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UART signals polarity is inverted #2

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vmarzlin opened this issue Dec 4, 2020 · 1 comment
Open

UART signals polarity is inverted #2

vmarzlin opened this issue Dec 4, 2020 · 1 comment
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critical This issue must be fixed ASAP no-issue-activity schematic Issue on schematic

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vmarzlin commented Dec 4, 2020

When idle, RX and TX should be high level as we can see on the diagram below:
UART Frame
Source of the image: AmenophisIII, CC0, via Wikimedia Commons

The communication is not working with this issue as we can see on this capture (took on the output of an Arduino trying to communicate with this module):
Trying to read version
@vmarzlin vmarzlin added the schematic Issue on schematic label Dec 4, 2020
@vmarzlin vmarzlin self-assigned this Dec 4, 2020
@vmarzlin vmarzlin added the critical This issue must be fixed ASAP label Jan 15, 2021
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critical This issue must be fixed ASAP no-issue-activity schematic Issue on schematic
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