IR-LOCK not working in copter 3.53

ArduCopter Copter 3.5
1

I am connected to i2c on pixhawk as per instrctions plnd parameteres are all set.
The error I get is “Bad vision position”.I downloaded a data flash log and it read
heal=0,tacq=0.It si not communicating with the pixhawk.Is there something missing in
my settings.Also,Do I need sonar or lidar to make this work?

2

Which pixhawk are you using? Ph1 or the cube? If it’s the cube, make sure you configured the interal I2C bus.
Yes, you need a rangefinder attached in order to get Precision Landing enabled.

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3

I’m using PH1. But, I dont have rangefinder installed.Can I use Maxbotic 1240 or do I need something exotic
to make this work.Also,Should I use internal I2C?Is this why I’M getting bad vision position error?

4

Precision landing with IRLock only works if you have a rangefinder connected (laser or sonar).
Moreover the I2C port can be changed in the PLND_BUS param but you shouldn’t have to change it normally.

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5

Technically, any rangefinder/sonar will enable the precision landing to function. However, we recommend the SF20/LW20 units, due to their accuracy and robustness against IR interference.

Best,
Thomas

6

Thanks ThomasSFL.
I appreciate your response.I will look into aquiring a SF-20 in the very near future.

7

Thanks for the input.I’m looking into getting a rangefinder.

8

Whoops sorry for digging up an Old Thread.
Anyone tried the SW11/C connected to the I2C Bus with IR-Lock?

I am currently occupying all my serial ports with none-left to spare.
The SW11/C is due to arrive in a couple of days, just wondering if any has any experience with the I2C Setup!

Thanks everyone!