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Author Topic: USB cable from Pi zero W to CM15A question  (Read 1111 times)

soxfan1966

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USB cable from Pi zero W to CM15A question
« on: January 18, 2020, 10:14:43 AM »

My current cable is about 6 feet long.  When I set things up a ear ago I had it in a different location so wanted a longer cable.  Now I only need about a foot.  But I can't recall the specifics on what I need for the connections - is it a USB A to B like this one?

Cable Matters USB 3.0 Cable (USB 3 Cable, USB 3.0 A to B Cable) in Black 3 Feet https://www.amazon.com/dp/B00C7RUWCU/ref=cm_sw_r_em_apa_i_DcYiEb2YW62J3
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LostDog88

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Re: USB cable from Pi zero W to CM15A question
« Reply #1 on: January 18, 2020, 10:39:29 AM »

My current cable is about 6 feet long.  When I set things up a ear ago I had it in a different location so wanted a longer cable.  Now I only need about a foot.  But I can't recall the specifics on what I need for the connections - is it a USB A to B like this one?

Cable Matters USB 3.0 Cable (USB 3 Cable, USB 3.0 A to B Cable) in Black 3 Feet https://www.amazon.com/dp/B00C7RUWCU/ref=cm_sw_r_em_apa_i_DcYiEb2YW62J3

Ummm...Not to be a cheeky one but didn't you look at the connection on the device? LOL.

Anyways. This is what you want.

https://www.amazon.com/AmazonBasics-Printer-Type-Cable-Male/dp/B00BCWALHM/ref=asc_df_B00BCWALHM/?tag=hyprod-20&linkCode=df0&hvadid=167126093426&hvpos=1o1&hvnetw=g&hvrand=9103881263519070781&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9033471&hvtargid=pla-83922868406&psc=1

Enjoy!
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soxfan1966

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Re: USB cable from Pi zero W to CM15A question
« Reply #2 on: January 18, 2020, 10:45:33 AM »

Thanks.  The one you linked was 16feet, but using the description:
USB 2.0 A-Male to B-Male Cable

I found one that's 1.5 feet so going with that.

Thanks again
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Brian H

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Re: USB cable from Pi zero W to CM15A question
« Reply #3 on: January 18, 2020, 11:28:07 AM »

From the Pi Zero information sheets.
The Pi Zero uses a Micro AB for OTG USB connector. Not a standard A to B cable.
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soxfan1966

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Re: USB cable from Pi zero W to CM15A question
« Reply #4 on: January 18, 2020, 11:30:01 AM »

Ok. I will need to do another search on Amazon for one with a micro connection.  Thanks for clarifying.
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brobin

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Re: USB cable from Pi zero W to CM15A question
« Reply #5 on: January 18, 2020, 11:34:09 AM »

My current cable is about 6 feet long.  When I set things up a ear ago I had it in a different location so wanted a longer cable.  Now I only need about a foot.  But I can't recall the specifics on what I need for the connections - is it a USB A to B like this one?

Cable Matters USB 3.0 Cable (USB 3 Cable, USB 3.0 A to B Cable) in Black 3 Feet https://www.amazon.com/dp/B00C7RUWCU/ref=cm_sw_r_em_apa_i_DcYiEb2YW62J3

I used one like this - available in various lengths and straight, left or right angle. No OTG adapter required.
https://amzn.to/2RsKKwq
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Brian H

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Re: USB cable from Pi zero W to CM15A question
« Reply #6 on: January 18, 2020, 11:36:47 AM »

brobin,
That one looks like the one I was using. Micro USB to USB B.
I didn't remember where I got it but you jogged my memory.
« Last Edit: January 18, 2020, 11:39:44 AM by Brian H »
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Tuicemen

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Re: USB cable from Pi zero W to CM15A question
« Reply #7 on: January 18, 2020, 11:58:57 AM »

That's simular to what I originally had just not a micro end so I needed a adaptor.
For my PI Inside Cm15 I just soldered the Cm15 connections to the Pi test pads. (no external wire hanging off the USB port)
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soxfan1966

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Re: USB cable from Pi zero W to CM15A question
« Reply #8 on: January 18, 2020, 12:12:02 PM »

Follow up question: Aside from the longer cable I have now just lying on the floor and getting in the way, would their be a response time improvement with a shorter cable - say 1.5 feet vs 6 feet?
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Tuicemen

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Re: USB cable from Pi zero W to CM15A question
« Reply #9 on: January 18, 2020, 12:13:28 PM »

not that you'll notice
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LostDog88

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Re: USB cable from Pi zero W to CM15A question
« Reply #10 on: January 18, 2020, 02:04:59 PM »

Whoops. Sorry man. They are right. You have the mini and the one Brobin suggested would be right.

I forgot I use the RPi 3.

Only because I didn't want my stuff on WiFi. I use the Ethernet port connected to my switch and then placed the RPi inside the rack enclosure. Works great!

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brobin

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Re: USB cable from Pi zero W to CM15A question
« Reply #11 on: January 18, 2020, 04:11:16 PM »

Follow up question: Aside from the longer cable I have now just lying on the floor and getting in the way, would their be a response time improvement with a shorter cable - say 1.5 feet vs 6 feet?

You'd be talking very few nanoseconds.  Here's more than you'll ever want or need to know on the topic: https://bit.ly/38mnIOm  >!
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HA Dave

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Re: USB cable from Pi zero W to CM15A question
« Reply #12 on: January 19, 2020, 12:15:03 AM »

Follow up question: Aside from the longer cable I have now just lying on the floor and getting in the way, would their be a response time improvement with a shorter cable - say 1.5 feet vs 6 feet?


not that you'll notice

You'd be talking very few nanoseconds.  Here's more than you'll ever want or need to know on the topic: https://bit.ly/38mnIOm  >!

It should be mentioned... (besides the fact that it only takes 2ns for bits to travel the length of 15 feet of USB) that a Nano Second... measured as the distance it takes light to travel... is 8 1/4 inches. In other words the delay involved between 1.5 feet and 6 feet would be roughly the time it takes for light to travel about 1 foot.
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bkenobi

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Re: USB cable from Pi zero W to CM15A question
« Reply #13 on: January 21, 2020, 11:57:56 AM »

There would be more difference in signal loss than transmission time.  If you have high quality cables, anything less than ~6' will work fine.  If you have very long cables, you may need some kind of a signal booster like this:

https://www.amazon.com/IOGEAR-Booster-Extension-Cable-GUE2118/dp/B003K1L85C

I can't find a reference to the maximum cable length, but this post quotes a page that is long dead and indicates 16' is the max length for full speed.

https://superuser.com/questions/64744/maximum-length-of-a-usb-cable

Lacking the actual source document, I can't confirm if this is for USB 2 or 3.  But, since the answer was given in 2009 and USB 3 was introduced in 2008, I'd assume that the length limitation is still valid.  Here's more info if you want more background:

https://en.wikipedia.org/wiki/USB

Also worth noting is that the CM15A is not a device that can utilize high speed USB so all of this is a silly question anyway.   rofl

HA Dave

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Re: USB cable from Pi zero W to CM15A question
« Reply #14 on: January 22, 2020, 10:52:07 AM »

. Also worth noting is that the CM15A is not a device that can utilize high speed USB so all of this is a silly question anyway.   rofl

Anytime you look at NS speeds... unless you're referring to specifics in the confines of a laboratory... it's a moot point. Earth-bound humans have limited reference to a NS.
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