diff --git a/ccdcapture.c b/ccdcapture.c
index da59ea6..8110930 100644
--- a/ccdcapture.c
+++ b/ccdcapture.c
@@ -525,8 +525,11 @@ int cc_read2buf(int fd, cc_strbuff *buf){
     do{
         rd = read(fd, buf->buf + buf->buflen, maxlen);
         if(rd <= 0){
-            if(errno == EAGAIN || errno == EWOULDBLOCK) continue;
-            goto ret;
+            if(errno == EINTR){
+                DBG("errno=%d, '%s'", errno, strerror(errno));
+                continue;
+            }
+            goto ret; // EAGAIN or other error -> client disconnected
         }else break;
     }while(1);
     DBG("got %zd bytes", rd);
@@ -736,6 +739,7 @@ char *cc_nextkw(char *buf, char record[FLEN_CARD], int newlines){
         }
     }else nextline = buf + (FLEN_CARD - 1);
     strncpy(record, buf, l);
+    if(l < FLEN_CARD) record[l] = 0;
     return nextline;
 }
 
diff --git a/ccdcapture.h b/ccdcapture.h
index f4211fd..d5c44ad 100644
--- a/ccdcapture.h
+++ b/ccdcapture.h
@@ -201,9 +201,11 @@ typedef struct{
 // wait for mutex locking
 #define CC_BUSY_TIMEOUT    (1.0)
 // wait for exposition ends (between subsequent check calls)
-#define CC_WAIT_TIMEOUT    (2.0)
+#define CC_WAIT_TIMEOUT    (15.0)
 // client will disconnect after this time from last server message
-#define CC_CLIENT_TIMEOUT  (3.0)
+#define CC_CLIENT_TIMEOUT  (30.0)
+// minimal sleep (us) time when client waits for exp end
+#define CC_IMWAIT_SLEEP     (1000)
 
 // fd - socket fd to send private messages, key, val - key and its value
 typedef cc_hresult (*cc_mesghandler)(int fd, const char *key, const char *val);
@@ -234,6 +236,7 @@ typedef enum{
 #define CC_CMD_SHMEMKEY    "shmemkey"
 
 // CCD/CMOS
+#define CC_CMD_IMNUMBER    "imnumber"
 #define CC_CMD_PLUGINCMD   "plugincmd"
 #define CC_CMD_CAMLIST     "camlist"
 #define CC_CMD_CAMDEVNO    "camdevno"
diff --git a/client.c b/client.c
index 3c6d6e6..aa928fb 100644
--- a/client.c
+++ b/client.c
@@ -39,11 +39,11 @@ extern double answer_timeout;
 static char sendbuf[BUFSIZ];
 static char *lastfilename = NULL;
 // send message and wait any answer
-#define SENDMSG(...) do{DBG("SENDMSG"); snprintf(sendbuf, BUFSIZ-1, __VA_ARGS__); verbose(2, "\t> %s", sendbuf); cc_sendstrmessage(sock, sendbuf); while(getans(sock, NULL));} while(0)
+#define SENDMSG(...) do{DBG("SENDMSG"); snprintf(sendbuf, BUFSIZ-1, __VA_ARGS__); verbose(2, "\t> %s", sendbuf); if(!cc_sendstrmessage(sock, sendbuf)) ERRX("Server disconnected"); while(getans(sock, NULL));} while(0)
 // send message and wait answer starting with 'cmd'
-#define SENDMSGW(cmd, ...) do{DBG("SENDMSGW"); snprintf(sendbuf, BUFSIZ-1, cmd __VA_ARGS__); verbose(2, "\t> %s", sendbuf); cc_sendstrmessage(sock, sendbuf);}while(!getans(sock, cmd))
+#define SENDMSGW(cmd, ...) do{DBG("SENDMSGW"); snprintf(sendbuf, BUFSIZ-1, cmd __VA_ARGS__); verbose(2, "\t> %s", sendbuf); if(!cc_sendstrmessage(sock, sendbuf)) ERRX("Server disconnected");}while(!getans(sock, cmd))
 // send command and wait for answer on it
-#define SENDCMDW(cmd) do{DBG("SENDCMDW"); strncpy(sendbuf, cmd, BUFSIZ-1); verbose(2, "\t> %s", sendbuf); cc_sendstrmessage(sock, sendbuf);}while(!getans(sock, cmd))
+#define SENDCMDW(cmd) do{DBG("SENDCMDW"); strncpy(sendbuf, cmd, BUFSIZ-1); verbose(2, "\t> %s", sendbuf); if(!cc_sendstrmessage(sock, sendbuf)) ERRX("Server disconnected");}while(!getans(sock, cmd))
 static volatile atomic_int expstate = CAMERA_CAPTURE;
 static int xm0,ym0,xm1,ym1; // max format
 static int xc0,yc0,xc1,yc1; // current format
@@ -54,8 +54,9 @@ static int oldgrabno = 0;
 static cc_IMG ima = {0}, *shmima = NULL; // ima - local storage, shmima - shm (if available)
 static size_t imbufsz = 0; // image buffer for allocated `ima`
 static uint8_t *imbuf = NULL; // we can't use shmima->data as it belongs to server, so we use `imbuf` and set ima.data = imbuf
+static int current_image_number = -1; // for net-parser - last number of exposed image
 
-
+#if 0
 // read message from queue or file descriptor
 static char *readmsg(int fd){
     static cc_strbuff *buf = NULL;
@@ -78,6 +79,7 @@ static char *readmsg(int fd){
     }
     return NULL;
 }
+#endif
 
 #define CMP_ANS(cmd, ans)   strncmp(cmd, ans, sizeof(cmd)-1)
 // parser of CCD server messages; return TRUE to exit from polling cycle of `getans` (if receive 'FAIL', 'OK' or 'BUSY')
@@ -89,7 +91,7 @@ static cc_hresult parseans(char *ans){
     for(cc_hresult res = CC_RESULT_BUSY; res < CC_RESULT_NUM; ++res){
         const char *resmsg = cc_hresult2str(res);
         if(0 == strcmp(resmsg, ans)){
-            WARNX("Server answered: %s", resmsg);
+            verbose(1, "Server answered: %s", resmsg);
             return res;
         }
     }
@@ -97,16 +99,18 @@ static cc_hresult parseans(char *ans){
     if(0 == CMP_ANS(CC_CMD_EXPSTATE, ans)){
         int st = atoi(val);
         atomic_store(&expstate, st);
-        DBG("Exposition state: %d", st);
-        return CC_RESULT_OK;
+        DBG("Current state: %d", atomic_load(&expstate));
+        return CC_RESULT_SILENCE;
     }else if(0 == CMP_ANS(CC_CMD_FRAMEMAX, ans)){
         sscanf(val, "%d,%d,%d,%d", &xm0, &ym0, &xm1, &ym1);
         DBG("Got maxformat: %d,%d,%d,%d", xm0, ym0, xm1, ym1);
-        return CC_RESULT_OK;
+        return CC_RESULT_SILENCE;
     }else if(0 == CMP_ANS(CC_CMD_FRAMEFORMAT, ans)){
         sscanf(val, "%d,%d,%d,%d", &xc0, &yc0, &xc1, &yc1);
         DBG("Got current format: %d,%d,%d,%d", xc0, yc0, xc1, yc1);
-        return CC_RESULT_OK;
+        return CC_RESULT_SILENCE;
+    }else if(0 == CMP_ANS(CC_CMD_IMNUMBER, ans)){
+        current_image_number = atoi(val);
     }
     //TIMESTAMP("parseans() end");
     return CC_RESULT_SILENCE; // echo of sent command or something else
@@ -116,13 +120,28 @@ static cc_hresult parseans(char *ans){
 // if msg != NULL - wait for it in answer
 static int getans(int sock, const char *msg){
     double t0 = sl_dtime();
+    char buf[BUFSIZ+1];
+    int idx = 0;
     char *ans = NULL;
-    double tmout = answer_timeout;
+    TIMESTAMP("GetAns(%s)", msg);
+    double tmout = answer_timeout + 5.; // make first timeout larger for slow networks
     // TODO: increase first timeout up to 15-30s (add key?)
-    if(msg) tmout *= 5.; // make first timeout larger for slow networks
     cc_hresult res = CC_RESULT_FAIL;
     while(sl_dtime() - t0 < tmout){
-        ans = readmsg(sock);
+        ans = NULL;
+        if(1 == sl_canread(sock)){
+            ssize_t got = read(sock, buf+idx, BUFSIZ-idx);
+            if(got > 0){
+                idx += got;
+                buf[idx] = 0;
+                char *nl = strchr(buf, '\n');
+                if(nl){
+                    *nl = 0;
+                    ans = buf;
+                    DBG("got '%s'", ans);
+                }
+            }
+        }
         if(!ans) continue;
         // got answer -> make timeout less
         tmout = answer_timeout;
@@ -132,14 +151,15 @@ static int getans(int sock, const char *msg){
         DBG("1 msg-> %s, ans -> %s", msg, ans);
         res = parseans(ans);
         DBG("2 msg-> %s, ans -> %s; result: %d", msg, ans, res);
-        if(res == CC_RESULT_SILENCE && msg){
-            if(strncmp(ans, msg, strlen(msg))) continue;
+        if(msg){
+            if(res != CC_RESULT_SILENCE || strncmp(ans, msg, strlen(msg))) continue;
             else res = CC_RESULT_OK;
         }
         DBG("Got answer -> break");
         break;
     }
-    if(!ans) DBG("Got no answer from server");
+    TIMESTAMP("GetAns(%s), ans: '%s', result: %d", msg, ans, res);
+    if(!ans) DBG("Got no answer from server; result=%d", res);
     if(res == CC_RESULT_OK) return TRUE;
     return FALSE;
 }
@@ -289,8 +309,10 @@ static int getimage(int askheader){
         }
         memcpy(&ima, shmima, sizeof(cc_IMG));
     }else{ // get image by socket
-        DBG("Open socket @ %s", GP->imageport);
-        imsock = cc_open_socket(FALSE, GP->imageport, TRUE);
+        if(imsock < 0){
+            DBG("Open socket @ %s", GP->imageport);
+            imsock = cc_open_socket(FALSE, GP->imageport, TRUE);
+        }
         if(imsock < 0) ERRX("getimage(): can't open image transport socket");
         // get image size
         if(!readNbytes(imsock, sizeof(cc_IMG), (uint8_t*)&ima)){
@@ -298,6 +320,10 @@ static int getimage(int askheader){
             goto eofg;
         }
     }
+    if(ima.MAGICK != CC_SHM_MAGIC){
+        WARNX("Wrong image: bad magick");
+        goto eofg;
+    }
     if(ima.bytelen < 1){
         WARNX("Wrong image size");
         goto eofg;
@@ -358,11 +384,24 @@ static int getimage(int askheader){
         }else ima.headerstrings = 0;
     }else WARNX("Still got old image");
 eofg:
-    if(imsock != -1) close(imsock);
+    if(imsock != -1) close(imsock); // reopen in next time in case of error
     if(shmlocked) cc_unlock_shm();
     return ret;
 }
 
+// get number of current image; return number or -1 if got error/timeout
+static int curImNo(int sock){
+    if(shmima){
+        if(!cc_lock_shm(FALSE)) return -1;
+        int CurNo = shmima->imnumber;
+        cc_unlock_shm();
+        return CurNo;
+    }
+    // no shared memory: try to get number over TCP
+    SENDCMDW(CC_CMD_IMNUMBER);
+    return current_image_number;
+}
+
 void client(int sock){
     if(sock < 0) ERRX("Can't run without command socket");
     if(!GP->forceimsock && !shmima){ // init shm buffer if user don't ask to force workign through image socket
@@ -388,9 +427,11 @@ void client(int sock){
     double timeout = CC_CLIENT_TIMEOUT;
     verbose(1, "Exposing frame 1...");
     atomic_store(&expstate, CAMERA_CAPTURE); // could be changed earlier
+    DBG("Current state: %d", atomic_load(&expstate));
     verbose(2, "Wait for exposition end");
     t0 = sl_dtime();
     tw = tstart = t0;
+    int lastImNo = curImNo(sock);
     while(sl_dtime() - t0 < timeout){
         if(sl_dtime() - tw > CC_WAIT_TIMEOUT){
             SENDCMDW(CC_CMD_TREMAIN); // get remained time
@@ -398,13 +439,12 @@ void client(int sock){
         }
         if(sl_dtime() - tstart < GP->exptime){
             t0 = sl_dtime(); // refresh timeout until exp not ends
+            continue;
         }else{
             SENDCMDW(CC_CMD_EXPSTATE);
-#ifdef EBUG
-            usleep(300000);
-#endif
         }
         int curst = atomic_load(&expstate);
+        DBG("Current state: %d", curst);
         if(curst == CAMERA_ERROR){
             WARNX(_("Can't make exposition"));
             if(Nremain > 1){
@@ -414,25 +454,29 @@ void client(int sock){
             }
             continue;
         }
-        //if(expstate != CAMERA_CAPTURE){
         if(curst == CAMERA_FRAMERDY){
             atomic_store(&expstate, CAMERA_IDLE);
-            if(Nremain > 1){
-                verbose(1, "Exposing frame %d...", nframe+1);
+            int cur = curImNo(sock);
+            DBG("Current state: %d, imno: %d", atomic_load(&expstate), cur);
+            if(Nremain > 1){ // start next capture
+                verbose(1, "Exposing frame %d...", nframe);
                 SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE);
                 tstart = sl_dtime();
             }
-            verbose(2, "Frame ready, try to grab");
             int failed = TRUE;
-            if(!getimage(TRUE)){
-                WARNX("Can't get next image");
-            }else{
-                if(saveFITS(&ima, &lastfilename)){
-                    --Nremain;
-                    ++nframe;
-                    failed = FALSE;
+            if(lastImNo < cur){
+                lastImNo = cur;
+                verbose(2, "Frame ready, try to grab");
+                if(!getimage(TRUE)){
+                    WARNX("Can't get next image");
+                }else{
+                    if(saveFITS(&ima, &lastfilename)){
+                        --Nremain;
+                        ++nframe;
+                        failed = FALSE;
+                    }
                 }
-            }
+            }else verbose(2, "Got already saved image, wait next");
             if(failed && Nremain == 1){ // last image -> should re-expose
                 verbose(1, "Exposing frame %d...", nframe);
                 SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE);
@@ -476,32 +520,40 @@ static void *grabnext(void _U_ *arg){
     FNAME();
     if(controlfd < 0) return NULL;
     int sock = controlfd;
+    int lastImNo = curImNo(sock);
     while(1){
         if(!getWin()) exit(1);
         TIMESTAMP("End of cycle, start new");
         atomic_store(&expstate, CAMERA_CAPTURE);
+        DBG("Current state: %d", atomic_load(&expstate));
         TIMEINIT();
         SENDMSGW(CC_CMD_EXPSTATE, "=%d", CAMERA_CAPTURE); // start capture
         double timeout = GP->exptime + CC_CLIENT_TIMEOUT, t0 = sl_dtime();
         useconds_t sleept = 500000; // 0.5s
         if(GP->exptime < 0.5){
-            sleept = (useconds_t)(GP->exptime * 500000.);
-            if(sleept < 1000) sleept = 1000;
+            sleept = (useconds_t)(GP->exptime * 250000.); // a quater of exposition time
+            if(sleept < CC_IMWAIT_SLEEP) sleept = CC_IMWAIT_SLEEP;
         }
-//        double exptime = GP->exptime;
-        TIMESTAMP("Wait for exposition ends (%g s)", timeout);
+        TIMESTAMP("Wait for exposition ends (%g s), sleep for %dus", timeout, sleept);
+        int curst = CAMERA_CAPTURE;
         while(sl_dtime() - t0 < timeout){
+            DBG("start sleep for %dus", sleept);
             usleep(sleept);
-       //     getans(sock, NULL);
-            //TIMESTAMP("EXPSTATE ===> %d", expstate);
-            if(atomic_load(&expstate) != CAMERA_CAPTURE) break;
-            if(sl_dtime() - t0 < GP->exptime + 0.5) sleept = 1000;
+            SENDCMDW(CC_CMD_EXPSTATE);
+            curst = atomic_load(&expstate);
+            if(curst != CAMERA_CAPTURE) break;
+            if(sl_dtime() - t0 > GP->exptime && sleept != CC_IMWAIT_SLEEP){
+                DBG("Set sleeping time to %dus", sleept);
+                sleept = CC_IMWAIT_SLEEP;
+            }
         }
-        if(sl_dtime() - t0 >= timeout || atomic_load(&expstate) != CAMERA_FRAMERDY){
-            WARNX("Image wasn't received");
+        int cur = curImNo(sock);
+        if(sl_dtime() - t0 >= timeout || curst != CAMERA_FRAMERDY || cur <= lastImNo){
+            WARNX("Image wasn't received, state: %d, waiting: %g, lastNo: %d, curNo: %d (timeout: %g)", curst, sl_dtime() - t0, lastImNo, cur, timeout);
             continue;
         }
-        TIMESTAMP("Frame ready");
+        lastImNo = cur;
+        TIMESTAMP("Frame ready (%d from server's start)", cur);
         getimage(FALSE);
     }
     return NULL;
@@ -512,17 +564,26 @@ static void *waitimage(void _U_ *arg){
     FNAME();
     if(controlfd < 0) return NULL;
     int sock = controlfd;
+    int lastImNo = curImNo(sock);
+    double t0 = sl_dtime();
     while(1){
         if(!getWin()) exit(1);
-        getans(sock, NULL);
-        if(atomic_load(&expstate) != CAMERA_FRAMERDY){
-            usleep(1000);
+        double tcur = sl_dtime();
+        if(tcur - t0 >= CC_WAIT_TIMEOUT){
+            SENDCMDW(CC_CMD_EXPSTATE); // `ping` server to know if it disconnected
+            t0 = tcur;
+        }
+        int cur = curImNo(sock);
+        if(cur <= lastImNo){
+            usleep(CC_IMWAIT_SLEEP);
             continue;
         }
-        TIMESTAMP("End of cycle, start new");
+        lastImNo = cur;
+        TIMESTAMP("End of cycle #%d, start new", cur);
         TIMEINIT();
         getimage(FALSE);
         atomic_store(&expstate, CAMERA_IDLE);
+        DBG("Current state: %d", atomic_load(&expstate));
     }
     return NULL;
 }
diff --git a/locale/ru/messages.po b/locale/ru/messages.po
index e13cfd5..c8da9e7 100644
--- a/locale/ru/messages.po
+++ b/locale/ru/messages.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2026-06-04 18:22+0300\n"
+"POT-Creation-Date: 2026-06-08 17:06+0300\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -494,12 +494,12 @@ msgstr ""
 msgid "Can't set brightness to %g"
 msgstr ""
 
-#: ccdfunc.c:690 server.c:323
+#: ccdfunc.c:690 server.c:330
 #, c-format
 msgid "Can't set binning %dx%d"
 msgstr ""
 
-#: ccdfunc.c:702 server.c:324
+#: ccdfunc.c:702 server.c:331
 msgid "Can't set given geometry"
 msgstr ""
 
@@ -547,11 +547,11 @@ msgstr ""
 msgid "Capture frame %d"
 msgstr ""
 
-#: ccdfunc.c:750 ccdfunc.c:827 server.c:184 server.c:185
+#: ccdfunc.c:750 ccdfunc.c:827 server.c:194 server.c:195
 msgid "Camera plugin have no function `start exposition`"
 msgstr ""
 
-#: ccdfunc.c:752 ccdfunc.c:829 server.c:190 server.c:191
+#: ccdfunc.c:752 ccdfunc.c:829 server.c:200 server.c:201
 msgid "Can't start exposition"
 msgstr ""
 
@@ -563,7 +563,7 @@ msgstr ""
 msgid "Read grabbed image"
 msgstr ""
 
-#: ccdfunc.c:762 ccdfunc.c:842 server.c:208 server.c:209
+#: ccdfunc.c:762 ccdfunc.c:842 server.c:218 server.c:219
 msgid "Camera plugin have no function `capture`"
 msgstr ""
 
@@ -571,7 +571,7 @@ msgstr ""
 msgid "Can't grab image"
 msgstr ""
 
-#: ccdfunc.c:778 client.c:447
+#: ccdfunc.c:778 client.c:491
 #, c-format
 msgid "%d seconds till pause ends\n"
 msgstr ""
@@ -580,15 +580,15 @@ msgstr ""
 msgid "Some error when capture"
 msgstr ""
 
-#: server.c:235
+#: server.c:247
 msgid "No camera device"
 msgstr ""
 
-#: client.c:409
+#: client.c:449
 msgid "Can't make exposition"
 msgstr ""
 
-#: client.c:459
+#: client.c:503
 msgid "Server timeout"
 msgstr ""
 
diff --git a/locale/ru/ru.po b/locale/ru/ru.po
index e20c037..2f47263 100644
--- a/locale/ru/ru.po
+++ b/locale/ru/ru.po
@@ -7,7 +7,7 @@
 msgid   ""
 msgstr  "Project-Id-Version: PACKAGE VERSION\n"
         "Report-Msgid-Bugs-To: \n"
-        "POT-Creation-Date: 2026-06-04 18:16+0300\n"
+        "POT-Creation-Date: 2026-06-08 16:46+0300\n"
         "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
         "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
         "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -21,7 +21,7 @@ msgstr  "Project-Id-Version: PACKAGE VERSION\n"
 msgid   "%.1f seconds till exposition ends"
 msgstr  "%.1f секунд до окончания экспозиции"
 
-#: ccdfunc.c:778 client.c:447
+#: ccdfunc.c:778 client.c:491
 #, c-format
 msgid   "%d seconds till pause ends\n"
 msgstr  "%d секунд до окончания паузы\n"
@@ -66,12 +66,12 @@ msgstr  "
 msgid   "Camera plugin have no fun speed setter"
 msgstr  "У плагина камеры нет особых команд"
 
-#: ccdfunc.c:762 ccdfunc.c:842 server.c:208 server.c:209
+#: ccdfunc.c:762 ccdfunc.c:842 server.c:218 server.c:219
 #, fuzzy
 msgid   "Camera plugin have no function `capture`"
 msgstr  "У плагина камеры нет особых команд"
 
-#: ccdfunc.c:750 ccdfunc.c:827 server.c:184 server.c:185
+#: ccdfunc.c:750 ccdfunc.c:827 server.c:194 server.c:195
 #, fuzzy
 msgid   "Camera plugin have no function `start exposition`"
 msgstr  "У плагина камеры нет особых команд"
@@ -130,7 +130,7 @@ msgstr  "
 msgid   "Can't init mutex!"
 msgstr  "Не могу инициализировать мьютекс!"
 
-#: client.c:409
+#: client.c:449
 msgid   "Can't make exposition"
 msgstr  "Не могу выполнить экспозицию"
 
@@ -174,7 +174,7 @@ msgstr  "
 msgid   "Can't set active wheel number"
 msgstr  "Не могу установить номер активного колеса"
 
-#: ccdfunc.c:690 server.c:323
+#: ccdfunc.c:690 server.c:330
 #, c-format
 msgid   "Can't set binning %dx%d"
 msgstr  "Не могу установить биннинг %dx%d"
@@ -202,7 +202,7 @@ msgstr  "
 msgid   "Can't set gain to %g"
 msgstr  "Не могу установить Gain в %g"
 
-#: ccdfunc.c:702 server.c:324
+#: ccdfunc.c:702 server.c:331
 msgid   "Can't set given geometry"
 msgstr  "Не могу установить геометрию"
 
@@ -225,7 +225,7 @@ msgstr  "
 msgid   "Can't set wheel position %d"
 msgstr  "Не могу установить положение колеса %d"
 
-#: ccdfunc.c:752 ccdfunc.c:829 server.c:190 server.c:191
+#: ccdfunc.c:752 ccdfunc.c:829 server.c:200 server.c:201
 msgid   "Can't start exposition"
 msgstr  "Не могу начать экспозицию"
 
@@ -304,7 +304,7 @@ msgstr  "
 msgid   "N flushes before exposing (default: 1)"
 msgstr  "N засвечиваний перед экспозицией (по умолчанию: 1)"
 
-#: server.c:235
+#: server.c:247
 msgid   "No camera device"
 msgstr  "Не указано устройство камеры"
 
@@ -338,7 +338,7 @@ msgstr  "
 msgid   "Readout mode: %s"
 msgstr  "Режим считывания: %s"
 
-#: client.c:459
+#: client.c:503
 msgid   "Server timeout"
 msgstr  "Таймаут сервера"
 
diff --git a/server.c b/server.c
index 08ca857..c02ec63 100644
--- a/server.c
+++ b/server.c
@@ -82,6 +82,7 @@ strpair allcommands[] = {
     { CC_CMD_HBIN,         "horizontal binning" },
     { CC_CMD_HELP,         "show this help" },
     { CC_CMD_IMHEIGHT,     "last image height" },
+    { CC_CMD_IMNUMBER,     "grabbed image number from server start"},
     { CC_CMD_IMWIDTH,      "last image width" },
     { CC_CMD_INFTY,        "an infinity loop taking images until there's connected clients" },
     { CC_CMD_INSTRUMENT,   "FITS 'INSTRUME' field" },
@@ -116,6 +117,7 @@ static int lock(){
         //DBG("\n\nAlready locked");
         return FALSE;
     }
+    //DBG("LOCK()");
     return TRUE;
 }
 static void unlock(){
@@ -123,6 +125,7 @@ static void unlock(){
         LOGERR("Can't unlock socket mutex");
         ERR("Can't unlock socket mutex");
     }
+    //DBG("UNLOCK()");
 }
 
 static cc_IMG *ima = NULL;
@@ -145,10 +148,15 @@ static void fixima(){
     if(!camera) return;
     double t0 = sl_dtime();
     int locked = FALSE;
+    TIMESTAMP("Lock socket");
     // lock socket operations
-    while(!(locked = lock()) && sl_dtime() - t0 < 0.5);
-    if(!locked) while(!lock()) unlock(); // force unlocking if can't do this gracefully
+    while(!(locked = lock()) && sl_dtime() - t0 < 0.5) usleep(1000);
+    if(!locked){
+        DBG("Still locked from outside -> unlock/lock");
+        while(!lock()) unlock(); // force unlocking if can't do this gracefully
+    }else DBG("LOCK takes %gs", sl_dtime()-t0);
     int raw_width = curformat.w / GP->hbin,  raw_height = curformat.h / GP->vbin;
+    TIMESTAMP("Check SHM image");
     // allocate memory for largest possible image
     if(!ima){
         ima = cc_getshm(GP->shmkey, camera->array.h * camera->array.w * 2);
@@ -156,6 +164,7 @@ static void fixima(){
         // init shared semaphore
         cc_init_sem(TRUE);
     }
+    TIMESTAMP("Lock SHM image");
     cc_lock_shm(TRUE);
     shmkey = GP->shmkey;
     //if(raw_width == ima->w && raw_height == ima->h) return; // all OK
@@ -171,6 +180,7 @@ static void fixima(){
     DBG("new image: %dx%d", raw_width, raw_height);
     cc_unlock_shm();
     unlock();
+    TIMESTAMP("All OK");
 }
 
 // functions for processCAM finite state machine
@@ -216,12 +226,14 @@ static inline void cameracapturestate(){ // capturing - wait for exposition ends
                     camstate = CAMERA_ERROR;
                     return;
                 }else{
+                    TIMESTAMP("Fill FITS header");
                     ima->gotstat = 0; // fresh image without statistics - recalculate when save
                     ima->timestamp = sl_dtime(); // set timestamp
                     fillFITSheader(ima);
                     ++ima->imnumber; // increment counter
                 }
                 cc_unlock_shm();
+                TIMESTAMP("Captured and unlocked");
             }
             camstate = CAMERA_FRAMERDY;
         }
@@ -249,7 +261,7 @@ static void* processCAM(_U_ void *d){
             printf("\t\t\tprocessCAM(), 5 seconds\n");
         }
 #endif
-        usleep(100);
+        usleep(1000);
         if(tremain < 0.5 && tremain > 0.) usleep(tremain*1e6);
         if(lock()){
             // log
@@ -276,22 +288,17 @@ static void* processCAM(_U_ void *d){
                 unlock();
                 continue;
             }
+            unlock();
             cc_camera_state curstate = camstate;
             switch(curstate){
-                case CAMERA_IDLE:
-                    cameraidlestate();
-                break;
                 case CAMERA_CAPTURE:
                     cameracapturestate();
                 break;
-                case CAMERA_FRAMERDY:
-    // do nothing: when `server` got this state it sends "expstate=2" to all clients and changes state to IDLE
-                break;
-                case CAMERA_ERROR:
-    // do nothing: when `server` got this state it sends "expstate=3" to all clients and changes state to IDLE
+                default:
+                    cameraidlestate();
                 break;
             }
-            unlock();
+
         }
     }
     return NULL;
@@ -363,9 +370,7 @@ static cc_hresult restarthandler(_U_ int fd, _U_ const char *key, _U_ const char
 static cc_hresult imsizehandler(int fd, const char *key, _U_ const char *val){
     char buf[64];
     if(!ima) return CC_RESULT_FAIL;
-    // send image width/height in pixels
-    if(0 == strcmp(key, CC_CMD_IMHEIGHT)) snprintf(buf, 63, CC_CMD_IMHEIGHT "=%d", ima->h);
-    else snprintf(buf, 63, CC_CMD_IMWIDTH "=%d", ima->w);
+    snprintf(buf, 63, "%s=%d", key, (0 == strcmp(key, CC_CMD_IMHEIGHT)) ? ima->h : ima->w);
     if(!cc_sendstrmessage(fd, buf)) return CC_RESULT_DISCONNECTED;
     return CC_RESULT_SILENCE;
 }
@@ -488,19 +493,21 @@ static cc_hresult camfanhandler(int fd, _U_ const char *key, _U_ const char *val
 }
 const char *shutterstr[] = {"open", "close", "expose @high", "expose @low"};
 static cc_hresult shutterhandler(_U_ int fd, _U_ const char *key, const char *val){
+    char buf[64];
     if(!camera->shuttercmd) return CC_RESULT_FAIL;
-    if(val){
-        int x = atoi(val);
-        if(x < 0 || x >= SHUTTER_AMOUNT) return CC_RESULT_BADVAL;
-        int r = camera->shuttercmd((cc_shutter_op)x);
-        if(r){
-           LOGMSG("Shutter command '%s'", shutterstr[x]);
-        }else{
-            LOGWARN("Can't run shutter command '%s'", shutterstr[x]);
-            return CC_RESULT_FAIL;
-        }
+    if(!val) return CC_RESULT_BADVAL;
+    int x = atoi(val);
+    if(x < 0 || x >= SHUTTER_AMOUNT) return CC_RESULT_BADVAL;
+    int r = camera->shuttercmd((cc_shutter_op)x);
+    if(r){
+       LOGMSG("Shutter command '%s'", shutterstr[x]);
+    }else{
+        LOGWARN("Can't run shutter command '%s'", shutterstr[x]);
+        return CC_RESULT_FAIL;
     }
-    return CC_RESULT_OK;
+    snprintf(buf, 63, "%s=%d", key, x);
+    if(!cc_sendstrmessage(fd, buf)) return CC_RESULT_DISCONNECTED;
+    return CC_RESULT_SILENCE;
 }
 static cc_hresult confiohandler(_U_ int fd, _U_ const char *key, _U_ const char *val){
     char buf[64];
@@ -613,17 +620,18 @@ static cc_hresult expstatehandler(int fd, _U_ const char *key, const char *val){
         int n = atoi(val);
         if(n == CAMERA_IDLE){ // cancel expositions
             camflags |= FLAG_CANCEL;
-            return CC_RESULT_OK;
         }
         else if(n == CAMERA_CAPTURE){ // start exposition
             if(GP->exptime < 1e-9){ // need exposition time to be set
                 return CC_RESULT_FAIL;
             }
-            if(camstate == CAMERA_CAPTURE) return CC_RESULT_BUSY; // in progress
+            if(camstate == CAMERA_CAPTURE){
+                DBG("Capture in process when user ask '%s=%s'", key, val);
+                return CC_RESULT_BUSY; // in progress
+            }
             TIMESTAMP("Get FLAG_STARTCAPTURE");
             TIMEINIT();
             camflags |= FLAG_STARTCAPTURE;
-            return CC_RESULT_OK;
         }
         else return CC_RESULT_BADVAL;
     }
@@ -657,6 +665,16 @@ static cc_hresult _8bithandler(int fd, _U_ const char *key, const char *val){
     if(!cc_sendstrmessage(fd, buf)) return CC_RESULT_DISCONNECTED;
     return CC_RESULT_SILENCE;
 }
+static cc_hresult imnohandler(int fd, const char *key, const char _U_ *val){
+    if(!ima) return CC_RESULT_FAIL;
+    char buf[64];
+    cc_lock_shm(TRUE);
+    int No = ima->imnumber;
+    cc_unlock_shm();
+    snprintf(buf, 63, "%s=%d", key, No);
+    if(!cc_sendstrmessage(fd, buf)) return CC_RESULT_DISCONNECTED;
+    return CC_RESULT_SILENCE;
+}
 static cc_hresult fastspdhandler(int fd, _U_ const char *key, const char *val){
     char buf[64];
     if(!camera->setfastspeed) return CC_RESULT_FAIL;
@@ -955,6 +973,7 @@ static cc_handleritem items[] = {
     {chkcc,  camsetNhandler, CC_CMD_CAMDEVNO},
     {chkcc,  camfanhandler, CC_CMD_CAMFANSPD},
     {chkcc,  exphandler, CC_CMD_EXPOSITION},
+    {chkcc,  imnohandler, CC_CMD_IMNUMBER},
     {chkcc,  binhandler, CC_CMD_HBIN},
     {chkcc,  binhandler, CC_CMD_VBIN},
     {chkcc,  temphandler, CC_CMD_CAMTEMPER},
@@ -1078,9 +1097,7 @@ void server(int sock, int imsock){
             printf("\t\t\tserver(), 5 seconds\n");
         }
 #endif
-        DBG("poll");
         poll(poll_set, nfd, 1); // max timeout - 1ms
-        DBG("chk imsock");
         //if(imsock > -1 && sl_canread(imsock) > 0){
         if(imsock > -1 && (poll_set[1].revents & POLLIN)){
             //uint8_t buf[32];
@@ -1113,7 +1130,6 @@ void server(int sock, int imsock){
                 }
             }else{WARN("accept()"); DBG("disconnected");}
         }
-        DBG("chk cmd sock");
         if(poll_set[0].revents & POLLIN){ // check main for accept()
             struct sockaddr_in addr;
             socklen_t len = sizeof(addr);
@@ -1147,11 +1163,11 @@ void server(int sock, int imsock){
             camstate = CAMERA_IDLE;
         }
 #endif
-        DBG("scan connections");
         // scan connections
         for(int fdidx = 2; fdidx < nfd; ++fdidx){
             if((poll_set[fdidx].revents & POLLIN) == 0) continue;
             int fd = poll_set[fdidx].fd;
+            DBG("Got active fd=%d", fd);
             cc_strbuff *curbuff = buffers[fdidx-1];
             int disconnected = 0;
             if(cc_read2buf(fd, curbuff)){
@@ -1173,7 +1189,6 @@ void server(int sock, int imsock){
                 --nfd;
             }
         }
-        DBG("Check infty");
         // check `infty`
         if(camstate != CAMERA_CAPTURE && infty){ // start new exposition
             // mark to start new capture in infinity loop when at least one client connected
@@ -1183,7 +1198,6 @@ void server(int sock, int imsock){
                 TIMEINIT();
             }
         }
-        DBG("OK ->");
     }
     WARNX("SERVER STOPPED!");
     camstop();