# Tello drone does not execute navigation

**URL:** <https://community.droneblocks.io/t/tello-drone-does-not-execute-navigation/135>\
**Category:** DroneBlocks Support\
**Created:** [May 25, 2021, 12:20pm UTC](https://community.droneblocks.io/t/tello-drone-does-not-execute-navigation/135 "2021-05-25T12:20:35Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![syoung](https://avatars.discourse-cdn.com/v4/letter/s/dfb087/32.png) [@syoung](https://community.droneblocks.io/u/syoung)\
**Post date:** [May 25, 2021, 12:20pm UTC](https://community.droneblocks.io/t/tello-drone-does-not-execute-navigation/135/1 "2021-05-25T12:20:36Z")

</div>

Hi, I am connected to a Tello drone through the Chrome extension, and I can get it to takeoff, do flips, and land. But I cannot get it to execute any navigation commands. When I put a “fly forward/rt/lf/bck” it just hovers. Same for the Curve xyz command. The “Abort” button also works, thankfully.  
–Steve

---

<div class="post-metadata">

**Author:** ![mcbeth1307](https://avatars.discourse-cdn.com/v4/letter/m/e19adc/32.png) [@mcbeth1307](https://community.droneblocks.io/u/mcbeth1307)\
**Post date:** [May 25, 2021, 1:24pm UTC](https://community.droneblocks.io/t/tello-drone-does-not-execute-navigation/135/2 "2021-05-25T13:24:59Z")

</div>

Hi syoung,  
problably you have the same problem like:

> [@Drone Blocks will not fly My Missions](https://community.droneblocks.io/t/drone-blocks-will-not-fly-my-missions/106):
>
> Drone Blocks will not fly My Missions, Tello takes off and hovers indefinitely until abort mission is selected. Same issue with IOS, Android and Chrome App/Laptop on 2 Tello’s with current firmware on Tello’s and updated Apps on devices. I can create and Launch Missions OK on all 3 devices but if I save the mission then select it from My Missions Tello just hovers in place. Same with any of the missions copied from the courses. Have tried a several combos with the Wi-Fi dance (switch between…

---

<div class="post-metadata">

**Author:** ![syoung](https://avatars.discourse-cdn.com/v4/letter/s/dfb087/32.png) [@syoung](https://community.droneblocks.io/u/syoung)\
**Post date:** [May 25, 2021, 3:24pm UTC](https://community.droneblocks.io/t/tello-drone-does-not-execute-navigation/135/3 "2021-05-25T15:24:53Z")

</div>

Further tests have gotten the drone to do the curve, but only by using values over 50 cm for X & Y. The Z values we initially left at “0” but it seemed to work better if Z1= 20 & Z2 = -20. Go figure. It seems if the values are too low, it will not execute them, and we were working in a small room. Still playing with it.

---

<div class="post-metadata">

**Author:** ![syoung](https://avatars.discourse-cdn.com/v4/letter/s/dfb087/32.png) [@syoung](https://community.droneblocks.io/u/syoung)\
**Post date:** [May 25, 2021, 5:39pm UTC](https://community.droneblocks.io/t/tello-drone-does-not-execute-navigation/135/4 "2021-05-25T17:39:00Z")

</div>

Centimeters are the better units to use because they require larger values, which the Tello drone seems to want to work with.

---

<div class="post-metadata">

**Author:** ![dbaldwin](https://avatars.discourse-cdn.com/v4/letter/d/d2c977/32.png) [@dbaldwin](https://community.droneblocks.io/u/dbaldwin)\
**Post date:** [May 27, 2021, 1:29pm UTC](https://community.droneblocks.io/t/tello-drone-does-not-execute-navigation/135/5 "2021-05-27T13:29:53Z")

</div>

Thanks for reporting this. We could certainly do a better job of providing feedback to the user if distances are too short or too long for Tello to execute. I will talk to the team about this for a future release.