diff -r 5e0695f6add5 -r 9322c619c525 coolers/sensors.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/coolers/sensors.c	Mon May 05 23:33:31 2014 +0200
@@ -0,0 +1,122 @@
+/*****************************************************************************
+ * Copyright (C) 2014
+ *   
+ * Michiel Broek <mbroek at mbse dot eu>
+ *
+ * This file is part of the mbsePi-apps
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * mbsePi-apps is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with EC-65K; see the file COPYING.  If not, write to the Free
+ * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *****************************************************************************/
+
+#include "../lib/mbselib.h"
+#include "sensors.h"
+
+#ifdef HAVE_WIRINGPI_H
+
+
+extern char		*myhostname;
+extern bool		debug;
+extern sys_config	Config;
+extern int		lcdHandle;
+extern int		lcdupdate;
+
+
+
+void my_sensors_loop(void)
+{
+    w1_therm		*tmp1, *old1;
+    char		*device, line[60], *p = NULL;
+    FILE		*fp;
+    int			temp, rc, deviation;
+
+    /*
+     * Here send our 1-wire sensors values
+     */
+    for (tmp1 = Config.w1therms; tmp1; tmp1 = old1) {
+	old1 = tmp1->next;
+
+	/*
+	 * Build path and alias topic
+	 */
+	device = xstrcpy((char *)"/sys/bus/w1/devices/");
+	device = xstrcat(device, tmp1->master);
+	device = xstrcat(device, (char *)"/");
+	device = xstrcat(device, tmp1->name);
+	device = xstrcat(device, (char *)"/w1_slave");
+
+	/*
+	 * Read sensor data
+	 */
+	if ((fp = fopen(device, "r"))) {
+		    /*
+		     * The output looks like:
+		     * 72 01 4b 46 7f ff 0e 10 57 : crc=57 YES
+		     * 72 01 4b 46 7f ff 0e 10 57 t=23125
+		     */
+		    fgets(line, 50, fp);
+		    line[strlen(line)-1] = '\0';
+		    if ((line[36] == 'Y') && (line[37] == 'E')) {
+			/*
+			 * CRC is Ok, continue
+			 */
+		    	fgets(line, 50, fp);
+			line[strlen(line)-1] = '\0';
+			strtok(line, (char *)"=");
+			p = strtok(NULL, (char *)"=");
+			rc = sscanf(p, "%d", &temp);
+			if ((rc == 1) && (tmp1->lastval != temp)) {
+			    /*
+			     * It is possible to have read errors or extreme values.
+			     * This can happen with bad connections so we compare the
+			     * value with the previous one. If the difference is too
+			     * much, we don't send that value. That also means that if
+			     * the next value is ok again, it will be marked invalid too.
+			     * Maximum error is 20 degrees for now.
+			     */
+			    deviation = 20000;
+			    if ((tmp1->lastval == 0) ||
+				(tmp1->lastval && (temp > (tmp1->lastval - deviation)) && (temp < (tmp1->lastval + deviation)))) {
+			    	/*
+			    	 * Temperature is changed and valid, update and publish this.
+			    	 */
+				tmp1->update = TRUE;
+			    } else {
+				syslog(LOG_NOTICE, "deviation error deviation=%d, old=%d new=%d", deviation, tmp1->lastval, temp);
+				if (debug) {
+				    fprintf(stdout, "deviation error deviation=%d, old=%d new=%d\n", deviation, tmp1->lastval, temp);
+				}
+			    }
+			    tmp1->lastval = temp;
+			    lcdupdate = TRUE;
+			}
+		    } else {
+			syslog(LOG_NOTICE, "sensor %s/%s CRC error", tmp1->master, tmp1->name);
+		    }
+		    fclose(fp);
+		    tmp1->present = 1;
+	} else {
+		    tmp1->present = 0;
+		    if (debug)
+		    	printf("sensor %s is missing\n", tmp1->name);
+	}
+
+	free(device);
+	device = NULL;
+    }
+}
+
+
+
+#endif