Hello. I’m new to the forum. I purchased a scroll bot kit and am not having any luck getting pixels to light up. Soldering of the headers appears to be solid. The scrollphathd sw installed correctly using: curl https://get.pimoroni.com/scrollphathd | bash except for errors installing the smbus …

I received the new ScrollpHatHD, soldered the connector and it seems to be working just fine. Either my soldering messed up the 1st one or it had a problem from the factory. alphanumeric, your soldering tips and other help are much appreciated.

Just for verification you ran import scrollhathd and scrollphathd.set_pixel(1, 1, 1) and scrollphathd.show()

Your the second person to report a smbus error? Same error in python, different hardware though? [image] Bme680 smbus Support Thanks, if no one else has a fix, I guess I’ll try burning another chip and not upgrading Python3 to see if SMBUS works that way.

Yes, exactly. There was no error returned but the led did not light.

Can you post good close up pictures of your soldering, pHat and Pi Zero Please? Does i2c detect show the correct value, 0x74?

[IMG_9799%20(1)] [IMG_9803%20(1)] Results of sudo i2cdetect -y 1 [IMG_9805]

Your soldering isn’t the best, I have seen worse though. The Scroll pHat looks pretty good, the Pi Zero IMHO, is a bit iffy soldering wise. Make sure no two GPIO are shorted together with a solder bridge. Especially the pins used by the scroll phat HD. [image] Scroll pHAT HD at Raspberry …

Might be a good idea to run i2c detect, with and without the scrollphat hd attached. That might clue you in to where the glitch is, and where to look.

alphanumeric - thanks for helping me with this problem. Have not had much time to work on this because of the holidays. I did reflow the solder joints on the pi and hopefully it is a better job. Where I stand now is the pHat is not being detected. Running i2cdetect -y 1 shows only dashes in the …

Ok, redoing the soldering on the Pi (while it may not seem so) appears to have maybe helped things. i2c detect should show just dashes with nothing connected to the Pi. It should be blank. With the Scroll pHat HD attached though, you should see a one lone 74. Your not seeing that so something is st…

Good suggestions. I do not have another hat, but did try the scrollphathd on a different PI. I2cdetect did not find the scrollphathd so I am guessing it is the problem.

Scrollphathd not working

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alphanumeric December 22, 2018, 6:12pm 3

Your the second person to report a smbus error? Same error in python, different hardware though?

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Scrollphathd not working

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