] >> 4) * 10) + (tempdata[4] & 0xF);
}
return;
}
/********************************************************************
* read_history_record
* Read the history information like time
* of last record, pointer to last record.
*
* Input: Handle to weatherstation
* record - record index number to be read [0x00-0xAE]
* hr - pointer to history_record structure
* outdoor_count - count of additional external sensor
*
* Output: history record
*
********************************************************************/
int read_history_record(WEATHERSTATION ws, int record_no, struct history_record *hr, int outdoor_count) {
unsigned char record[16];
struct tm t;
while (record_no >= max_history_record[outdoor_count]) record_no -= max_history_record[outdoor_count];
if (read_safe(ws, HISTORY_BUFFER_ADR + history_record_length[outdoor_count] * record_no,
history_record_length[outdoor_count], record) != history_record_length[outdoor_count])
read_error_exit();
else {
int i;
char str[256];
sprintf(str, "%d additional sensor(s), record length is %d, max record count is %d", outdoor_count,
history_record_length[outdoor_count], max_history_record[outdoor_count]);
print_log(2, str);
sprintf(str, "Reading record %d at 0x%x: ", record_no,
HISTORY_BUFFER_ADR + history_record_length[outdoor_count] * record_no);
for (i = 0; i < history_record_length[outdoor_count]; i++)
sprintf(str, "%s%02X ", str, record[i]);
print_log(2, str);
}
t.tm_isdst = -1;
t.tm_sec = 0;
t.tm_min = (record[0] >> 4) * 10 + (record[0] & 0xF);
t.tm_hour = (record[1] >> 4) * 10 + (record[1] & 0xF);
t.tm_mday = (record[2] >> 4) * 10 + (record[2] & 0xF);
t.tm_mon = (record[3] >> 4) * 10 + (record[3] & 0xF) - 1;
t.tm_year = (record[4] >> 4) * 10 + (record[4] & 0xF) + 100;
hr->time_stamp = mktime(&t);
hr->Temp[0] = temperature_indoor(record);
hr->Temp[1] = temperature_outdoor(record);
hr->Temp[2] = temperature_outdoor2(record);
hr->Temp[3] = temperature_outdoor3(record);
hr->RH[0] = humidity_indoor(record);
hr->RH[1] = humidity_outdoor(record);
hr->RH[2] = humidity_outdoor2(record);
hr->RH[3] = humidity_outdoor3(record);
return 0;
}
/********************************************************************
* read_last_history_record
* Read the last history record
*
* Input: Handle to weatherstation
* hr - pointer to history_record structure
* outdoor_count - count of additional external sensor
*
* Output: last history record
*
********************************************************************/
int read_last_history_record(WEATHERSTATION ws, struct history_record *hr, int outdoor_count) {
time_t current_t;
int last_record_no;
unsigned char n_record;
char str[256];
read_history_record(ws, 0, hr, outdoor_count);
current_t = current_timestamp(ws);
last_record_no = (current_t - hr->time_stamp) / 300;
sprintf(str, "Diff: %d records", last_record_no);
print_log(2, str);
sprintf(str, "Date record0: %s", ctime(&(hr->time_stamp)));
str[strlen(str) - 1] = 0;
print_log(2, str);
sprintf(str, "Date current: %s", ctime(¤t_t));
str[strlen(str) - 1] = 0;
print_log(2, str);
// Try to see if record (n+1) is valid
if (read_safe(ws, HISTORY_BUFFER_ADR + history_record_length[outdoor_count] * (last_record_no +1), 1, &n_record) != 1)
read_error_exit();
sprintf(str, "Next record start with 0x%02X", (int) n_record);
// If valid then read one record ahead
if (n_record != 0xFF) {
sprintf(str, "%s, seems valid, skipping to it", str);
last_record_no++;
} else sprintf(str, "%s, stick with current record", str);
print_log(2, str);
return read_history_record(ws, last_record_no, hr, outdoor_count);
}
/********************************************************************
* read_error_exit
* exit location for all calls to read_safe for error exit.
* includes error reporting.
*
********************************************************************/
void read_error_exit(void)
{
perror("read_safe() error");
exit(0);
}
/********************************************************************
* write_error_exit
* exit location for all calls to write_safe for error exit.
* includes error reporting.
*
********************************************************************/
void write_error_exit(void)
{
perror("write_safe() error");
exit(0);
}
/********************************************************************
* get_configuration()
*
* read setup parameters from ws8610.conf
* It searches in this sequence:
* 1. Path to config file including filename given as parameter
* 2. ./open8610.conf
* 3. /usr/local/etc/open8610.conf
* 4. /etc/open8610.conf
*
* See file open8610.conf-dist for the format and option names/values
*
* input: config file name with full path - pointer to string
*
* output: struct config populated with valid settings either
* from config file or defaults
*
* returns: 0 = OK
* -1 = no config file or file open error
*
********************************************************************/
int get_configuration(struct config_type *config, char *path)
{
FILE *fptr;
char inputline[1000] = "";
char token[100] = "";
char val[100] = "";
char val2[100] = "";
// First we set everything to defaults - faster than many if statements
strcpy(config->serial_device_name, DEFAULT_SERIAL_DEVICE); // Name of serial device
strcpy(config->citizen_weather_id, "CW0000"); // Citizen Weather ID
strcpy(config->citizen_weather_latitude, "5540.12N"); // latitude default Glostrup, DK
strcpy(config->citizen_weather_longitude, "01224.60E"); // longitude default, Glostrup, DK
strcpy(config->aprs_host[0].name, "aprswest.net"); // host1 name
config->aprs_host[0].port = 23; // host1 port
strcpy(config->aprs_host[1].name, "indiana.aprs2.net"); // host2 name
config->aprs_host[1].port = 23; // host2 port
config->num_hosts = 2; // default number of defined hosts
strcpy(config->weather_underground_id, "WUID"); // Weather Underground ID
strcpy(config->weather_underground_password, "WUPassword"); // Weather Underground Password
strcpy(config->timezone, "1"); // Timezone, default CET
config->wind_speed_conv_factor = 1.0; // Speed dimention, m/s is default
config->temperature_conv = 0; // Temperature in Celcius
config->rain_conv_factor = 1.0; // Rain in mm
config->pressure_conv_factor = 1.0; // Pressure in hPa (same as millibar)
strcpy(config->mysql_host, "localhost"); // localhost, IP or domainname of server
strcpy(config->mysql_user, "open8610"); // MySQL database user name
strcpy(config->mysql_passwd, "mysql8610"); // Password for MySQL database user
strcpy(config->mysql_database, "open8610"); // Name of MySQL database
config->mysql_port = 0; // MySQL port. 0 means default port/socket
strcpy(config->pgsql_connect, "hostaddr='127.0.0.1'dbname='open8610'user='postgres'"); // connection string
strcpy(config->pgsql_table, "weather"); // PgSQL table name
strcpy(config->pgsql_station, "open8610"); // Unique station id
config->log_level = 0;
// open the config file
fptr = NULL;
if (path != NULL)
fptr = fopen(path, "r"); //first try the parameter given
if (fptr == NULL) //then try default search
{
if ((fptr = fopen("open8610.conf", "r")) == NULL)
{
if ((fptr = fopen("/usr/local/etc/open8610.conf", "r")) == NULL)
{
if ((fptr = fopen("/etc/open8610.conf", "r")) == NULL)
{
//Give up and use defaults
return(-1);
}
}
}
}
while (fscanf(fptr, "%[^\n]\n", inputline) != EOF)
{
sscanf(inputline, "%[^= \t]%*[ \t=]%s%*[, \t]%s%*[^\n]", token, val, val2);
if (token[0] == '#') // comment
continue;
if ((strcmp(token,"SERIAL_DEVICE")==0) && (strlen(val) != 0))
{
strcpy(config->serial_device_name,val);
continue;
}
if ((strcmp(token,"CITIZEN_WEATHER_ID")==0) && (strlen(val) != 0))
{
strcpy(config->citizen_weather_id, val);
continue;
}
if ((strcmp(token,"CITIZEN_WEATHER_LATITUDE")==0) && (strlen(val)!=0))
{
strcpy(config->citizen_weather_latitude, val);
continue;
}
if ((strcmp(token,"CITIZEN_WEATHER_LONGITUDE")==0) && (strlen(val)!=0))
{
strcpy(config->citizen_weather_longitude, val);
continue;
}
if ((strcmp(token,"APRS_SERVER")==0) && (strlen(val)!=0) && (strlen(val2)!=0))
{
if ( config->num_hosts >= MAX_APRS_HOSTS)
continue; // ignore host definitions over the defined max
strcpy(config->aprs_host[config->num_hosts].name, val);
config->aprs_host[config->num_hosts].port = atoi(val2);
config->num_hosts++; // increment for next
continue;
}
if ((strcmp(token,"WEATHER_UNDERGROUND_ID")==0) && (strlen(val)!=0))
{
strcpy(config->weather_underground_id, val);
continue;
}
if ((strcmp(token,"WEATHER_UNDERGROUND_PASSWORD")==0)&&(strlen(val)!=0))
{
strcpy(config->weather_underground_password, val);
continue;
}
if ((strcmp(token,"TIMEZONE")==0) && (strlen(val) != 0))
{
strcpy(config->timezone, val);
continue;
}
if ((strcmp(token,"WIND_SPEED") == 0) && (strlen(val) != 0))
{
if (strcmp(val, "m/s") == 0)
config->wind_speed_conv_factor = METERS_PER_SECOND;
else if (strcmp(val, "km/h") == 0)
config->wind_speed_conv_factor = KILOMETERS_PER_HOUR;
else if (strcmp(val, "MPH") == 0)
config->wind_speed_conv_factor = MILES_PER_HOUR;
continue; //else default remains
}
if ((strcmp(token,"TEMPERATURE") == 0) && (strlen(val) != 0))
{
if (strcmp(val, "C") == 0)
config->temperature_conv = CELCIUS;
else if (strcmp(val, "F") == 0)
config->temperature_conv = FAHRENHEIT;
continue; //else default remains
}
if ((strcmp(token,"RAIN") == 0) && (strlen(val) != 0))
{
if (strcmp(val, "mm") == 0)
config->rain_conv_factor = MILLIMETERS;
else if (strcmp(val, "IN") == 0)
config->rain_conv_factor = INCHES;
continue; //else default remains
}
if ((strcmp(token,"PRESSURE") == 0) && (strlen(val) != 0))
{
if ( (strcmp(val, "hPa") == 0) || (strcmp(val, "mb") == 0))
config->pressure_conv_factor = HECTOPASCAL;
else if (strcmp(val, "INHG") == 0)
config->pressure_conv_factor = INCHES_HG;
continue; //else default remains
}
if ((strcmp(token,"MYSQL_HOST") == 0) && (strlen(val) != 0))
{
strcpy(config->mysql_host, val);
continue;
}
if ( (strcmp(token,"MYSQL_USERNAME") == 0) && (strlen(val) != 0) )
{
strcpy(config->mysql_user, val);
continue;
}
if ( (strcmp(token,"MYSQL_PASSWORD") == 0) && (strlen(val) != 0) )
{
strcpy(config->mysql_passwd, val);
continue;
}
if ( (strcmp(token,"MYSQL_DATABASE") == 0) && (strlen(val) != 0) )
{
strcpy(config->mysql_database, val);
continue;
}
if ( (strcmp(token,"MYSQL_PORT") == 0) && (strlen(val) != 0) )
{
config->mysql_port = atoi(val);
continue;
}
if ( (strcmp(token,"PGSQL_CONNECT") == 0) && (strlen(val) != 0) )
{
strcpy(config->pgsql_connect, val);
continue;
}
if ( (strcmp(token,"PGSQL_TABLE") == 0) && (strlen(val) != 0) )
{
strcpy(config->pgsql_table, val);
continue;
}
if ( (strcmp(token,"PGSQL_STATION") == 0) && (strlen(val) != 0) )
{
strcpy(config->pgsql_station, val);
continue;
}