add influx driver

src/Makefile

@@ -1,9 +1,9 @@
 CC=gcc
 
 CFLAGS=-Wall
-LDFLAGS=-lwiringPi
+LDFLAGS=-lwiringPi -lcurl
 
-counter:	counter.o LS7366R.o
+counter:	counter.o LS7366R.o influx.o
 	$(CC) -o $@ $(LDFLAGS) $^
 
 .c.o:

src/influx.c

@@ -0,0 +1,25 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <curl/curl.h>
+
+const char INFLUXURL[] = "http://172.16.3.15:8086/write?db=smarthome2&precision=ms";
+
+
+void influxSendFrequency(double f) {
+    char buffer[256];
+
+    sprintf(buffer, "mainsfrequency freq=%f", f);
+
+    CURL *curl = curl_easy_init();
+    if(curl) {
+        curl_easy_setopt(curl, CURLOPT_URL, INFLUXURL);
+        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, buffer);
+        CURLcode res = curl_easy_perform(curl);
+        if(res != CURLE_OK) {
+            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
+        } else {
+            printf("inserted into database\n");
+        }
+        curl_easy_cleanup(curl);
+    }
+}

src/influx.h

@@ -0,0 +1,7 @@
+#ifndef _INFLUX_H_
+#define _INFLUX_H_
+
+void influxSendFrequency(double f);
+
+
+#endif // _INFLUX_H_