# Replacement Starling 2 Max ToF Board

Source: https://forum.modalai.com/topic/5178/replacement-starling-2-max-tof-board
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2026-04-21 17:52:37 UTC by Myles Levine
Replies: 5 · Views: 383

## Myles Levine · 2026-04-21 17:52:37 UTC

Hello,

I have reason to believe that I need to replace the ToF sensor on my drone. It has been getting inconsistent height estimates from that sensor, VIO says 1m and the ToF sensor says 0.01m, which has lead to the drone rising higher than desired. Additionally, looking at the ToF sensor there appears to be a discoloration on a portion of the sensor.

Where can I get a replacement Starling 2 Max ToF board?

## Reply by Alex Kushleyev (ModalAI staff) · 2026-04-22 17:42:42 UTC

@Myles-Levine , you can purchase the TOF sensor here : https://www.modalai.com/products/m0178?variant=48528287793456

## Reply by Myles Levine · 2026-04-22 23:31:09 UTC (in reply to Alex Kushleyev)

@Alex-Kushleyev Thank you for the link, but none of those parts appear to be what is on my drone. It should be this board
 https://docs.modalai.com/voxl2-mini-d0013/#flir-lepton 
with this component 
https://www.st.com/resource/en/datasheet/vl53l1x.pdf

## Reply by Alex Kushleyev (ModalAI staff) · 2026-04-22 23:35:29 UTC (in reply to Myles Levine)

@Myles-Levine , sorry I thought you were referring to the other TOF sensor.

You will need a new M0187 board : https://docs.modalai.com/M0187/ . Please reach out to us via this form https://www.modalai.com/pages/contact-us , since we don't have that part available on the official page.

Is your Lepton sensor working properly?

Alex

## Reply by Myles Levine · 2026-04-22 23:46:23 UTC (in reply to Alex Kushleyev)

@Alex-Kushleyev Thanks. I
 suspect the sensor is broken. In QGC I can see the distance_sensor value not making sense, lower values for some things that are further away, etc. I tested it against a second drone, and those values made much more sense, so I believe the Lepton is broken. 
Plus, there's a visible discoloration one of the lenses, about 1/3 of it looks green rather than amber.

## Reply by Alex Kushleyev (ModalAI staff) · 2026-04-23 18:15:34 UTC (in reply to Myles Levine)

Hi @Myles-Levine ,

I just want to double check something to make sure there is no confusion.
- The lepton sensor is an IR (thermal) camera. it does not measure range. The lepton sensor plugs into the large square socket that is mounted to the M0157 / M0187 board (they are very similar).
- The infrared TOF sensor is a smaller (rectangular) sensor, which is marked as U1 on M0187 : https://docs.modalai.com/M0187/ .

Have you checked whether the Lepton sensor is working using `voxl-portal`, which would allow you to look at the IR image coming from the sensor?

Alex