44 "Wanli" Raspberry Pi car - PicoW remote control car (video display)

lb8820265

44 "Wanli" Raspberry Pi car - PicoW remote control car (video display) [Copy link]

 

 

Video first

The video introduces a remote control car made with PicoW. You can control the movement of the car with a mobile phone, and also send back some information such as speed. The whole program is written in C language.

I have used Raspberry Pi to make a remote control car before, see the post "Wanli" Raspberry Pi car - the first stage of the demonstration , the car uses the Nam wheel, the actual experience is not very good, so this time it is replaced with a differential wheel, the structure is similar to the sweeping robot. Previously, the Raspberry Pi was used as the control motherboard, and the operating system was non-real-time, which was not conducive to control and encoder data reading, for example: "Wanli" Raspberry Pi car - motor control learning (4-wheel speed control) .

Therefore, using a single Raspberry Pi in a system that requires strong real-time performance is not enough. There must be a control baseboard. The baseboard is responsible for the real-time part, and the Raspberry Pi is responsible for sending operation instructions. At present, most common baseboards on the market use STM32 as the main control chip, but when I first learned about PicoW, I was shocked. This small board not only has rich peripherals and high main frequency, but also supports WiFi and Bluetooth. And it is also very cheap. This will definitely become a new favorite in the DIY world! If PicoW is used as a control baseboard, it can not only be used to control the car alone, but also can be connected to the Raspberry Pi to achieve more complex functions. It is perfect.

It is said that PicoW is easy to use, but this is only for users who use Python. If you use C language, it will be much more difficult and there is less information. However, C language has better real-time performance and can use more peripherals. Therefore, it must be developed in C language.

I will first show the demonstration video, and later I will share the production process, which includes: environment construction, routine running, new project, online debugging, peripheral learning, hardware construction, control logic, etc. Later, PicoW will be used as the control baseboard, and Raspberry Pi will be added to achieve more functions. Welcome to continue to pay attention.

火辣西米秀

I'm a little excited and looking forward to the post owner sharing the production process later.

damiaa

After the optimization, the OP has reduced the cost and can now sell the product.

极限零

Would it be cheaper to use ESP32? Considering the battery life, it is better to use Bluetooth connection.

damiaa

Extreme Zero published on 2023-10-16 09:17 Would it be cheaper to switch to ESP32? Considering the battery life, it is better to use Bluetooth connection.

If distance is taken into consideration, sub 1g is probably better. It is estimated that a single-chip domestic chip will be needed to reduce the cost.

wangerxian

The author [Wanli] has not updated this project for a long time. Are you not busy recently?

lb8820265

damiaa posted on 2023-10-16 09:08 After the optimization, the cost has been reduced and it can be sold.

Haha, there’s no point in selling this, there are too many of these things on the market, and the process of learning how to make them is more interesting.

lb8820265

wangerxian posted on 2023-10-16 17:53 OP [Wanli] This project has not been updated for a long time. Are you not busy recently?

Well, I was lazy in the past period of time, I have to work harder next time

lb8820265

Extreme Zero published on 2023-10-16 09:17 Would it be cheaper to switch to ESP32? Considering the battery life, it is better to use Bluetooth connection

Yes, ESP32 is also a very powerful hardware product, but I haven't learned about it in detail. However, WiFi has an advantage that it can be connected to a router. In the future, if the whole house is routed and the car is connected to WiFi, you can control the car from anywhere.

lb8820265

Hot Ximi Show published on 2023-10-16 07:29 I am a little excited and look forward to the sharing of the production process by the host later,,,

Haha, thank you!

wangerxian

lb8820265 posted on 2023-10-16 18:06 Well, ESP32 is also a very powerful hardware product, but I haven't learned about it in detail. However, WiFi has an advantage that it can be connected to a router. In the future, my home...

Yes, I had this idea before, to control the car from the outside and then install a camera on it.

lugl4313820

I'm curious about what the front wheels are like. Will there be particularly great resistance when turning?

lkh747566933

I'm curious about what the front wheels are like. Will there be particularly great resistance when turning?

lkh747566933

lugl4313820 posted on 2023-10-17 10:11 I am curious about what the front wheels are like. When turning, will there be particularly great resistance?

It looks like a Mecanum wheel, but not quite. A Mecanum wheel cannot move completely sideways, it needs friction with the ground.

lugl4313820

lkh747566933 posted on 2023-10-17 17:23 It looks like a Mecanum wheel, but not completely. A Mecanum wheel cannot move completely sideways and needs friction with the ground

The original poster could spread some knowledge, where can I buy this kit, I'd like to get one to play with.

lb8820265

lkh747566933 posted on 2023-10-17 17:22 I am curious about what the front wheels are like. When turning, will there be particularly great resistance?

This wheel is amazing, it turns so easily

lb8820265

lugl4313820 posted on 2023-10-17 18:08 The OP can spread some knowledge. Where can I buy this kit? I'll get one to play with.

This shelf was bought on Taobao, from a store called Lunqu Technology

lugl4313820

lb8820265 posted on 2023-10-17 22:16 This shelf was bought on Taobao, a store called Lunqu Technology

The price is not cheap. The OP must have spent a lot of money to play with this little car.

lb8820265

lugl4313820 posted on 2023-10-18 07:32 The price is not cheap. The original poster must have spent a lot of money to play with this little car.

Well, it is indeed not cheap, and the production process is also a process of trial and error. There are all kinds of parts piled up in the house.

lugl4313820

lb8820265 posted on 2023-10-18 09:52 Yes, it is indeed not cheap, and the production process is also a process of trial and error. All kinds of parts at home are piled up into a mountain

I went to his store and looked around, but I couldn't find the model you have. Could you give me a link?