diff --git a/src/p7/args.c b/src/p7/args.c
index bc724df..156fc0f 100644
--- a/src/p7/args.c
+++ b/src/p7/args.c
@@ -51,6 +51,7 @@ static const char help_main[] =
 "   optimize     Optimize the distant filesystem.\n"
 "   list         List files on the distant filesystem.\n"
 "   info         Dump info about the calculator.\n"
+"   idle         Do nothing (only start or end the communication)\n"
 "\n"
 "General options:\n"
 "  -h, --help        Display the help page of the (sub)command and quit.\n"
@@ -151,6 +152,14 @@ static const char help_listcom[] =
 "List serial devices.\n"
 FOOT;
 
+/* Idle */
+static const char help_idle[] =
+"Usage: " QUOTE(BIN) " idle\n"
+"Only initialize or end the communication.\n"
+"This subcommand is useful when used with `--no-init` and/or `--no-exit`.\n"
+"It allows you to prepare the communication state for the next calls, or to\n"
+"end a series of calls, without any side effects.\n"
+FOOT;
 /* ************************************************************************** */
 /*  Main function                                                             */
 /* ************************************************************************** */
@@ -316,6 +325,8 @@ int parse_args(int ac, char **av, args_t *args)
 		/* get filename */
 		args->filename = aav[1];
 		args->dirname = s_dir;
+	} else if (!strcmp(aav[0], "idle") || !strcmp(aav[0], "laze")) {
+		sub_init(idle, 0)
 	} else {
 		/* unknown subcommand ! */
 		log("Unknown subcommand '%s'.\n", aav[0]);
diff --git a/src/p7/main.c b/src/p7/main.c
index 16d1e39..9eb669b 100644
--- a/src/p7/main.c
+++ b/src/p7/main.c
@@ -265,6 +265,8 @@ int main(int ac, char **av)
 		case mn_info:
 			err = dump(handle);
 			break;
+		case mn_idle:
+			break; /* time! */
 	}
 
 	/* put error */
diff --git a/src/p7/main.h b/src/p7/main.h
index 77f7548..786ed42 100644
--- a/src/p7/main.h
+++ b/src/p7/main.h
@@ -27,7 +27,7 @@
 /* Menus */
 typedef enum {
 	mn_send, mn_get, mn_copy, mn_del, mn_list, mn_reset,
-	mn_optimize, mn_info
+	mn_optimize, mn_info, mn_idle
 } menu_t;
 
 /* Arguments */