Hello Tello Pilot!
Join our DJI Tello community & remove this banner.
Sign up

Meaning of TOF distance


New member
Nov 9, 2018
Reaction score
I'm new to Tello and I'm trying to write a simple program where the Tello flies toward a wall and stops (or turns) before hitting it.
Using the official SDK (https://dl-cdn.ryzerobotics.com/downloads/tello/20180910/Tello SDK Documentation EN_1.3.pdf), I send a "tof?" message.
The return values seems unpredictable. I thought it meant the distance between the Tello and an object in front of it, but I get numbers that do not make sense..

Am I misunderstanding the meaning of "TOF distance"? or is there some problem with my drone's sensors?

thank you.
Hi there,

I'm pretty sure the TOF sensor you're talking about is the one located underneath the Tello, so it probably measures the distance to the floor, NOT the distance to a nearby wall :(

Hopes it helps
As far as I understood it based on a few flights: "height" is the height above the starting point, "tof" is the current distance to ground.

Eg. you started from a 50 cm high table (height = 50, tof = 50), you flew off the table (height = 50, tof = 100) and descended 50 cm (height = 0, tof = 50).
So what? Is it possible to measure the distance forward to the wall (if there are no signes on it)?
Last edited:

New Posts

Members online

No members online now.

Forum statistics

Latest member

New Posts