What kind of hardware?

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mrwee
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What kind of hardware?

#1 Post by mrwee » 24 Sep 2020, 21:15

Hi,

I'm looking for some hardware where I can connect a probe to "any" serial connection where I can view the data being sent, on my PC. Right now I'm looking inside a tower fan, which has two PCB's with a connector between. The connector has e.g. RX/TX, so I was thinking if I somehow could tap into the communication and perhaps replicate it via en ESP + misc. hardware. Does such hardware exist? (Not only for e.g. RS-232).

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Re: What kind of hardware?

#2 Post by TD-er » 24 Sep 2020, 23:03

Well such protocol decoders do exist and often use a PC to decode the data.
For example Sigrok

For this you can use just about any logic analyser tool, like the very affordable 8 channel 24 MHz USB analyzers which can be had for less than 10 euro.
For example: https://www.banggood.com/nl/USB-Logic-A ... 77821.html
But there are lots and lots of sellers of these.

Only disadvantage is that you need to hook it to a PC.

chemmex
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Re: What kind of hardware?

#3 Post by chemmex » 26 Sep 2020, 08:50

Only disadvantage is that you need to hook it to a PC.
Sigrok also has Android port, so it can be used with a phone via OTG

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Re: What kind of hardware?

#4 Post by TD-er » 26 Sep 2020, 13:51

OK, didn't know that.
Now find a phone supporting USB OTG :)

mrwee
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Re: What kind of hardware?

#5 Post by mrwee » 27 Sep 2020, 20:37

Don't mind a PC, I'll try the one @TD-er is linking to. For that price, I can afford possible mistakes :D

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Re: What kind of hardware?

#6 Post by TD-er » 27 Sep 2020, 22:14

Just keep in mind the GND of the analyzer is connected to the GND of your PC.
So make sure you don't try to connect it to something with a completely different potential.

mrwee
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Re: What kind of hardware?

#7 Post by mrwee » 29 Sep 2020, 10:34

TD-er wrote: 27 Sep 2020, 22:14 Just keep in mind the GND of the analyzer is connected to the GND of your PC.
So make sure you don't try to connect it to something with a completely different potential.
Yes, that's a classic mistake. Looking forward to testing when the box arrives. Thanks for your input, so far :)

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