Introduction: Raspberry Pi Wifi Controlled Video Streaming Robot

Picture of Raspberry Pi Wifi Controlled Video Streaming Robot

Ever thought about building a cool robot with a camera on it ? Well, you came to the right place, I will show you step by step about how to build this robot.

With this you can go ghost hunting at night by controlling and seeing the video feed on your computer or drive it outside and just explore while sitting inside, it is very fun to drive.

Step 1: Materials Required

Picture of Materials Required

1. Raspberry Pi

2. USB WiFi Adapter (If you are using raspberry pi 2)

3. USB Webcam

4. SD Card with Raspbian installed

5. Power Bank

6. Robot Chassis with Motors (I used 300 rpm motors)

7. L293D IC or L298 Motor Driver

8. 9v Battery or a Battery Pack (If you are using a 9v battery then I would recommend to connect 2 in parallel)

9. A Switch

10. Breadboard or PCB if you prefer to solder

11. M/M and and M/F Jumper wires

Tools

1. Soldering Iron

2. Screwdriver

3. Double Sided Tape

Step 2: Assembling the Chassis

Picture of Assembling the Chassis

Solder wires onto the motors and mount the motors on the chassis. If you don't have a soldering iron then you can twist the wires and attach them with electrical tape but it is not recommended as it will be quite a weak joint. Then insert the wheels into motor shafts and screw them down.

Step 3: Preparing the Raspberry Pi

1. Install Raspbian on a SD Card and boot raspberry pi with a monitor, keyboard, mouse, wifi adapter and webcam connected.

2. From the raspi-config menu enable ssh

3. Go into the desktop and connect to your wifi network from the wifi option on the top right corner

4. Once connected check your Pi's ip address by typing ifconfig in the terminal

5. Open IDLE 2 from the programming tab from the taskbar and copy the code pi_robot and save it

6. To install the webcam I want you to watch this video made by Anand Nayyar

7. The other things I did was to change the resolution to 720p instead of 480p and search for "stream_maxrate" and change it to 3. To achieve a higher fps in streaming I also overclocked the Pi to 1ghz

TROUBLESHOOTING

When I tried to run the code in terminal with the command "cd Videos"(Because that's where I saved it) then "python pi_robot.py" it said syntax error so what I did was open the code in terminal with the command "sudo nano pi_robot.py" and erased the lines that already written in python and are not a part of the code and after that it worked. I don't know what was wrong so if anyone knows I would be happy to hear an explanation about this in the comments.

Step 4: Circuit

Picture of Circuit

The circuit is pretty simple and it gets even simpler if you use a L298 motor driver board. If you are using a L298 motor driver board then you just have to wire the gpio pins like in the second schematic.

Step 5: Mounting Everything on the Chassis

Picture of Mounting Everything on the Chassis

Well the pictures tell pretty much everything about how I have assembled it but of course yours will be different if you use a different chassis. I used double sided foam tape to mount everything on the chassis and try to use shorter wires so , it looks better.

Step 6: How to Operate It

Picture of How to Operate It

To start controlling your robot follow the following steps -

1. Switch on the Raspberry Pi but do not flip on the switch that connects the battery pack to the L293D yet

2. Connect to it through ssh using the program putty if you are on windows

3. Type in the command "sudo motion" and then open your internet browser and type in your Pi's IP address with 8081 at the end like "192.168.45.64:8081" and you should get the video feed. If it doesn't work then type 8080 instead of 8081

4. Now go back to the terminal and locate where you had saved your pi_robot.py file. I had saved it in the Videos folder, so the command is,"cd Videos" then "python pi_robot.py". Remember, everything is case sensitive

5. After that the program will start running. Now flip on the switch, now you should be able to control the robot from the arrow keys of your keyboard

6. Press the forward arrow and check if both the motors are moving in the right direction. If one of the motors is moving in the wrong direction then switch the two motor connections that connect to the L293D

Step 7: Controlling From a Phone

Picture of Controlling From a Phone

All the steps are the same, you just have download the app "JuiceSSH" from the play store. To control the robot you need arrow keys but a normal smartphone keyboard doesn't have arrow keys so we need to download an app Hacker's Keyboard'. Then connect to it like you did in windows.

Step 8: Some Pictures and Videos

The webcam video quality is descent but the fps is only 2 or 3. The video quality is good when outside but not when inside. It can drive on offroad terrain but not very well, it could if you use a higher voltage to drive the motors like with a small 12v battery.

If you liked the instructable it would be awesome if you voted for me in the contests :)

Comments

IgorF2 (author)2017-11-17

Great robot! :D

How long does it run on the 9V batteries?

I've made one using an Arduino and an old smartphone. I my case I use a power bank as the power source.

https://www.instructables.com/id/WiDC-Wi-Fi-Contro...

Arduino Tech (author)IgorF22017-11-19

it runs for maybe 2 hours maybe

IgorF2 (author)Arduino Tech2017-11-19

Thanks for the information! :)

Sayandeep Nayak (author)2017-11-15

Cool project.

Thanks

Do you have the ams 1117 module?

If you do, please bring it tomorrow.

Ghloo (author)2017-11-14

Nice, I am planning something very similar. I would only like to have the controls withing the (RasPi-hosted) webpage along with the cam stream. Two sliders (-100 to +100) for the two motors plus some buttons to fire onboard LEDs. Hell, I could even mount a all boombox speaker and let the car talk thru espeak. ;)

That being said, how do I put the php + jquery + python together? ;D

Arduino Tech (author)Ghloo2017-11-15

Sounds amazing but I can't help you since I have no experience in jquery and php

Ghloo (author)Arduino Tech2017-11-15

Well, I will either tinker it myself or order a custom script for a couple of bucks at Fiverr. Until then ssh and keyboard will have to suffice.

One last note on this: I have a small (Measy?) BT for the Pi ... and likewise a (wireless) nunchuck controller or gamepad is de facto a keyboard (and obviously, you could also read accelerometer inputs from a control gauntlet. ;). I think it would be awesome to choose whether I am on a spy mission (thus with cam stream, keyboard and flat screen) or in combat (using a more convenient controller).

About This Instructable

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Bio: I love Arduino and Raspberry pi and High Voltage... i build robots and also other cool stuff so stay tuned !!
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