Digital Inputs I13 and I14 with RasPi 3
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The P5 header is not connected to RasPi with the shipped UniPi to RasPi cable.
What ist the best way to use I13 and I14 with RasPi 3?- Is it possible open the 40 pin connector, insert 2 additional wires for GPIO 20 and 21 and close the connector again?
- Cut the 40pin connector in two pieces, throwing away the 14 unused pins. Connect P5 header with single wires.
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By the way: Is P01 internally connected with P02?
Thank you in advance!
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- is the way to do it. Two connectors do not fit on the pin header. However be careful when opening the connector not to break it.
Regarding the P01 and P02 - this depends on the confugiration of the JP 2-5 jumpers.
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I opened the connector and wired GPIO21 and GPIO20 to P5 header pin 5 and 6. I measured the connections of the modified cable. They are good. But the RasPi doesn't recognize the input.
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Is it necessary to wire the P5 ground?
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Both of them(Pin 7 and 8)?
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What to do with P5 header pin 1-4?
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Is P5 header pin 1 really located at the bottom left oft unipi (power source connector up)?
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JP 2-5 are all switched to the labels for external power source. Are they connected then?
Thanks a lot!
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I have updated the wiki a little bit: http://unipi.technology/wiki/Inputs_13,14
Please check the pin numbering.