From: Martin Mares <mj@ucw.cz>
Date: Sat, 7 Jan 2012 23:21:35 +0000 (+0100)
Subject: Corrections for my sensors
X-Git-Tag: v1.2~16
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=7279af655a27d680b867c41ca647a7ab9789e67e;p=arexx.git

Corrections for my sensors
---

diff --git a/arexxd.c b/arexxd.c
index c93ec57..554d45a 100644
--- a/arexxd.c
+++ b/arexxd.c
@@ -1,7 +1,7 @@
 /*
  *	Linux Interfece for Arexx Data Loggers
  *
- *	(c) 2011 Martin Mares <mj@ucw.cz>
+ *	(c) 2011-2012 Martin Mares <mj@ucw.cz>
  */
 
 #include <stdio.h>
@@ -158,18 +158,38 @@ static void rrd_point(time_t t, int id, double val, char *unit)
 
 static int data_point_counter;
 
+static double correct_point(int id, double val)
+{
+	/*
+	 *  Manually calculated corrections for my sensors.
+	 *  Replace with your formulae.
+	 */
+	switch (id) {
+		case 10415:
+			return val - 0.93;
+		case 19246:
+			return val + 0.49;
+		case 12133:
+			return val + 0.44;
+		default:
+			return val;
+	}
+}
+
 static void cooked_point(time_t t, int id, double val, char *unit, int q)
 {
+	double val2 = correct_point(id, val);
+
 	if (debug_raw_data) {
 		struct tm tm;
 		localtime_r(&t, &tm);
 		char tbuf[64];
 		strftime(tbuf, sizeof(tbuf), "%Y-%m-%d %H:%M:%S", &tm);
-		printf("== %s id=%d val=%.3f unit=%s q=%d\n", tbuf, id, val, unit, q);
+		printf("== %s id=%d val=%.3f val2=%.3f unit=%s q=%d\n", tbuf, id, val, val2, unit, q);
 	}
 
 	data_point_counter++;
-	rrd_point(t, id, val, unit);
+	rrd_point(t, id, val2, unit);
 }
 
 static void raw_point(int t, int id, int raw, int q)