Tag: INAV
-
How to connect APM Power Meter to INAV
This topic was eluding me for some time now. It’s time fix the problem and finally present a short tutorial how to connect 90A APM Power Meter for flight controller boards running Betaflight / INAV software and equipped with Current Meter ADC input. I will not show where to connect APM Power Meter to flight…
-
Using PCA9685 with INAV
The PCA9685 PWM driver working as servo extender is no longer supported in INAV. Use S.BUS output and S.BUS servo extenders instead One of the hardware limitations of flight controllers that usually multirotor users ignores is a number of PWM outputs. To fly a quadcopter you need “only” 4 PWM outputs. Since most FCs have…
-
INAV: how to setup asynchronous gyro
This functionality was removed from the code together with INAV 3. Do not try to set it up, it won’t work. Just flash latest INAV and enjoy the flight without any hassle Your Uncle Good Advice Together with version 1.4, INAV introduced asynchronous gyroscope processing. What is async gyro and why it is useful to…
-
Mastering INAV Accelerometer Calibration – Step-by-Step Guide
One of the most often forgotten tasks required to bring the most of INAV, is good accelerometer calibration. Why? While flight controller software like Betaflight use accelerometer only to compute UAV’s body inclination (Angle and Horizon modes as well as artificial horizon), INAV uses it also for position estimation. INAV not only has to know…
-
PID looptime: why it is not only about frequency
Last 18 months was an extremely good period of time for all mini-quad enthusiasts. Progress, hardware and software both, was just incredible. Who could have guessed that in less than 2 years mini-quads will evolve into main group of drones with such excellent flight characteristics. Just take a look at looptime. When I entered the…
-
How to measure gyro noise frequency with Blackbox
Betaflight (and INAV) lowpass filter tuning can be a hard thing to do if you have not idea what is noise frequency you want to cancel. Sure, you can blind test or read tutorials. But what if I tell you, you can measure it quite precisely using only Blackbox logs? Or measure rotation speed of…
-
How to tune PID I-term on a FPV drone
With this entry I want to initiate short series of articles showing how to tune multirotor / quadcopter PID controller. Let’s call it a continuation of Blackbox series, but this time I will not relay only on Blackbox data. Yes, I will show few examples how given scenarios looks on Blackbox logs, but all steps…
-
Hands-on: Beitian BN-880 GPS module
Looking for a decent replacement for my u-blox NEO-6M GPS modules I came by super cheap, Chinese, Beitian BN-880 modules from Banggood. According to information found in the internet, it’s build based on u-blox Neo-M8N and is capable of receiving signals from GPS, GLONASS, Galileo, BeiDou, QZSS and SBAS. Plus integrated magnetometer module. Yesterday package…
-
Connecting ultrasonic rangefinder (Sonar) to INAV
Keeping constant altitude with a drone is not a trivial task. Specially, if drone is supposed to keep give altitude very precisely few meters above the ground. One of the reasons for it is difficulty of reading precise altitude. Barometer can drift when atmospheric pressure changes and can produce a lot of noise. GPS is…