diff --git a/application/tom_modem/src/main.c b/application/tom_modem/src/main.c
index e659fd6..91133b6 100644
--- a/application/tom_modem/src/main.c
+++ b/application/tom_modem/src/main.c
@@ -142,6 +142,8 @@ int run_op(PROFILE_T *profile,FDS_T *fds)
     {
     case AT_OP:
         return at(profile,fds);
+    case BINARY_AT_OP:
+        return binary_at(profile,fds);
     case SMS_READ_OP:
         return sms_read(profile,fds);
     case SMS_SEND_OP:
diff --git a/application/tom_modem/src/main.h b/application/tom_modem/src/main.h
index 77b1c6e..a1907b2 100644
--- a/application/tom_modem/src/main.h
+++ b/application/tom_modem/src/main.h
@@ -22,6 +22,8 @@ extern PROFILE_T s_profile;   // global profile
 
 extern  int at(PROFILE_T *profile,FDS_T *fds);
 
+extern int binary_at(PROFILE_T *profile,FDS_T *fds);
+
 extern  int sms_read(PROFILE_T *profile,FDS_T *fds);
 
 extern  int sms_send(PROFILE_T *profile,FDS_T *fds);
diff --git a/application/tom_modem/src/modem_types.h b/application/tom_modem/src/modem_types.h
index 71a4d7c..0deb0dd 100644
--- a/application/tom_modem/src/modem_types.h
+++ b/application/tom_modem/src/modem_types.h
@@ -34,6 +34,8 @@
 //operations
 #define AT_OP_S 'a'
 #define AT_OP_L "at"
+#define BINARY_AT_OP_S 'b'
+#define BINARY_AT_OP_L "binary_at"
 #define SMS_READ_OP_S 'r'
 #define SMS_READ_OP_L "sms_read"
 #define SMS_SEND_OP_S 's'
@@ -109,6 +111,7 @@ enum ERROR_CODES {
     KEYWORD_NOT_MATCH,
     TIMEOUT_WAITING_NEWLINE,
     INVALID_PARAM,
+    INVALID_HEX,
     UNKNOWN_ERROR,
 };
 
@@ -135,6 +138,7 @@ enum OPTIONS {
 enum OPERATIONS {
     NULL_OP,
     AT_OP,
+    BINARY_AT_OP,
     SMS_READ_OP,
     SMS_SEND_OP,
     SMS_DELETE_OP
diff --git a/application/tom_modem/src/operations.c b/application/tom_modem/src/operations.c
index fcf795f..fce2216 100644
--- a/application/tom_modem/src/operations.c
+++ b/application/tom_modem/src/operations.c
@@ -25,6 +25,48 @@ int at(PROFILE_T *profile,FDS_T *fds)
     user_msg("%s", output);
     return SUCCESS;
 }
+
+int binary_at(PROFILE_T *profile,FDS_T *fds)
+{
+    int w_ret,r_ret,hex_convert_ret;
+    int binary_at_cmd_len;
+    char *binary_at_cmd;
+    char output[COMMON_BUF_SIZE] = {0};
+    if (profile->at_cmd == NULL)
+    {
+        err_msg("AT command is empty");
+        return INVALID_PARAM;
+    }
+
+    if (strlen(profile->at_cmd) % 2 != 0)
+    {
+        err_msg("Invalid AT command length");
+        return INVALID_PARAM;
+    }
+    binary_at_cmd = (char *)malloc(strlen(profile->at_cmd) / 2 + 1);
+    hex_convert_ret = str_to_hex(profile->at_cmd, binary_at_cmd);
+    if (binary_at_cmd == NULL || hex_convert_ret)
+    {
+        err_msg("Binary AT command is empty");
+        return INVALID_PARAM;
+    }
+
+    w_ret = tty_write_raw(fds->fdo, binary_at_cmd);
+    if (w_ret)
+    {
+        return w_ret;
+    }
+    r_ret = tty_read_keyword(fds->fdi, output, COMMON_BUF_SIZE, "OK",profile->timeout);
+    if (r_ret)
+    {
+        dbg_msg("Error sending AT command, error code: %d", r_ret);
+        if (r_ret == COMM_ERROR)
+            return r_ret;
+    }
+    user_msg("%s", output);
+    return SUCCESS;
+}
+
 int sms_delete(PROFILE_T *profile,FDS_T *fds)
 {
     int w_ret,r_ret;
diff --git a/application/tom_modem/src/operations.h b/application/tom_modem/src/operations.h
index 75531b0..b9013b0 100644
--- a/application/tom_modem/src/operations.h
+++ b/application/tom_modem/src/operations.h
@@ -3,8 +3,10 @@
 #include "modem_types.h"
 #include "ttydevice.h"
 #include "utils.h"
+int str_to_hex(char *str, char *hex);
 int tty_open_device(PROFILE_T *profile, FDS_T *fds);
 int tty_read(FILE *fdi, char *output, int len, int soft_timeout);
 int tty_read_keyword(FILE *fdi, char *output, int len, char *key_word, int soft_timeout);
+int tty_write_raw(FILE *fdo, char *input);
 int tty_write(FILE *fdo, char *input);
 #endif
diff --git a/application/tom_modem/src/ttydevice.c b/application/tom_modem/src/ttydevice.c
index 7c042c7..cfc7507 100644
--- a/application/tom_modem/src/ttydevice.c
+++ b/application/tom_modem/src/ttydevice.c
@@ -186,6 +186,20 @@ int tty_read_keyword(FILE *fdi, char *output, int len, char *key_word, int soft_
     return exitcode;
 }
 
+int tty_write_raw(FILE *fdo, char *input)
+{
+    int ret;
+    ret = fputs(input, fdo);
+    fflush(fdo);
+    usleep(100);
+    if (ret < 0)
+    {
+        err_msg("Error writing to tty %d" , ret);
+        return COMM_ERROR;
+    }
+    return SUCCESS;
+}
+
 int tty_write(FILE *fdo, char *input)
 {
     int cmd_len, ret;
@@ -198,14 +212,7 @@ int tty_write(FILE *fdo, char *input)
         return COMM_ERROR;
     }
     snprintf(cmd_line, cmd_len, "%s\r\n", input);
-    ret = fputs(cmd_line, fdo);
+    ret =  tty_write_raw(fdo, cmd_line);
     free(cmd_line);
-    fflush(fdo);
-    usleep(100);
-    if (ret < 0)
-    {
-        err_msg("Error writing to tty %d" , ret);
-        return COMM_ERROR;
-    }
-    return SUCCESS;
+    return ret;
 }
diff --git a/application/tom_modem/src/utils.c b/application/tom_modem/src/utils.c
index 36a1a49..49b2176 100644
--- a/application/tom_modem/src/utils.c
+++ b/application/tom_modem/src/utils.c
@@ -238,6 +238,8 @@ int match_operation(char *operation_name)
         {
         case AT_OP_S:
             return AT_OP;
+        case BINARY_AT_OP_S:
+            return BINARY_AT_OP;
         case SMS_READ_OP_S:
             return SMS_READ_OP;
         case SMS_SEND_OP_S:
@@ -255,6 +257,10 @@ int match_operation(char *operation_name)
         {
             return AT_OP;
         }
+        else if (strcmp(operation_name, BINARY_AT_OP_L) == 0)
+        {
+            return BINARY_AT_OP;
+        }
         else if (strcmp(operation_name, SMS_READ_OP_L) == 0)
         {
             return SMS_READ_OP;
@@ -337,16 +343,36 @@ int usage(char* name)
     err_msg("  -b, --baud_rate <baud rate>  Baud rate Default: 115200 Supported: 4800,9600,19200,38400,57600,115200");
     err_msg("  -B, --data_bits <data bits>  Data bits Default: 8 Supported: 5,6,7,8");
     err_msg("  -t, --timeout <timeout>  Timeout Default: 3");
-    err_msg("  -o, --operation <operation>  Operation(at[a:defualt], sms_read[r], sms_send[s], sms_delete[d])");
+    err_msg("  -o, --operation <operation>  Operation(at[a:defualt],binary_at[b], sms_read[r], sms_send[s], sms_delete[d])");
     err_msg("  -D, --debug Debug mode Default: off");
     err_msg("  -p, --sms_pdu <sms pdu>  SMS PDU");
     err_msg("  -i, --sms_index <sms index>  SMS index");
     err_msg("Example:");
     err_msg("  %s -c ATI -d /dev/ttyUSB2 -b 115200 -B 8 -o at #advance at mode set bautrate and data bit", name);
     err_msg("  %s -c ATI -d /dev/ttyUSB2 # normal at mode", name);
+    err_msg("  %s -c ATI -d /dev/ttyUSB2 -o binary_at -c 4154490D0A # means sending ATI to ttyUSB2", name);
     err_msg("  %s -d /dev/mhi_DUN -o r # read sms", name);
     exit(-1);
 }
+
+int str_to_hex(char *str, char *hex)
+{
+    int len = strlen(str)/2;
+    int high,low;
+    for (int i = 0; i < len; i++)
+    {
+        high = char_to_hex(str[i*2]);
+        low = char_to_hex(str[i*2+1]);
+        if (high == -1 || low == -1)
+        {
+            return INVALID_HEX;
+        }
+        hex[i] = (high << 4) | low;
+        dbg_msg("hex[%d]: %x", i, hex[i]);
+    }
+    return SUCCESS;
+}
+
 void dump_profile()
 {
     dbg_msg("AT command: %s", s_profile.at_cmd);