tag:blogger.com,1999:blog-2836700939935266529.post5402730679966480511..comments2022-04-07T18:10:13.915-04:00Comments on Das Bityard: Raspberry Pi Serial Console in LinuxUnknownnoreply@blogger.comBlogger14125tag:blogger.com,1999:blog-2836700939935266529.post-1824889124848146402012-12-01T19:45:28.981-05:002012-12-01T19:45:28.981-05:00"Remember that you have to connect the cable&..."Remember that you have to connect the cable's TX wire to the Pi's RX pin, and the cable's RX wire to the Pi's TX pin."<br /><br />THANK YOU!!! Such a noob mistake, but I was banging my head against the wall for 3 hours before seeing your post and realizing how dumb I was.<br /><br />BTW I'm using a CP2012 USB adapter (couple bucks on eBay) and it's working great.Chuanhttps://www.blogger.com/profile/15285590679927181511noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-78973754073745994412012-08-14T16:10:39.409-04:002012-08-14T16:10:39.409-04:00If you buy the cable from Adafruit, you might as w...If you buy the cable from Adafruit, you might as well get their Raspberry Pi specific cable (much cheaper and easier to connect!):<br /><br />https://www.adafruit.com/products/954<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-16769628685415319842012-07-24T08:59:22.365-04:002012-07-24T08:59:22.365-04:00@Jimbo: awesome, glad it worked out. Good luck!@Jimbo: awesome, glad it worked out. Good luck!charleshttps://www.blogger.com/profile/08545079426709448716noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-78825868605697729372012-07-24T05:43:04.302-04:002012-07-24T05:43:04.302-04:00@charles, Jimbo here, Yes the cp2102 adapter is wo...@charles, Jimbo here, Yes the cp2102 adapter is working, logging in with screen. I thought I had a bad component, but I think I was just not waiting long enough to get the tty. I detached the screen session and a minute later I re-attached and there was the login prompt. I also ordered a similar, pl2303 based USB to TTL serial adapter but it hasn't arrived yet. Anyhow, woo hoo, just getting started.Jimi Jameshttps://www.blogger.com/profile/05039223969112705784noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-55392782384868804562012-07-22T14:22:03.027-04:002012-07-22T14:22:03.027-04:00@Jimbo: That looks like a great USB to TTL serial ...@Jimbo: That looks like a great USB to TTL serial adapter for the price. I haven't heard of the CP2102 chip. Let me know how well it works.charleshttps://www.blogger.com/profile/08545079426709448716noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-40711127454922451312012-07-22T01:37:00.885-04:002012-07-22T01:37:00.885-04:00I got this on ebay:
http://www.ebay.com/itm/1906...I got this on ebay: <br /><br />http://www.ebay.com/itm/190685792376<br /><br />It's labeled with the different voltages right at the pins. Just got my Pi, trying serial tty in Raspbian next.Jimbonoreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-7072415638889878142012-06-26T17:50:20.960-04:002012-06-26T17:50:20.960-04:00J Gol: You can't (or at least certainly should...J Gol: You can't (or at least certainly shouldn't) use a USB to RS232 directly with the Pi. RS232 voltage levels are too high (5-12V typical). The Pi needs something that speaks the serial protocol at a much lower voltage (3.3V). You can possibly find a cable or adapter that converts the RS232 signals down to 3.3V, but it's probably cheaper and easier to buy a USB phone data cable like the one zoobab linked to and cut off the phone connector.charleshttps://www.blogger.com/profile/08545079426709448716noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-4984013058219176402012-06-26T17:09:42.635-04:002012-06-26T17:09:42.635-04:00I tried with a usb to rs232 cable from radio shack...I tried with a usb to rs232 cable from radio shack that I already had. I took a cdrom audio cable, pulled the pins from inside the connector and put them on the 3 pins on the rs232...got it to output to the screen, but it was a bunch of funny characters. Not sure where to start troubleshooting to fix it.Anonymoushttps://www.blogger.com/profile/06004093446152437195noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-27672249668648853272012-06-26T16:31:06.466-04:002012-06-26T16:31:06.466-04:00AFAIK the raspberry draws around 700 mA max curren...AFAIK the raspberry draws around 700 mA max current. Be careful. This is above 500 mA USB port spec max and might easily fry your USB port.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-71041636666827628832012-06-26T15:14:13.015-04:002012-06-26T15:14:13.015-04:00Just order those cheap Nokia clones at Dealextreme...Just order those cheap Nokia clones at Dealextreme:<br /><br />http://www.zoobab.com/nokia-ca42-3-3vzoobabhttps://www.blogger.com/profile/16896135106354266238noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-66197669648468404142012-06-26T08:19:50.869-04:002012-06-26T08:19:50.869-04:00I power my pi from my TV's usb port with no pr...I power my pi from my TV's usb port with no problems , whilst hooked up to same 22" 1080p tv.if it powers a 2.5 usb hdd it will power a pi. good luck.cirrus minorhttps://www.blogger.com/profile/05109312974355236439noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-67066760814338805242012-06-26T04:11:18.342-04:002012-06-26T04:11:18.342-04:00Thanks for posting this ! One question remains to ...Thanks for posting this ! One question remains to me though:<br /><br />Wouldn't it be easier to grab one of those USB to RS232 adapters (essentially a USB COM port) instead of using the GPIO connector plus a voltage converter ? <br /><br />Those thingies cost below 6€.<br /><br />I really wonder why they didn't use the standard symmetrical voltage for the RS232 board. Those RS232 Max ICs costed only a few cents back then and easily generated +/- 15V from a 5V power supply.<br /><br />- HolgerAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-91201511336531920332012-06-25T16:47:57.638-04:002012-06-25T16:47:57.638-04:00@Anonymous:
Yep, that looks like a good source. I...@Anonymous:<br /><br />Yep, that looks like a good source. I think one of those cables is the same thing that Adafruit sells. (And prices are similar.)charleshttps://www.blogger.com/profile/08545079426709448716noreply@blogger.comtag:blogger.com,1999:blog-2836700939935266529.post-26283491404646717172012-06-25T16:09:43.055-04:002012-06-25T16:09:43.055-04:00Here is a site for cables.
Rs232 to TTL lvls. Pro...Here is a site for cables. <br />Rs232 to TTL lvls. Probably what you were looking for. I found this handy myself not so long ago<br /><br />http://www.ftdichip.com/Products/Cables/USBTTLSerial.htmAnonymousnoreply@blogger.com