diff -r 79001a992f4f -r e4a9172437bf thermferm/server.c
--- a/thermferm/server.c	Sun Mar 08 16:51:19 2015 +0100
+++ b/thermferm/server.c	Sun Mar 08 17:26:54 2015 +0100
@@ -263,6 +263,7 @@
 /*
  * ARCHIVE DIR
  * ARCHIVE GET filename
+ * ARCHIVE LOG filename
  * ARCHIVE HELP
  */
 int cmd_archive(char *buf)
@@ -290,6 +291,7 @@
 	srv_send((char *)"Recognized commands:");
 	srv_send((char *)"ARCHIVE DIR                   Archived logfiles directory");
 	srv_send((char *)"ARCHIVE GET filename          Archived logfile download");
+	srv_send((char *)"ARCHIVE LOG filename          Archived logfile data in graphsteps");
 	srv_send((char *)".");
 	return 0;
     }
@@ -395,7 +397,102 @@
 	    fclose(fp);
 	} else {
 	    srv_send((char *)"440 No such file");
-	    return 1;
+	}
+
+	free(name);
+	name = NULL;
+	return 1;
+    }
+
+    if (strcmp(opt, (char *)"LOG") == 0) {
+	if (getenv((char *)"USER") == NULL) {
+	    name = xstrcpy((char *)"/root");
+	} else {
+	    name = xstrcpy(getenv((char *)"HOME"));
+	}
+	name = xstrcat(name, (char *)"/.thermferm/log/");
+	name = xstrcat(name, param);
+
+	if ((fp = fopen(name, "r"))) {
+	    char        buffer[256], outbuf[256], q[5];
+	    char	*date_n, *mode_n, *air_n, *beer_n, *target_n, *heater_n, *cooler_n;
+	    char	*heater_u, *cooler_u;
+	    int		lines = 0, heater_l = 0, cooler_l = 0, h = 0, c = 0, heat_used = 0, cool_used = 0, graphstep = 0;
+
+	    srv_send((char *)"212 Logfile list follows:");
+	    while (fgets(buffer, sizeof(buffer)-1, fp) != NULL) {
+		lines++;
+	    }
+	    fseek(fp, 0L, SEEK_SET);
+	    /*
+	     * We have counted the lines in the logfile including the header lines.
+	     * The header lines should be ignored but there are so few of them, we
+	     * just include them in the total.
+	     * Now find a reasonable interval of lines to sent to the client.
+	     */
+	    for (graphstep = 1; graphstep <= MAX_INTERVALS; graphstep++) {
+		if (lines < GRAPH_DATALINES[graphstep]) {
+		    break;
+		}
+	    }
+	    syslog(LOG_NOTICE, "ARCHIVE LOG %s: lines=%d, interval=%d, graphstep=%d", param, lines, GRAPH_INTERVAL[graphstep], graphstep);
+
+	    while (fgets(buffer, sizeof(buffer)-1, fp) != NULL) {
+		/*
+		 * 2014-11-15 18:39,BEER,20.312,19.750,20.0,0,NA,NA,NA,78105,NA,NA
+		 */
+		q[0] = buffer[11];
+		q[1] = buffer[12];
+		q[2] = buffer[14];
+		q[3] = buffer[15];
+		buffer[strlen(buffer) -1] = '\0';
+		date_n = strtok(buffer, ",\0"); /* timestamp            */
+		mode_n = strtok(NULL, ",\0");   /* unit mode            */
+		air_n = strtok(NULL, ",\0");    /* air temp             */
+		beer_n = strtok(NULL, ",\0");   /* beer temp            */
+		target_n = strtok(NULL, ",\0"); /* target temp          */
+		heater_n = strtok(NULL, ",\0"); /* current heater state */
+		cooler_n = strtok(NULL, ",\0"); /* current cooler state */
+		heater_u = strtok(NULL, ",\0"); /* current fan state    */
+		heater_u = strtok(NULL, ",\0"); /* current door state   */
+		heater_u = strtok(NULL, ",\0"); /* heater use counter   */
+		cooler_u = strtok(NULL, ",\0"); /* cooler use counter   */
+
+		if (strncmp(mode_n, (char *)"Mode", 4)) {
+		    /*
+		     * Output a line at the right intervals
+		     */
+		    if (((graphstep == 1)) ||
+			((graphstep == 2) && (q[3] == '0' || q[3] == '5')) ||
+			((graphstep == 3) && ((q[2] == '0' && q[3] == '0') || (q[2] == '1' && q[3] == '5') || (q[2] == '3' && q[3] == '0') || (q[2] == '4' && q[3] == '5'))) ||
+			((graphstep == 4) && ((q[2] == '0' && q[3] == '0') || (q[2] == '3' && q[3] == '0'))) ||
+			((graphstep == 5) && (q[2] == '0' && q[3] == '0')) ) {
+			heat_used = cool_used = 0;
+			if (strcmp(heater_u, "NA") && (sscanf(heater_u, "%d", &h) == 1)) {
+			    if (h && heater_l) {
+				heat_used = ((h - heater_l) * 100) / (GRAPH_INTERVAL[graphstep] * 60);
+			    }
+			}
+			if (strcmp(cooler_u, "NA") && (sscanf(cooler_u, "%d", &c) == 1)) {
+			    if (c && cooler_l) {
+				cool_used = ((c - cooler_l) * 100) / (GRAPH_INTERVAL[graphstep] * 60);
+			    }
+			}
+			snprintf(outbuf, 255, "%s,%s,%s,%s,%s,%s,%s,%d,%d", 
+				date_n, mode_n, air_n, beer_n, target_n, heater_n, cooler_n, heat_used, cool_used);
+			srv_send(outbuf);
+			if (h && strcmp(heater_u, "NA"))
+			    heater_l = h;
+			if (c & strcmp(cooler_u, "NA"))
+			    cooler_l = c;
+		    }
+		}
+	    }
+
+	    srv_send((char *)".");
+	    fclose(fp);
+	} else {
+	    srv_send((char *)"440 No such file");
 	}
 
 	free(name);
@@ -2363,8 +2460,8 @@
 		srv_send((char *)"Recognized commands:");
 		srv_send((char *)"");
 //                                12345678901234567890123456789012345678901234567890123456789012345678901234567890
-		srv_send((char *)"ARCHIVE DIR                   Archived logfiles directory");
-		srv_send((char *)"ARCHIVE GET filename          Archived logfile download");
+		srv_send((char *)"ARCHIVE <CMD> [parameters]    Archive commands");
+		srv_send((char *)"ARCHIVE HELP                  Archive help screen");
 		srv_send((char *)"DEVICE ADD type               Add new Device type");
 		srv_send((char *)"DEVICE DEL uuid               Delete Device by uuid");
 		srv_send((char *)"DEVICE LIST                   List Devices");
@@ -2373,7 +2470,7 @@
 		srv_send((char *)"GLOBAL GET                    Get global settings");
 		srv_send((char *)"GLOBAL PUT                    Put global settings");
 		srv_send((char *)"LIST                          List all fermenter units");
-		srv_send((char *)"LIST LOG uuid                 List logfile data in 1 hour lines");
+		srv_send((char *)"LIST LOG uuid                 List logfile data graphsteps");
 		srv_send((char *)"PING                          Check if server is alive");
 		srv_send((char *)"PROFILE uuid,name             Profile rename");
 		srv_send((char *)"PROFILE ADD name              Add new Profile with name");