First experiments: OpenMV with SPIKE Prime
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- Опубликовано: 6 мар 2021
- I connected an OpenMV camera to a LEGO SPIKE Prime hub to make it follow my face around the room. Both run Micropython code and they communicate over UART. Then I proceeded to use the i2c capabilities to connect a non-LEGO sensor. The LEGO hubs do not natively support I2C so I used OpenMV as a bridge.
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Cool stuff, keep up the great work
Thanks, will do!
Cool! Mindblowing! Keep it up!
Thanks a lot!
I have an OpenMV which I’ve never used, so looking forward to your full tutorial. I just finished a more primitive way of connecting a camera to a Spike Prime which I intend to use for object finding and following. I use a Pixy camera connected to a microView Arduino along with a tiny DAC board from Adafruit to convert the centroid data from the camera to a varying voltage. This voltage drives an LED which varies in brightness with the change in voltage. Finally, I point a Spike color sensor at the LED which produces corresponding values which can be used by a Python PID program to control the motors for object following. It’s a bit of a kluge, but it works, and, like your time of flight sensor, I can plug any sensor I want (analog, digital or I2C) into the microView and get its data into the Spike hub.
I am working on an uart protocol to make this easy and generic. Subscribe to be notified. I will also publish on my blog. Now I'm working hard to get new supplies of this board.
@@AntonsMindstorms Looking forward to the boards and the code
@@AntonsMindstorms I'm eager to buy the interface board, so wondering if you've made any progress on the easy to use uart protocol.
The protocol works fine now. You can read all about it here: github.com/antonvh/LMS-uart-esp/tree/main/Libraries/UartRemote This weekend I'll update the H7 project with the latest version of the library.
Awesome demo. I am looking forward to the instructions on how to replicate it
Coming soon! When I find the time, they will appear on github, here: github.com/antonvh/LMS-uart-esp
I was also able to connect pixycam v2 using I2C class in umachine module in Robot Inventor firmware (unfortunately I could not find umachine class in Spike Prime firmware). I am also experimenting now with M5Stack StickV over UART using Lego ultrasonic sensor block and exact distance values.There is also HuskyLens from DFRobot that is easier to program than M5StickV which can also be programmed using MicroPython.
Nice. Where can I find more about that 2C class?
I was able to connect HiTechnic Color Sensor with Spike Prime. This sensor communicates over I2C and works with 3.3V. I connected blue wire (SDA) to pin 6, yellow (SCL) to pin 5, green (VCC) to pin 4 and red (GND) to pin 3. You can also split the cable to add multiple sensors on one Spike Prime port (if you can change the sensor's I2C address). Here is my code below.
from umachine import I2C,Pin
from hub import port
port.C.mode(port.MODE_GPIO)
i2c=I2C(scl=Pin.cpu.D11,sda=Pin.cpu.E4)
print(i2c.readfrom_mem(1,0,24))
c=i2c.readfrom_mem(1,66,4)
print("color=",c[0]," red=",c[1]," green=",c[2]," blue=",c[3])
It doesn't work for me (ENODEV). Where did you find the cpu pin numbers?
Look up the Facebook post by Gianluca in august
@@ikarib I found gianluca's github repo with the pin numbers, thanks. That is great. I also discovered that he has deceased last December due to Covid. That is really sad, a big loss.
Very cool, I'd like to order few, but can not find the product on your page, any place to find it? Thank you!
It is here: www.antonsmindstorms.com/product/spike-smart-camera-breakout-board-spike-openmv/
Do you sell the board ? cant seem to find in your website
Can I use mindstorms hub to control Technic+ hubs (ideally over bluetooth) ?
Yes, you can. Well, in theory. All of the hubs you mention have BLE chips. And you can access that in Python. No one has built handy framework for this yet. (That I know) So it will be hacking and pioneering at this stage.
what ide did you use?
Is it possible to use scratch codes to do that?
I don't think so
do you know of a third party manufacturer that sells sensors for the new mindstorm 51515?
No but with my breakout board, you can connect any cheap i2c or uart sensor you find in chinese webshops. I exepct new stock today. antonsmindstorms.com/product/spike-ri-wifi-i2c-board/
@@AntonsMindstorms Hey there! On your website it says "Page not found". Do you still sell those boards?
@@leoarndt2849 They are out of stock. I have one very last one lying around. Email me or message me on facebook/insta if you want it!
Nice! Do you know if it is possible to connect to the Hub (51515) from OpenMV and use the REPL directly?
Yes you can, why?
@@AntonsMindstorms just exploring the possibilities of the 51515 set before purchase, already ordered the OpenMV based on your vid, combined with a Gelo build this could be very interesting.
i want to buy, breakout board, but i cant. Can you shipping to capital of Kazakhstan - Astana?
I added Kazakhstan as a destination. Thanks for asking.
Thank you 😊@@AntonsMindstorms
I bought from your website, I received a message in the mail, but there is no information about the order on your website. My order is number 8613
@@Erlan004 It's best to reply to that message you received, then I can track and send you an update.
Do you ship worldwide? :D
Currently us, eu and Brazil. In what country do you live?
@@AntonsMindstorms Russia
I added Russia to my website now. I'm also investigating cheaper methods to ship internationally.
HELP ME !!
[Errno 19] ENODEV While writing pyhuskylens.mpy[Errno 19] ENODEV While opening file for hash check.Traceback (most recent call last): File "install_mpy_robot_tools", line 67, in NameError: name 'hash_check' isn't defined ??????
[Errno 19] ENODEV While writing pyhuskylens.mpy[Errno 19] ENODEV While opening file for hash check.Traceback (most recent call last): File "install_mpy_robot_tools", line 67, in NameError: name 'hash_check' isn't defined !!!!
It only works on Robot Inventor firmware