diff --git a/Makefile b/Makefile
index 1999ee1..65668bc 100644
--- a/Makefile
+++ b/Makefile
@@ -2,16 +2,18 @@
 LDFLAGS := -fdata-sections -ffunction-sections -Wl,--gc-sections -Wl,--discard-all
 LDFLAGS += -lm -pthread
 SRCS := $(wildcard *.c)
-DEFINES := $(DEF) -D_XOPEN_SOURCE=1111
-DEFINES += -DEBUG
-#OBJDIR := mk
-CFLAGS += -O2 -Wall -Werror -Wextra -Wno-trampolines -std=gnu99
-#OBJS := $(addprefix $(OBJDIR)/, $(SRCS:%.c=%.o))
-#DEPS := $(OBJS:.o=.d)
+#GCC_GE_4_9_3 := $(shell g++ -dumpversion | gawk '{print $$1>=4.9.3?"1":"0"}')
+DEFINES := $(DEF)   -D_XOPEN_SOURCE=1111
+#ifeq ($(GCC_GE_4_9_3),1)
+    DEFINES += -D_DEFAULT_SOURCE
+#else
+#	DEFINES += -D_BSD_SOURCE
+#endif
+#DEFINES += -DEBUG
+CFLAGS += -Wall -Wextra -O2 -std=gnu99
 CC = gcc
 
 all : sbig340 daemon client
-# $(OBJDIR)
 
 sbig340 : $(SRCS)
 	@echo -e "\t\tLD sbig340"
@@ -25,27 +27,11 @@ client : $(SRCS)
 	@echo -e "\t\tLD client"
 	$(CC) -DCLIENT $(CFLAGS) $(DEFINES) $(LDFLAGS) $(shell pkg-config --libs cfitsio) -ltiff  $(SRCS) -o client
 
-#$(OBJDIR):
-#	mkdir $(OBJDIR)
-
-#ifneq ($(MAKECMDGOALS),clean)
-#-include $(DEPS)
-#endif
-
-#$(OBJDIR)/%.o: %.c
-#	@echo -e "\t\tCC $<"
-#	$(CC) -MD -c $(LDFLAGS) $(CFLAGS) $(DEFINES) -o $@ $<
-
-#clean:
-#	@echo -e "\t\tCLEAN"
-#	@rm -f $(OBJS) $(DEPS)
-#	@rmdir $(OBJDIR) 2>/dev/null || true
-
-#xclean: clean
-#	@rm -f $(PROGRAM)
+clean:
+	@echo -e "\t\tCLEAN"
+	@rm -f sbig340 daemon client
 
 gentags:
 	CFLAGS="$(CFLAGS) $(DEFINES)" geany -g $(PROGRAM).c.tags *[hc] 2>/dev/null
 
-.PHONY: gentags
-#clean xclean
+.PHONY: gentags clean
diff --git a/Readme.md b/README.md
similarity index 100%
rename from Readme.md
rename to README.md
diff --git a/cmdlnopts.c b/cmdlnopts.c
index a18dc99..9e0a365 100644
--- a/cmdlnopts.c
+++ b/cmdlnopts.c
@@ -53,8 +53,10 @@ glob_pars const Gdefault = {
     .imformat = NULL,
     .imstoretype = NULL,
     .outpfname = "output.tiff",
-    .hostname = "localhost",
-    .port = "4444"
+    .hostname = NULL,
+    .port = "4444",
+    .once = 0,
+    .timestamp = 0,
 };
 
 /*
@@ -93,6 +95,8 @@ myoption cmdlnopts[] = {
 #if defined DAEMON || defined CLIENT
 #ifndef DAEMON
     {"hostname",NEED_ARG,   NULL,   'H',    arg_string, APTR(&G.hostname),  _("hostname to connect (default: localhost)")},
+    {"once",    NO_ARGS,    NULL,   '1',    arg_int,    APTR(&G.once),      _("run client just once")},
+    {"timestamp",NO_ARGS,   NULL,   't',    arg_int,    APTR(&G.timestamp), _("add timestamp to filename")},
 #endif
     {"port",    NEED_ARG,   NULL,   'p',    arg_string, APTR(&G.port),      _("port to connect (default: 4444)")},
 #endif
diff --git a/cmdlnopts.h b/cmdlnopts.h
index b4d0224..6b3543a 100644
--- a/cmdlnopts.h
+++ b/cmdlnopts.h
@@ -35,6 +35,8 @@ typedef struct{
     int rest_pars_num;      // number of rest parameters
     heater_cmd heater;      // turn heater on/off/leave unchanged
     int splist;             // list speeds available
+    int once;               // run once (client)
+    int timestamp;          // add timestamp
     int newspeed;           // change speed
     int speed;              // connect @ this speed
     char *shutter_cmd;      // shutter command: 'o' for open, 'c' for close, 'k' for de-energize
diff --git a/imfunctions.c b/imfunctions.c
index cdafbc9..b6eac90 100644
--- a/imfunctions.c
+++ b/imfunctions.c
@@ -25,10 +25,12 @@
 #include "imfunctions.h"
 #include "term.h"
 #include <strings.h> // strncasecmp
-#include <tiffio.h>  // save tiff
 #include <math.h>    // sqrt
 #include <time.h>    // time, gmtime etc
+#ifndef DAEMON
 #include <fitsio.h>  // save fits
+#include <tiffio.h>  // save tiff
+#endif
 #include <libgen.h>  // basename
 #include <sys/stat.h> // utimensat
 #include <fcntl.h>   // AT_...
@@ -38,7 +40,8 @@ double exp_calculated = -1.; // optimal exposition, calculated in histogram save
  * All image-storing functions modify ctime of saved files to be the time of
  * exposition start!
  */
-
+#ifndef DAEMON
+#include <time.h>
 void modifytimestamp(char *filename, imstorage *img){
     if(!filename) return;
     struct timespec times[2];
@@ -58,9 +61,19 @@ void modifytimestamp(char *filename, imstorage *img){
  * make filename for given name, suffix and storage type
  * @return filename or NULL if can't create it
  */
-static char *make_filename(const char *outfile, const char *suff, store_type st){
+static char *make_filename(imstorage *img, const char *suff){
     struct stat filestat;
     static char buff[FILENAME_MAX];
+    store_type st = img->st;
+    char fnbuf[FILENAME_MAX], *outfile = img->imname;
+    if(img->timestamp){
+        struct tm *stm = localtime(&img->exposetime);
+        // add timestamp as YYYY-MM-DD_hh:mm:ss
+        snprintf(fnbuf, FILENAME_MAX, "%s_%04d-%02d-%02d_%02d:%02d:%02d", outfile,
+            1900+stm->tm_year, 1+stm->tm_mon, stm->tm_mday,
+            stm->tm_hour, stm->tm_min, stm->tm_sec);
+        outfile = fnbuf;
+    }
     if(st == STORE_NORMAL || st == STORE_REWRITE){
         snprintf(buff, FILENAME_MAX, "%s.%s", outfile, suff);
         if(stat(buff, &filestat)){
@@ -143,18 +156,20 @@ imstorage *chk_storeimg(char *filename, char* store, char *format){
     #define FMTSZ (3)
     image_format formats[FMTSZ] = {FORMAT_FITS, FORMAT_TIFF, FORMAT_RAW};
     const char *suffixes[FMTSZ] = {SUFFIX_FITS, SUFFIX_TIFF, SUFFIX_RAW};
-    for(size_t i = 0; i < FMTSZ; ++i){
-        if(!(formats[i] & fmt)) continue;
-        if(!make_filename(nm, suffixes[i], st)){
-            WARNX(_("Can't create output file (is it exists?)"));
-            free(nm);
-            return NULL;
-        }
-    }
     imstorage *ist = MALLOC(imstorage, 1);
     ist->st = st;
     ist->imformat = fmt;
     ist->imname = strdup(nm);
+    for(size_t i = 0; i < FMTSZ; ++i){
+        if(!(formats[i] & fmt)) continue;
+        if(!make_filename(ist, suffixes[i])){
+            WARNX(_("Can't create output file (is it exists?)"));
+            free(nm);
+            free(ist->imname);
+            free(ist);
+            return NULL;
+        }
+    }
     return ist;
 }
 
@@ -165,7 +180,7 @@ imstorage *chk_storeimg(char *filename, char* store, char *format){
 int writetiff(imstorage *img){
     int H = img->H, W = img->W, y;
     uint16_t *data = img->imdata;
-    char *name = make_filename(img->imname, SUFFIX_TIFF, img->st);
+    char *name = make_filename(img, SUFFIX_TIFF);
     TIFF *image = NULL;
     if(!name || !(image = TIFFOpen(name, "w"))){
         WARN("Can't save tiff file");
@@ -195,6 +210,7 @@ int writetiff(imstorage *img){
     modifytimestamp(name, img);
     return 0;
 }
+#endif
 
 /**
  * Calculate image statistics: print it on screen and save for `writefits`
@@ -243,6 +259,7 @@ void print_stat(imstorage *img){
     printf("At 3sigma: Noverload = %ld, avr = %.3f, std = %.3f\n", Noverld, avr, std);
 }
 
+#ifndef DAEMON
 #define TRYFITS(f, ...)                     \
 do{ int status = 0;                         \
     f(__VA_ARGS__, &status);                \
@@ -260,7 +277,7 @@ int writefits(imstorage *img){
     long naxes[2] = {img->W, img->H};
     char buf[80];
     fitsfile *fp;
-    char *filename = make_filename(img->imname, SUFFIX_FITS, img->st);
+    char *filename = make_filename(img, SUFFIX_FITS);
     TRYFITS(fits_create_file, &fp, filename);
     TRYFITS(fits_create_img, fp, USHORT_IMG, 2, naxes);
     // FILE / Input file original name
@@ -293,9 +310,9 @@ int writefits(imstorage *img){
     WRITEKEY(TSTRING, "IMAGETYP", buf, "Image type");
     // DATAMAX, DATAMIN / Max,min pixel value
     uint16_t val = UINT16_MAX;
-    WRITEKEY(TUSHORT, "DATAMAX", &val, "Max pixel value");
+    WRITEKEY(TUSHORT, "DATAMAX", &val, "Max possible pixel value");
     val = 0;
-    WRITEKEY(TUSHORT, "DATAMIN", &val, "Min pixel value");
+    WRITEKEY(TUSHORT, "DATAMIN", &val, "Min possible pixel value");
     // statistical values
     WRITEKEY(TUSHORT, "STATMAX", &glob_max, "Max pixel value");
     WRITEKEY(TUSHORT, "STATMIN", &glob_min, "Min pixel value");
@@ -335,6 +352,7 @@ int writefits(imstorage *img){
     green(_("Image %s saved\n"), filename);
     return 0;
 }
+#endif
 
 #ifndef CLIENT
 /**
@@ -406,8 +424,9 @@ int save_histo(FILE *f, imstorage *img){
     return 0;
 }
 
+#ifndef DAEMON
 int writedump(imstorage *img){
-    char *name = make_filename(img->imname, SUFFIX_RAW, img->st);
+    char *name = make_filename(img, SUFFIX_RAW);
     if(!name) return 1;
     int f = open(name, O_WRONLY|O_CREAT|O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
     if(f){
@@ -423,7 +442,7 @@ int writedump(imstorage *img){
         return 3;
     }
     modifytimestamp(name, img);
-    name = make_filename(img->imname, "histogram.txt", img->st);
+    name = make_filename(img, "histogram.txt");
     if(!name) return 4;
     FILE *h = fopen(name, "w");
     if(!h) return 5;
@@ -466,3 +485,4 @@ int store_image(imstorage *img){
     }
     return status;
 }
+#endif
diff --git a/imfunctions.h b/imfunctions.h
index dc9af0d..fd122d1 100644
--- a/imfunctions.h
+++ b/imfunctions.h
@@ -66,6 +66,8 @@ typedef struct{
     size_t W, H;       // image size
     uint16_t *imdata;  // image data itself
     time_t exposetime; // time of exposition start
+    int timestamp; // add timestamp to filename
+    int once; // get only one image
 } imstorage;
 
 extern double exp_calculated;
diff --git a/main.c b/main.c
index a59b2ef..72decc4 100644
--- a/main.c
+++ b/main.c
@@ -111,6 +111,10 @@ int main(int argc, char **argv){
         run_terminal(); // non-echo terminal mode
     }
 #endif // !defined DAEMON && !defined CLIENT
+#ifdef CLIENT
+    img->once = G->once;
+    img->timestamp = G->timestamp;
+#endif
 #if defined CLIENT || defined DAEMON
     daemonize(img, G->hostname, G->port);
 #endif
diff --git a/socket.c b/socket.c
index 0aaad61..947a8a1 100644
--- a/socket.c
+++ b/socket.c
@@ -31,6 +31,9 @@
 #include <pthread.h>
 #include <limits.h>     // INT_xxx
 #include <signal.h> // pthread_kill
+#include <unistd.h> // daemon
+#include <sys/wait.h> // wait
+#include <sys/prctl.h> //prctl
 
 #define BUFLEN    (10240)
 #define BUFLEN10  (1048576)
@@ -396,6 +399,7 @@ static void client_(imstorage *img, int sock){
             if(store_image(img))
                 WARNX(_("Error storing image"));
         }
+        if(img->once) break;
     }
 }
 #endif
@@ -405,8 +409,9 @@ static void client_(imstorage *img, int sock){
  */
 void daemonize(imstorage *img, char *hostname, char *port){
     FNAME();
-    green("Daemonize\n");
 #ifndef EBUG
+    if(!img->once){
+    green("Daemonize\n");
     if(daemon(1, 0)){
         ERR("daemon()");
     }
@@ -421,7 +426,7 @@ void daemonize(imstorage *img, char *hostname, char *port){
             prctl(PR_SET_PDEATHSIG, SIGTERM); // send SIGTERM to child when parent dies
             break; // go out to normal functional
         }
-    }
+    }}
 #endif
     int sock = -1;
     struct addrinfo hints, *res, *p;
diff --git a/term.h b/term.h
index e15908a..46fe622 100644
--- a/term.h
+++ b/term.h
@@ -41,7 +41,7 @@ typedef enum{
 } heater_cmd;
 
 // terminal timeout (seconds)
-#define     WAIT_TMOUT      (0.1)
+#define     WAIT_TMOUT      (0.2)
 // timeout waitint 'D'
 #define     EXP_DONE_TMOUT  (5.0)
 // dataportion transfer timeout
diff --git a/usefull_macros.c b/usefull_macros.c
index fbac349..4f5ee6b 100644
--- a/usefull_macros.c
+++ b/usefull_macros.c
@@ -333,7 +333,7 @@ size_t read_tty(uint8_t *buff, size_t length){
     int retval;
     FD_ZERO(&rfds);
     FD_SET(comfd, &rfds);
-    tv.tv_sec = 0; tv.tv_usec = 50000; // wait for 50ms
+    tv.tv_sec = 0; tv.tv_usec = 500000; // wait for 500ms max
     retval = select(comfd + 1, &rfds, NULL, NULL, &tv);
     if (!retval) return 0;
     if(FD_ISSET(comfd, &rfds)){