Hi,
i have a solarmax 13 mt 3 solar power inverter, which is connected to my network.
I have found some C code which can read out the solar inverter and write the data to a file.
Maybe someone can look at this code and tell me, how i can use this inside openhab? Best thing would be, if i could use this with http-binding or something like this, without the need of this c programm.
Or second best way would be, if this c programm could send the data to openhab (rest api - curl ?) instead of writing it only into a text-file.
Or send the data with MQTT would also be an option.
Is anybody here who can take a short look at this? Here is the code:
I can start the logging with this command:
sudo ./logger 192.168.1.10 12345 test.txt 10
/*
Simple solarmax logger c program written by zagibu@gmx.ch in August 2010
This program is licensed under WTFPL 2 http://sam.zoy.org/wtfpl/
# ./logger hostname port logfile loginterval
Sources:
- http://www.linuxhowtos.org/C_C++/socket.htm
- http://wwwuser.gwdg.de/~kboehm/ebook/21_kap15_w6.html#49329
- http://man.cx/setbuf%283%29
- http://www.hinz.fdns.net/timestamp-in-c-and-python.html
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <time.h>
void error(char *msg)
{
perror(msg);
exit(0);
}
int main(int argc, char *argv[])
{
int sockfd, portno, n, log_interval;
struct sockaddr_in serv_addr;
struct hostent* server;
char* message = "{FB;01;46|64:KDY;KMT;KYR;KT0;TNF;TKK;PAC;PRL;IL1;IDC;UL1;UDC;SYS|1199}";
char buffer[256];
FILE* file;
char* file_name;
char* mode = "a";
time_t* timestamp;
// Check commandline arguments
if (argc < 5)
error("ERROR program needs hostname, port, logfile and loginterval (in seconds) as parameters");
// Get log file path from command line argument
file_name = argv[3];
// Get log interval from command line argument
log_interval = atoi(argv[4]);
// Try to open log file
if ((file = fopen(file_name, mode)) == NULL)
error("ERROR opening log file");
// Make file unbuffered
setbuf(file, NULL);
while (1) {
// Try to open socket
portno = atoi(argv[2]);
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
sleep(60);
continue;
}
// Try to resolve host
server = gethostbyname(argv[1]);
if (server == NULL) {
sleep(60);
continue;
}
// Try to establish a connection
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr,
(char *)&serv_addr.sin_addr.s_addr,
server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,&serv_addr,sizeof(serv_addr)) < 0) {
sleep(60);
continue;
}
// Start sending the data requests and logging the answers
while (1) {
printf("sending message: %s\n", message);
// Send message 1
n = write(sockfd,message,strlen(message));
if (n < 0)
break;
// Read answer
bzero(buffer, 256);
n = read(sockfd, buffer, 255);
if (n < 0)
break;
printf("received answer: %s\n", buffer);
// Write the current timestamp to file
timestamp = time(NULL);
fprintf(file, "NOW=%d;", (int) timestamp);
// Write the answer data to file
fprintf(file, "%s;", buffer + 13);
// Wait for the specified number of seconds
sleep(log_interval);
}
}
return 0;
}
This c code sends the data with “fprintf” to the file. So how do i have to change this, to send the data with maybe curl to openhab?
With this code i can send data to openhab with the rest api:
curl http://192.168.1.10:8080/classicui/CMD?Dummy_switch=ON
