diff --git a/CMakeLists.txt b/CMakeLists.txt
index f738a90..6a8f54f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.0)
 set(PROJ tty_term)
-set(MINOR_VERSION "3")
-set(MID_VERSION "1")
+set(MINOR_VERSION "1")
+set(MID_VERSION "2")
 set(MAJOR_VERSION "0")
 set(VERSION "${MAJOR_VERSION}.${MID_VERSION}.${MINOR_VERSION}")
 
@@ -36,7 +36,7 @@ endif()
 
 ###### pkgconfig ######
 # pkg-config modules (for pkg-check-modules)
-set(MODULES ncurses readline usefull_macros)
+set(MODULES ncurses readline usefull_macros>=0.3.2)
 
 # find packages:
 find_package(PkgConfig REQUIRED)
@@ -67,9 +67,10 @@ message("Install dir prefix: ${CMAKE_INSTALL_PREFIX}")
 # exe file
 add_executable(${PROJ} ${SOURCES})
 # -I
-include_directories(${${PROJ}_INCLUDE_DIRS})
+target_include_directories(${PROJ} PUBLIC ${${PROJ}_INCLUDE_DIRS})
 # -L
-link_directories(${${PROJ}_LIBRARY_DIRS})
+target_link_directories(${PROJ} PUBLIC ${${PROJ}_LIBRARY_DIRS})
+
 # -D
 add_definitions(${CFLAGS} -DLOCALEDIR=\"${LOCALEDIR}\" -DPROJECT=\"${PROJ}\"
         -DPACKAGE_VERSION=\"${VERSION}\" -DGETTEXT_PACKAGE=\"${PROJ}\"
diff --git a/Changelog b/Changelog
new file mode 100644
index 0000000..603aaf7
--- /dev/null
+++ b/Changelog
@@ -0,0 +1,3 @@
+Mon Apr 28 12:33:57 MSK 2025
+
+Changed to libusefull_macros v.0.3.2.
diff --git a/cmdlnopts.c b/cmdlnopts.c
index 65530c3..1468e2b 100644
--- a/cmdlnopts.c
+++ b/cmdlnopts.c
@@ -43,7 +43,7 @@ glob_pars const Gdefault = {
  * Define command line options by filling structure:
  *  name    has_arg flag    val     type        argptr          help
 */
-static myoption cmdlnopts[] = {
+static sl_option_t cmdlnopts[] = {
     // set 1 to param despite of its repeating number:
     {"help",    NO_ARGS,    NULL,   'h',    arg_int,    APTR(&help),        _("show this help")},
     {"speed",   NEED_ARG,   NULL,   's',    arg_int,    APTR(&G.speed),     _("baudrate (default: 9600)")},
@@ -54,6 +54,7 @@ static myoption cmdlnopts[] = {
     {"socket",  NO_ARGS,    NULL,   'S',    arg_int,    APTR(&G.socket),    _("open socket")},
     {"dumpfile",NEED_ARG,   NULL,   'd',    arg_string, APTR(&G.dumpfile),  _("dump data to this file")},
     {"format",  NEED_ARG,   NULL,   'f',    arg_string, APTR(&G.serformat), _("tty format (default: 8N1)")},
+    {"exclusive",NO_ARGS,   NULL,   'x',    arg_int,    APTR(&G.exclusive), _("open serial in exclusive mode")},
     end_option
 };
 
@@ -67,10 +68,10 @@ static myoption cmdlnopts[] = {
 glob_pars *parse_args(int argc, char **argv){
     void *ptr = memcpy(&G, &Gdefault, sizeof(G)); assert(ptr);
     // format of help: "Usage: progname [args]\n"
-    change_helpstring(_(PROJECT " version " PACKAGE_VERSION "\nUsage: %s [args]\n\n\tWhere args are:\n"));
+    sl_helpstring(_(PROJECT " version " PACKAGE_VERSION "\nUsage: %s [args]\n\n\tWhere args are:\n"));
     // parse arguments
-    parseargs(&argc, &argv, cmdlnopts);
-    if(help) showhelp(-1, cmdlnopts);
+    sl_parseargs(&argc, &argv, cmdlnopts);
+    if(help) sl_showhelp(-1, cmdlnopts);
     if(argc > 0){
         WARNX("Wrong arguments:\n");
         for(int i = 0; i < argc; i++)
diff --git a/cmdlnopts.h b/cmdlnopts.h
index 44a4219..e01b252 100644
--- a/cmdlnopts.h
+++ b/cmdlnopts.h
@@ -27,6 +27,7 @@ typedef struct{
     int speed;          // baudrate
     int tmoutms;        // timeout for select() in ms
     int socket;         // open socket
+    int exclusive;      // open serial in exclusive mode
     char *dumpfile;     // file to save dump
     char *ttyname;      // device name
     char *eol;          // end of line: \r (CR), \rn (CR+LF) or \n (LF): "r", "rn", "n"
diff --git a/main.c b/main.c
index 7800e0d..9a9bedc 100644
--- a/main.c
+++ b/main.c
@@ -38,7 +38,7 @@ void signals(int signo){
 
 int main(int argc, char **argv){
     glob_pars *G = NULL; // default parameters see in cmdlnopts.c
-    initial_setup();
+    sl_init();
 #ifdef EBUG
     OPENLOG("debug.log", LOGLEVEL_ANY, 1);
 #endif
@@ -71,6 +71,7 @@ int main(int argc, char **argv){
         conndev.speed = G->speed;
         conndev.port = strdup(G->serformat); // `port` of tty is serial format
         DBG("speed=%d, format=%s", conndev.speed, conndev.port);
+        conndev.exclusive = G->exclusive;
     }
     if(!opendev(&conndev, G->dumpfile)){
         signals(0);
diff --git a/popup_msg.h b/popup_msg.h
index ff5e031..bcc94d4 100644
--- a/popup_msg.h
+++ b/popup_msg.h
@@ -18,6 +18,7 @@
 
 #pragma once
 #include <curses.h>
+#include <sys/ttydefaults.h>
 
 #define QUIT        CTRL('Q')
 #define ESCAPE      CTRL('[')
diff --git a/ttysocket.c b/ttysocket.c
index 0d86848..710a79c 100644
--- a/ttysocket.c
+++ b/ttysocket.c
@@ -81,11 +81,11 @@ static int waittoread(int fd){
 // get data drom TTY
 static uint8_t *getttydata(int *len){
     if(!device || !device->dev) return NULL;
-    TTY_descr2 *D = device->dev;
+    sl_tty_t *D = device->dev;
     if(D->comfd < 0) return NULL;
     int L = 0;
     int length = D->bufsz - 1; // -1 for terminating zero
-    uint8_t *ptr = D->buf;
+    uint8_t *ptr = (uint8_t*)D->buf;
     int s = 0;
     do{
         if(!(s = waittoread(D->comfd))) break;
@@ -106,19 +106,19 @@ static uint8_t *getttydata(int *len){
     if(len) *len = L;
     if(!L) return NULL;
     DBG("buffer len: %zd, content: =%s=", D->buflen, D->buf);
-    return D->buf;
+    return (uint8_t*)D->buf;
 }
 
 static uint8_t *getsockdata(int *len){
     if(!device || !device->dev) return NULL;
-    TTY_descr2 *D = device->dev;
+    sl_tty_t *D = device->dev;
     if(D->comfd < 0) return NULL;
     uint8_t *ptr = NULL;
     int n = waittoread(D->comfd);
     if(n == 1){
         n = read(D->comfd, D->buf, D->bufsz-1);
         if(n > 0){
-            ptr = D->buf;
+            ptr = (uint8_t*)D->buf;
             ptr[n] = 0;
             D->buflen = n;
             DBG("got %d: ..%s..", n, ptr);
@@ -173,7 +173,7 @@ int SendData(const uint8_t *data, size_t len){
     if(0 == pthread_mutex_lock(&device->mutex)){
         switch(device->type){
             case DEV_TTY:
-                if(write_tty(device->dev->comfd, (const char*)data, len)) ret = 0;
+                if(sl_tty_write(device->dev->comfd, (const char*)data, len)) ret = 0;
                 else ret = len;
             break;
             case DEV_NETSOCKET:
@@ -197,10 +197,10 @@ int SendData(const uint8_t *data, size_t len){
 
 static const int socktypes[] = {SOCK_STREAM, SOCK_RAW, SOCK_RDM, SOCK_SEQPACKET, SOCK_DCCP, SOCK_PACKET, SOCK_DGRAM, 0};
 
-static TTY_descr2* opensocket(){
+static sl_tty_t* opensocket(){
     if(!device) return FALSE;
-    TTY_descr2 *descr = MALLOC(TTY_descr2, 1); // only for `buf` and bufsz/buflen
-    descr->buf = MALLOC(uint8_t, BUFSIZ);
+    sl_tty_t *descr = MALLOC(sl_tty_t, 1); // only for `buf` and bufsz/buflen
+    descr->buf = MALLOC(char, BUFSIZ);
     descr->bufsz = BUFSIZ;
     // now try to open a socket
     descr->comfd = -1;
@@ -266,108 +266,20 @@ static TTY_descr2* opensocket(){
     return descr;
 }
 
-static char *parse_format(const char *iformat, tcflag_t *flags){
-    tcflag_t f = 0;
-    if(!iformat){ // default
-        *flags = CS8;
-        return strdup("8N1");
-    }
-    if(strlen(iformat) != 3) goto someerr;
-    switch(iformat[0]){
-        case '5':
-            f |= CS5;
-        break;
-        case '6':
-            f |= CS6;
-        break;
-        case '7':
-            f |= CS7;
-        break;
-        case '8':
-            f |= CS8;
-        break;
-        default:
-            goto someerr;
-    }
-    switch(iformat[1]){
-        case '0': // always 0
-            f |= PARENB | CMSPAR;
-        break;
-        case '1': // always 1
-            f |= PARENB | CMSPAR | PARODD;
-        break;
-        case 'E': // even
-            f |= PARENB;
-        break;
-        case 'N': // none
-        break;
-        case 'O': // odd
-            f |= PARENB | PARODD;
-        break;
-        default:
-            goto someerr;
-    }
-    switch(iformat[2]){
-        case '1':
-        break;
-        case '2':
-            f |= CSTOPB;
-        break;
-        default:
-            goto someerr;
-    }
-    *flags = f;
-    return strdup(iformat);
-someerr:
-    WARNX(_("Wrong USART format \"%s\"; use NPS, where N: 5..8; P: N/E/O/1/0, S: 1/2"), iformat);
-    return NULL;
-}
-
-static TTY_descr2* opentty(){
+static sl_tty_t* opentty(){
     if(!device->name){
         /// Отсутствует имя порта
         WARNX(_("Port name is missing"));
         return NULL;
     }
-    TTY_descr2 *descr = MALLOC(TTY_descr2, 1);
-    descr->portname = strdup(device->name);
-    descr->speed = device->speed;
-    tcflag_t flags;
-    descr->format = parse_format(device->port, &flags);
-    if(!descr->format) goto someerr;
-    descr->buf = MALLOC(uint8_t, 512);
-    descr->bufsz = 511;
-    if((descr->comfd = open(descr->portname, O_RDWR|O_NOCTTY)) < 0){
-        WARN(_("Can't use port %s"), descr->portname);
-        goto someerr;
+    sl_tty_t *descr = sl_tty_new(device->name, device->speed, 4096);
+    if(!descr){
+        WARN("Can't init %s", device->name);
+        return NULL;
     }
-    if(ioctl(descr->comfd, TCGETS2, &descr->oldtty)){
-        WARN(_("Can't get port config"));
-        goto someerr;
-    }
-    descr->tty = descr->oldtty;
-    descr->tty.c_lflag = 0; // ~(ICANON | ECHO | ECHOE | ISIG)
-    descr->tty.c_iflag = 0; // don't do any changes in input stream
-    descr->tty.c_oflag = 0; // don't do any changes in output stream
-    descr->tty.c_cflag = BOTHER | flags |CREAD|CLOCAL;
-    descr->tty.c_ispeed = device->speed;
-    descr->tty.c_ospeed = device->speed;
-    if(ioctl(descr->comfd, TCSETS2, &descr->tty)){
-        WARN(_("Can't set new port config"));
-        goto someerr;
-    }
-    ioctl(descr->comfd, TCGETS2, &descr->tty);
-    if(descr->tty.c_ispeed != (speed_t)device->speed || descr->tty.c_ospeed != (speed_t)device->speed){
-        WARN(_("Can't set speed %d, got ispeed=%d, ospeed=%d"), device->speed, descr->tty.c_ispeed, descr->tty.c_ospeed);
-        //goto someerr;
-    }
-    device->speed = descr->tty.c_ispeed;
+    descr->format = device->port;
+    descr = sl_tty_open(descr, device->exclusive);
     return descr;
-someerr:
-    FREE(descr->format);
-    FREE(descr->buf);
-    FREE(descr);
-    return NULL;
 }
 
 /**
@@ -430,7 +342,7 @@ void closedev(){
     switch(device->type){
         case DEV_TTY:
             if(device->dev){
-                TTY_descr2 *t = device->dev;
+                sl_tty_t *t = device->dev;
                 ioctl(t->comfd, TCSETS2, &t->oldtty); // return TTY to previous state
                 close(t->comfd);
             }
diff --git a/ttysocket.h b/ttysocket.h
index 39cb81f..3e07bc2 100644
--- a/ttysocket.h
+++ b/ttysocket.h
@@ -24,7 +24,7 @@
 #include <asm-generic/termbits.h>
 #include <stdbool.h>
 #include <stdint.h>
-//#include "dbg.h"
+#include <usefull_macros.h>
 
 typedef enum{ // device: tty terminal, network socket or UNIX socket
     DEV_TTY,
@@ -32,27 +32,16 @@ typedef enum{ // device: tty terminal, network socket or UNIX socket
     DEV_UNIXSOCKET,
 } devtype;
 
-typedef struct {
-    char *portname;         // device filename (should be freed before structure freeing)
-    int speed;              // baudrate in human-readable format
-    char *format;           // format like 8N1
-    struct termios2 oldtty; // TTY flags for previous port settings
-    struct termios2 tty;    // TTY flags for current settings
-    int comfd;              // TTY file descriptor
-    uint8_t *buf;           // buffer for data read
-    size_t bufsz;           // size of buf
-    size_t buflen;          // length of data read into buf
-} TTY_descr2;
-
 typedef struct{
     devtype type;               // type
     char *name;                 // filename (dev or UNIX socket) or server name/IP
-    TTY_descr2 *dev;            // tty serial device
+    sl_tty_t *dev;              // tty serial device
     char *port;                 // port to connect
     int speed;                  // tty speed
     pthread_mutex_t mutex;      // reading/writing mutex
     char eol[3];                // end of line
     char seol[5];               // `eol` with doubled backslash (for print @ screen)
+    int exclusive;
 } chardevice;
 
 uint8_t *ReadData(int *l);