[SOLVED] Variable Color LED v1.1 sample code for GrovePi+

prancy · November 20, 2021, 1:32am

I have the Grove Variable Color LED v1.1 and am trying to connect and have it work with my GrovePi+ but I was wondering if there was sample code for this or an API reference that anyone could lead me to.

I have the latest firmware and version of the GrovePi library. I’m running it on the latest Buster RaspiOS. I have confirmed that the ports on the GrovePi+ work with other sensors (Temp/Humidity and an ultrasonic sensor respectively) using the i2c port and the Digital Port (D7).

I’ve tried using the Chainable-RGB-LED code with 1 LED and also just the Blink LED code/samples but none work. I’ve also tried using the direct serial code with the RPISER port which also doesn’t work.

I’m wondering if there is an API or code out there for this LED that I couldn’t find or if I’ll have to buy the Chainable LED and use only 1.

EDIT: SOLVED!

I had to twist the potentiometers with a phillips head screw driver to turn the LED lights on since they were all in the closed position. (The 3 potentiometers for RGB are located next to the Grove port and look a little like screws).

It worked with the Blink and Fade samples from the GrovePi sample code.

cyclicalobsessive · November 20, 2021, 2:07am

python3 ~/Dexter/GrovePi/Software/Python/grove_led_blink.py

This looks like the correct sample to use for that device. Did you plug it into D4?

(or use grove_led_fade.py and plug it into D5)

The color cannot be changed programmatically - only by twisting the potentiometers on the board (gently).

Be sure to read the configuration information in the source files.

github.com

DexterInd/GrovePi/blob/master/Software/Python/grove_led_blink.py

#!/usr/bin/env python

# GrovePi LED blink Example for the Grove LED Socket (http://www.seeedstudio.com/wiki/Grove_-_LED_Socket_Kit)
#
# The GrovePi connects the Raspberry Pi and Grove sensors.  You can learn more about GrovePi here:  http://www.dexterindustries.com/GrovePi
#
# Have a question about this example?  Ask on the forums here:  http://forum.dexterindustries.com/c/grovepi
#
'''
## License

The MIT License (MIT)

GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
Copyright (C) 2017  Dexter Industries

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

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github.com

DexterInd/GrovePi/blob/master/Software/Python/grove_led_fade.py

#!/usr/bin/env python
#
# GrovePi Example for using the Grove LED for LED Fade effect (http://www.seeedstudio.com/wiki/Grove_-_LED_Socket_Kit)
#
# The GrovePi connects the Raspberry Pi and Grove sensors.  You can learn more about GrovePi here:  http://www.dexterindustries.com/GrovePi
#
# Have a question about this example?  Ask on the forums here:  http://forum.dexterindustries.com/c/grovepi
#

'''
## License

The MIT License (MIT)

GrovePi for the Raspberry Pi: an open source platform for connecting Grove Sensors to the Raspberry Pi.
Copyright (C) 2017  Dexter Industries

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights

This file has been truncated. show original

prancy · November 20, 2021, 2:33am

THAT WORKED! Thanks so much!!

I had to turn the potientiometers so that they were on haha, and then the blink and fade LED code worked properly.

I guess I should get the chainable LED’s if I want to change the LED colors programatically.