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Display - Pre-Assembled - Metro M4 - CircuitPython
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Display - Pre-Assembled - Metro M4 - CircuitPython

by bear_tactics on Tue Sep 15, 2020 7:37 am

Good morning,

I am looking for a pre-assembled display that has pin-outs or a terminal block, so I can just wire it up to my Metro M4.

I do not want to have to solder myself. I found this display on a different site:

https://www.buydisplay.com/i2c-blue-1-5 ... spberry-pi

But I am not sure I can use it with the Metro M4. Can someone please advise?

Thank you.

bear_tactics
 
Posts: 27
Joined: Mon Jul 20, 2020 8:22 am

Re: Display - Pre-Assembled - Metro M4 - CircuitPython

by dastels on Tue Sep 15, 2020 9:34 am

The shop has a variety of shields that can be mounted directly on the metro. TFTs:
https://www.adafruit.com/product/1947
https://www.adafruit.com/product/1651
https://www.adafruit.com/product/802

as well as eInk:
https://www.adafruit.com/product/4229

If you want to use CircuitPython, I suggest you stick with an Adafruit product that has CircuitPython support. Check the associated tutorial guides (linked from those product pages) for information on if/how to use the above shields with CircuitPython.

Dave

dastels
 
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Joined: Tue Oct 20, 2015 3:22 pm

Re: Display - Pre-Assembled - Metro M4 - CircuitPython

by bear_tactics on Tue Sep 15, 2020 3:14 pm

These are great solutions, and I love how they mount. My only issue is I also need to tie in a sensor to the SCL/SDA, 5V and GND pins. Is there some sort of header that can be installed in between the display and the board to allow additional wiring.

Or is soldering the only way to get around this?

bear_tactics
 
Posts: 27
Joined: Mon Jul 20, 2020 8:22 am

Re: Display - Pre-Assembled - Metro M4 - CircuitPython

by dastels on Tue Sep 15, 2020 4:36 pm

I suspect you will end up soldering one way or another. I see two ways to get at the I2C and power connections:
- solder onto the appropriate pins, probably on the bottom of the Metro board.
- use a protoshield (https://www.adafruit.com/product/2077) and get those connection from it. That's a better approach than soldering to the Metro, and you can put circuitry onto the prototyping parts of the shield.
- use a proto-screw-shield (https://www.adafruit.com/product/196). It's wider than the Metro, but the screw terminals would let you connect I2C/power without soldering which makes things more modular and no soldering is required once the shield is built.

In both of the protoshield cases, the stacking headers would let you put the three boards together: the protoshield goes onto the Metro, and the display goes onto the protoshield. It makes for a thicker "sandwich" but avoids soldering directly to the Metro or display board.

Dave

dastels
 
Posts: 3410
Joined: Tue Oct 20, 2015 3:22 pm

Please be positive and constructive with your questions and comments.