From 12d2f42e41be9c398ac3bffb1fd1d7df0480b970 Mon Sep 17 00:00:00 2001
From: Oleg Kalachev <okalachev@gmail.com>
Date: Sun, 21 Oct 2018 02:36:09 +0300
Subject: [PATCH] docs: little update

---
 docs/optical_flow.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docs/optical_flow.md b/docs/optical_flow.md
index 94a7250a..01c37318 100644
--- a/docs/optical_flow.md
+++ b/docs/optical_flow.md
@@ -14,6 +14,12 @@
 <arg name="vl53l1x" default="true"/>
 ```
 
+Проверить работу лазерного дальномера можно с помощью команды:
+
+```bash
+rostopic echo mavros/distance_sensor/rangefinder_3_sub
+```
+
 Необходимо включить Optical Flow:
 
 ```xml