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#include <arpa/inet.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#define PORT 2319
static int ifd;
static void log_data(char *name, char *value) {
char buf[512];
struct sockaddr_in addr;
struct timeval tv;
addr.sin_family = AF_INET;
addr.sin_port = htons(8089);
inet_aton("10.51.0.15", &addr.sin_addr);
gettimeofday(&tv, NULL);
snprintf(buf, sizeof(buf), "%s %s %ld\n", name, value, (tv.tv_sec * 1000000000) + (tv.tv_usec * 1000));
printf(buf);
sendto(ifd, buf, strlen(buf), 0, (struct sockaddr*) &addr, sizeof(addr));
}
int main(int argc, char **argv) {
int ret;
char c = 'L', last = 'L';
ssize_t in;
int fd;
int sfd;
int be = 1;
char buf[256];
struct sockaddr_in addr;
if(argc < 2) {
printf("Usage: %s <serial port>\n", argv[0]);
exit(EXIT_FAILURE);
}
fd = open(argv[1], O_RDONLY);
if(fd < 0) {
perror("Failed to open serial port");
exit(EXIT_FAILURE);
}
sfd = socket(AF_INET, SOCK_DGRAM, 0);
if(sfd < 0) {
perror("Failed to open socket");
exit(EXIT_FAILURE);
}
setsockopt(sfd, SOL_SOCKET, SO_BROADCAST, &be, sizeof(be));
if(ret < 0) {
perror("Failed to enable broadcasts on socket");
exit(EXIT_FAILURE);
}
ifd = socket(AF_INET, SOCK_DGRAM, 0);
if(sfd < 0) {
perror("Failed to open InfluxDB socket");
exit(EXIT_FAILURE);
}
addr.sin_family = AF_INET;
addr.sin_port = htons(PORT);
addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
for(;;) {
in = read(fd, &c, 1);
if(in < 0) {
perror("Failed to read from serial port");
exit(EXIT_FAILURE);
}
if(c != 'H' && c != 'L')
continue;
snprintf(buf, sizeof(buf), "%c->%c", last, c);
puts(buf);
sendto(sfd, buf, strlen(buf), 0, (struct sockaddr*) &addr, sizeof(addr));
if(c != last) {
if(last == 'L' && c == 'H')
log_data("bedroom_door", "open=true");
if(last == 'H' && c == 'L')
log_data("bedroom_door", "open=false");
}
last = c;
}
return 0;
}
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