Exp. board 3.0: Where is documentation for jumpers? I cannot find it
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Hi,
Exp. board 3.0 has 7 jumpers. What are they for? I cannot find any documentation for them.
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@andrejpekarcik It seem to be the same as Exp. Board 2 https://docs.pycom.io/chapter/datasheets/boards/expansion2.html
and https://docs.pycom.io/chapter/datasheets/downloads/expansion3-specsheet.pdf
They connect certain signals/devices of the exp. board to the Pycom module. -
Hi @andrejpekarcik,
You can find the pinout sheet for the Expansion Board 3 here.
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@dan This link seems misleading in two aspects:
a) the question which was raised (jumpers?) is not answered
b) the GPIO numbers in the link do not match any of the new Pycom boards. They seem to match WiPy1 -
@andrejpekarcik The jumpers are same as in the ExpBoard2, in its pinout (that @robert-hh linked) you can see what they do (bottom left section).
@robert-hh what do you mean they don't match the boards? the
GPIOpins match the pins on the Expansion Board -
@dan Sure, but which GPIO's are these? Or do say that these names match the GPIO pin names, which at some time in the past were GPIO's of a certain CPU?
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@robert-hh Correction: there are some issues with the pinout sheet, the pin labels have been mixed up. We'll update it with the correct labels.
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@dan Thanks a lot. Function of jumpers should be explained also in Exp. board 3.0 docs with more details. I do not understand what it means to "Enable TX/RX/CST/.. signal".
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@andrejpekarcik That's kind of obvious. There is am USB/UART bridge on the expansion bord, which coverts USB messages into a serial data stream, and RX, TX, CTS and RTS are data and cotrol signals of this stream. The jumpers are in the wire connecting the USB/UART bridge to the xxPy device socket.
RX receive data
TX transmit data
RTS request to send
CTS clear to sendRX and TX are mandatory, RTS and CTS are optional.
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This post is deleted! -
@dan link to exp board brocken
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@prx You can still find it on the pages for Expansion board 2 https://docs.pycom.io/datasheets/boards/expansion2 and you can see it on the pictures for the Exp Board 3 Pin-Out, which show what is printed on the board.
https://firebasestorage.googleapis.com/v0/b/gitbook-28427.appspot.com/o/assets%2F-LIL0iGdl11z7Jos_jpX%2F-LKN7scqKKkb6TqB3uYO%2F-LKN82UNLD-yPfdRcqkf%2Fexpansion3-pinout.pdf?generation=1534782103416626&alt=media -
@andrejpekarcik we are working on an updated version, I'll add it to my list and see what we can do. Thanks for the feedback!
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