> For the complete documentation index, see [llms.txt](https://docs.premium-modellbau.de/premium-modellbau-portal-fuer-anleitungen/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.premium-modellbau.de/premium-modellbau-portal-fuer-anleitungen/matek/matek-systems-ubersicht/matek-sensoren/3901-l0x-optical-flow-und-lidar-sensor.md).

# 3901-L0X Optical Flow und Lidar Sensor

## Link zum Premium-Modellbau Shop

{% embed url="<https://www.premium-modellbau.de/matek-3901-l0x-optical-flow-und-lidar-sensor-fuer-inav>" %}
Matek 3901-L0X Optical Flow und Lidar Sensor für INAV im Premium-Modellbau Shop
{% endembed %}

**Montage und Inbetriebnahme:**

Bitte beachten Sie unbedingt den angegebenen Spannungsbereich für das jeweilige Board. Eine zu hohe Spannung wird die angeschlossenen Komponenten beschädigen.

**This module works with INAV firmware(2.2.x or latest) only**

**Specifications**

* Optical Flow: PMW3901
* Lidar: VL53L0X
* Interface UART
* Protocol: INAV MSP
* Working Range: 8cm\~200cm
* Field of view: 42 degree(PMW3901), 27 degree(VL53L0X)
* Minimum Illumination >60Lux
* Input voltage: 4.5\~5.5V
* Power Consumption: 40mA
* Size: 36\*12mm, 2g

**Tips**

* Make sure Optical Flow lens to ground >2cm for opflow initialization while FC starting up.
* Maximum range of VL53L0X is 2m, Altitude hold 0\~2m @ throttle 0\~100% if VL53L0X is enabled.
* Any unused UART of FC supports it
* Sonar connection (Trig & Echo) has not been implemented
* **If your flight controller doesn’t have a barometer detected, you won’t be able to select “NAV ALTHOLD” in modes tab.**

![https://bilder.premium-modellbau.de/bilder/produkte/klein/ASPD-7002-5.jpg](/files/VzxMPbFPCQW6SsyPslwf)