i-would-like-to-connect-1w-and-a-d-inputs-but-i-dont-find-any-pads-for-connecting-devices

 

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Questions and Answers › Category: Moitessier HAT › i-would-like-to-connect-1w-and-a-d-inputs-but-i-dont-find-any-pads-for-connecting-devices
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Wolfgang Klausing asked 6 years ago
4 Answers
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Thomas Staff answered 6 years ago

Hello Wolfgang,
you might solder a header on to your HAT. Then you could access up to 5 pins of the Raspberry Pi (GPIO16, GPIO19, GPIO20, GPIO21, GPIO26).
See chapter 5.1 and 5.2 in the user guide.
Regards,
Thomas

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Wolfgang Klausing answered 6 years ago

Hello Thomas   Unfortunately the Openplotter documentation is not very clear on 1W and SPI, but usually I would have to connect to MOSI MISO and SPICLK, that are not available. Would it be possible to use a breakout board to access the MOSI MISO and SPICLK together with GPIO07 ? May I configure any GPIO for 1W ? What about pypilot controller, I may use USB, but then I do not have optical isolation.   regards Wolfgang

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TorbjornLundahl answered 5 years ago

I have solder cables on the specified GPIO and also tested the connections. Though, I cannot get OpenPlotter to recognise the 1w termometer. Having followed the instructions to change the config.txt file and inserted 
dtoverlay=w1-gpio,gpiopin=x
at the end of the file
Any suggestion to get this to work? 

Sailoog replied 5 years ago

https://pinout.xyz/pinout/1_wire#

Sailoog replied 5 years ago

replace x by the pin you are using

TorbjornLundahl replied 5 years ago

This worked and I have the 1W temperatur sensor up running which I also can see on the sk diagnostics.

Now I want this external sensor presented on the Dash board AirTemp instead of the integrated sensor. Where do I configure this?

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Sailoog answered 5 years ago

What about using something like this?
https://www.amazon.com/Alchemy-Power-Pi-EzConnect-Raspberry-connector/dp/B01FE9EQ88
You will have access to pin 7 (reserved for 1W) and all the SPI pins. Remember that Moitessier HAT uses SPI_CE0_N/GPIO08/pin 24. You will be able to attach Moitessier HAT on top.

 

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