Trellis not detected
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pingpong1109
- Posts: 5
- Joined: Mon Mar 23, 2015 9:37 pm
Trellis not detected
I got myself a Trellis and connected it to my Pi using this tutorial https://learn.adafruit.com/trellis-pyth ... y/overview. I know I have i2c enabled because the RGB display works. Doing sudo i2cdetect -y 1 shows nothing in any of the addresses. Any help would be nice.
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adafruit_support_mike
- Posts: 67485
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Trellis not detected
Post a photo of your hardware and connections and we'll take a look.
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pingpong1109
- Posts: 5
- Joined: Mon Mar 23, 2015 9:37 pm
Re: Trellis not detected
Ah sorry, should have thought about that. Note: The purple wire is the INT and I believe doesn't need to be connected. Another Note: Image wouldn't attach properly so here is a link https://drive.google.com/file/d/0B3f3II ... sp=sharing
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adafruit_support_mike
- Posts: 67485
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Trellis not detected
The connections look okay..
Let's double-check the basics: check the voltage between the 5v and GND pads on the Trellis, then check continuity between the SDA/SCL pads and the connectors on the GPIO pins.
Let's double-check the basics: check the voltage between the 5v and GND pads on the Trellis, then check continuity between the SDA/SCL pads and the connectors on the GPIO pins.
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pingpong1109
- Posts: 5
- Joined: Mon Mar 23, 2015 9:37 pm
Re: Trellis not detected
It seems the 5v wire has allot of resistance on it. I am going to try a different wire and see if that fixes the issue. I will report back soon.
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pingpong1109
- Posts: 5
- Joined: Mon Mar 23, 2015 9:37 pm
Re: Trellis not detected
I am happy to report that fixed it. I am kinda embarrassed that I didn't think about that myself. I really appreciate your help :) Thank you!
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adafruit_support_mike
- Posts: 67485
- Joined: Thu Feb 11, 2010 2:51 pm
Re: Trellis not detected
Nah, debugging is a skill in its own right. It takes time and practice to pick up the moves.
The basic rule is "don't trust anything you haven't verified with a meter" followed closely by "when in doubt, use two meters and make sure they agree". ;-)
It's good to make a habit of testing things as you build.. when you solder a connection, check continuity between points on either side of it. Connect power temporarily (if it won't damage the partial circuit) and take some quick voltage readings to make sure things are where they need to be. Connect a battery and a 1k resistor to any LEDs to make sure they're in the right way around. 90% of all testing is pretty basic, and if you do it as you go it narrows the list of options when you discover a problem.
Glad to hear it's working for you though. Happy hacking!
The basic rule is "don't trust anything you haven't verified with a meter" followed closely by "when in doubt, use two meters and make sure they agree". ;-)
It's good to make a habit of testing things as you build.. when you solder a connection, check continuity between points on either side of it. Connect power temporarily (if it won't damage the partial circuit) and take some quick voltage readings to make sure things are where they need to be. Connect a battery and a 1k resistor to any LEDs to make sure they're in the right way around. 90% of all testing is pretty basic, and if you do it as you go it narrows the list of options when you discover a problem.
Glad to hear it's working for you though. Happy hacking!
Please be positive and constructive with your questions and comments.