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Build an ESP32CAM Robot Car

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Fritigern
(@fritigern)
Member
Joined: 3 years ago
Posts: 36
 

@dronebot-workshop, It took me weeks to solder and troubleshoot and get it working. I used the FTDi and a breadboard to program it, setting the FTDI output to 5V and feeding it to 5V  input on the ESP32-CAM.  

The camera re-orientation was sorted by deleting the reference to .rotate90 at the end of line 354 in app.httpd.cpp. (Deleting back from the final curly bracket to the previous one). This rights the video but reduces its height. Might be able to delete (or modify)  "-40px" from the max height definition elsewhere in that line if it refers to the video element size. I had to "modify" the design to make it work because there was so little electricity coming out of the pwm line from IO12 when the webpage slider was at 90% speed. I just connected both enable pins to 5v so it has one speed- "fast". I wrecked an ESP board soldering the external aerial jumper, but the range with the internal aerial is just enough for playing indoors. A fantastic little thing and a superb video and explanation. Thank you very much.

Fritigern


   
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Ron
 Ron
(@zander)
Father of a miniature Wookie
Joined: 4 years ago
Posts: 7195
 

@fritigern It sounds like you missed seeing Bill's corrective post at HERE

 

First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.


   
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(@videogame95)
Member
Joined: 3 years ago
Posts: 59
 

@jbo Hi I am just starting my esp32cam RC car, do you know the type of circuit board bill used in the video as they would make the project much tidier? I haven't even worked out the size I need but I think it may be about 4inch by 4inch as I need to cover the hole in the bottom of the truck3 I may put it in a plastic box to cover the hole and then put the circuit board inside, what size micro sd 16 32 64 will it take? 

I have the antenna to put on top of the truck.

 

Thank you for any help and suggestions.

 


   
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Ron
 Ron
(@zander)
Father of a miniature Wookie
Joined: 4 years ago
Posts: 7195
 

@videogame95 

Screenshot 2024 05 10 at 16.58.24

First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.


   
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(@davee)
Member
Joined: 3 years ago
Posts: 1728
 

Hi @videogame95,

   I don't know anything about this project, but I just looked at Bill (@dronebot-worksop)'s blog write up, and as he says, he used 'perf boads'

I am sure these are widely available from lots of places ... the first one that came up in my Google search was at:

https://www.aliexpress.com/item/1005001704555851.html

image

but this is just to give you a guide ... not a recommendation of a particular supplier.

It looks like Bill used two sizes, so you just need to ensure you get the size(s) you want. Then tend to sell in packs, such as in the advert I copied,  as the value of an individual one is too low.

Good luck if you go ahead with the pproject.

Best wishes, Dave


   
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Ron
 Ron
(@zander)
Father of a miniature Wookie
Joined: 4 years ago
Posts: 7195
 

@davee fyi @videogame95 Like Dave said, Bill used perf boards. You can buy collections of them on Amazon. Here are some pics of Bill using them. Here is an Amazon link Amazon

Screenshot 2024 05 10 at 17.31.16
Screenshot 2024 05 10 at 17.30.55

First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, and 360, fairly knowledge in PC plus numerous MPU's and MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.


   
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jBo
 jBo
(@jbo)
Member
Joined: 3 years ago
Posts: 102
 

@videogame95 - Howdy, thanks for the message. As @DaveE and @zander say, an assortment pack of perfboard should work fine, aliexpress or amazon. They are more experienced than myself, but I just made sure the boards were double-sided, and it worked out great.

As I recall, this project used two perf boards, a smaller skinny one for the ESP-32CAM, and a main one for everything else. The more I watched the video (a lot!), the more I appreciated the reasons Bill did it that way. It sticks the camera up a little more, above the carpet, and orients it in the correct direction, but my favorite was that having it detachable meant I could reprogram the ESP-32CAM easily and as often as needed. Something to consider, though it sounds like you're off to a good start on your truck project. 

Regarding micro SD cards, I don't remember using them on this project. The video was sent over WiFi, viewed on my phone for the all-important goal of not running into the piano, and that was it. If I did want to record some stills or video, I would start with one of the other projects, get it working, and see what size card works. Cheers, John

In theory, theory and practice are the same.
In practice, they're different.


   
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jBo
 jBo
(@jbo)
Member
Joined: 3 years ago
Posts: 102
 

@zander @videogame95 - Yes, as Ron notes, I'm AWOL recently, not posting, but looking in when I can. I've subscribed to this topic, so I see the updates. Good luck with your build!

In theory, theory and practice are the same.
In practice, they're different.


   
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(@videogame95)
Member
Joined: 3 years ago
Posts: 59
 

@davee Thanks for that I've started the build due moving  soon note much to build . Thanks so much


   
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