thanks again
i will get this
that combo is 258 dollars 
https://www.maxbotix.com/Ultrasonic_Sensors/MB1240.htm i will get this instead since it is supported.
that will do fine right?
updated list of all HW:
PixHawk4 Low cost autopliot controller
Odroid ux4 with power supply: low cost companion pc
3G huawei modem stick: Low cost 3G link
Rc boat: low cost rc boat
Rc 9 ch transmitter/receiver kit: Kit
Sonar sensor: low cost compatible sonar
Camera:low cost camera for opencv
Low-cost Gimball: 2 axis low cost gimball for image stabilization
GPS/COMPASS module: GPS COMPASS
batteries:lipo low cost 5k mah batt
power module: low cost power module
hdmi cable micro d for odroid type d hdmi
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The list looks ok to me. I can’t really comment on the odroid too much. I’ve used them and they’re on the list of supported companion computers but we don’t have an APSync image for them so you’ll have to do the setup largely on your own… or maybe use Maverick instead of APsync.
I’m not a fan of the sonar really… all the lidar work better even the low-cost benewake tfmini sonar.
Thanks again. I thought lidar would be too hard. Now after your precious recommendation I switch to Lidar.
Companion pc will not interfere with the boat’a mission a lot. But i was thinking if i had Ubuntu 16.04 on odroid while connected to pixhawk 4 via usb, and mission planner works on the Ubuntu if I’m not wrong tho, could it re plan it like a pc? Because i will run a program like TeamViewer incase of Manuel re planing. But mainly goal is to read gps data, use opencv applications for object detection. When detected an object sending a message via internet along with gps coordinates. So i need lots of computing power.
One big issue is the heat. I’m seriously thinking about the water proofing in plastic tapper wares. I’m afraid to cause unwanted electromagnetic field to mess up with RC and gps etc… But i am not sure about how well odroid xu4 will perform in a fully closed air and water tight box.
I also leaned the brushed dc motors get pretty hot. I’m ordering some small round heatsinks that won’t enclose the breathing holes.
Will using a 2.5mm thick copper heat pipe(ish) cause serious interference problems?
Would it make more sense to deploy the pc at the top back of the boat for better cooling and less interference?
I really appreciate your whole help and efforts. This is a great community. This will be my final graduation project.
I will invest endless hours in it
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Re controlling the vehicle from the companion computer, we have some instructions for Copter here. The commands work for Rover as well though.
I wouldn’t worry too much about overheating. I suspect keeping the components dry will be a bigger issue. I use boxco boxes on my boogie board boat.
One thing you might need to be careful about is keeping the odroid away from the GPS because it definitely interferes with the GPS signal. RPI3s produce less interference I think but don’t have as much CPU power.
I’m ordering my parts. For the odroid what kind of tape i should use inside the casing? I will buy this casing for water proofing and EMI proofing
case water proof
but i think i need to shield the interior
Hello I’m ordering the parts yet I had an issue with the procurement of the Century boat.
Is this one suitable?
https://www.hepsiburada.com/double-horse-7006-uzaktan-kumandali-surat-teknesi-p-OYUNREEL7006
much expensive with brushed motors maybe there is a better option that is big?
Okay this is almost 1 meter. much better imho. will replace battery with 5000mah 3s xt 60 lipo.
I bought this one. Hopefully it is 1 meter. much better for deploying companion pc, sensors etc and camera.
And since i will use this on open waters it will get less effected by waves.
price is 100 usd
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I just ordered 3dr Telemetry 433mhz in order to control the missions from Ground Control(laptop)
Odroid will only use the gps data from pixhawk and will do it’s own mission via 3G modem.
Can you refer me to documentation or tutorial on how to connect the (motors are brushed)ESC to the autopilot system. boat is 7006 by Double Horse, and acquired as everything else.
I think this will be a separate steering and throttle boat (aka Ackermann steering) so the steering/rudder servo will be connected to the flight controller’s MAIN OUT 1 and the motor ESC will be connected to MAIN OUT 3. It’s written on the wiki though… so…
Thanks. The 7006 lacks rudder and motors are fixed. Will i be making a rudder? (I thought it would be running on skid steering) Thanks for the reply. And is there any detailed export on esc wiring. Thanks
Ah, ok. Skid steering should also work. The setup is on that same page linked above. there’s no more specific wiring setup instructions I think.
Thank you. I hope I will figure out esc part. I get everything about pix hawk very detailed explanations. My esc is not fancy and stock lets see. I’m waiting for the xt60 power module to arrive.
Do i have to buy the BEC? Thanks for the support
I don’t think a BEC will be required if the flight controller came with a power module (which it probably did)
This is the set. Plus xt60 generic power module. Thanks. Will 4s 25c 5000mah lipo do fine? I really don’t have any spec sheet for the motors, all i know they are 540 and brushed. Also some pwm cables are short, is there are a safe way to extend them?
Is it possible to use pix hawk in a waterproof casing? Thanks again
The ESC/motor/battery included in that boat kit appears to be a regular RC car battery which is normally 7.2 volts (aka 2S). I suspect it won’t be happy with a 4S battery.
It is 650 grams very heavy 20cm NiCd says 12V 1900MaH on it. It is really heavy. Should I connect it to the amp/volt meter? Product says 25 miles per hour. How can I be precise? It is in xt60 form. Or should i connect the motor while working to an amp/volt meter?
Hello. Stock battery is 12V nicd.
Here is my esc: https://i.hizliresim.com/grpm2Z.jpg
https://i.hizliresim.com/7adR7P.jpg
I really don’t think I can connect pix hawk to my stock ESC no PWM connection I think i’ll be stock on my battery.
I’ll test my motors voltage soon. Should i just 1 this for 2 motors. good price imho. supports lipo nicd nimh
https://www.promodelhobby.com/urun/fircali-80a-320a-rc-esc-7-2v-16v-fanli-2s-4s
12V is a 3S battery which is a very common voltage.
I’m unable to open the pictures of the ESCs…