Hi All, I was connecting my M100 to a Pi via the GPIO header, and you can steal power from it so my Pi -- Max3232 board -- M100 worked just fine. There were 4 wires between the Pi and the Max 3232 (power, tx, rx, gnd), and a 3 wire null modem (tx,rx, gnd) between the max board and the m100. I could use the M100 (in the term program) as the console on the Pi. Had to fix the inittab file to start the console at 9600 baud and run TERM at 9600 baud The M100 serial buffer is so small that it would drop stuff at 9600 and there is no hardware handshaking in this configuration. There is a M100 termcap floating around. This was a RPi B or a B+.
The Max3232 needs some capacitors to boost the 5v to 12v so it needs to be on a board. Replacing the Max3232 with the sparkfun converter (in THAT configuration) didn't work. I don't think the Sparkfun can convert the 5v/0v from the Pi to real RS232. I think it did work with something else but I don't remember what that was. Running the Pi with the M100 console is OK and dlplus ran on the pi if I had ANOTHER console (ie my laptop) but this wasn't really a portable solution (I could just as well connect the M100 to my laptop without the Pi), so I decided to start playing with the TPDD devices. Then I could use my phone! Or any of the myriad of android devices we have floating around. I thought about a touchscreen on a Pi as well, but they often plug into the GPIO so I'd need the TPDD/usb device anyway. And a phone is smaller and has a built in power supply, user interface (ie the touchscreen) etc..... My 2 cents. Jonathan [email protected] ________________________________________ Från: M100 [[email protected]] för Mike Stein [[email protected]] Skickat: den 9 september 2016 01:20 Till: Model 100 Discussion Ämne: Re: [M100] Getting started with mComm Well, there are really tiny converters like these, but you have to steal the Vcc from one of the signals; note that the 3232 etc. have two of each RX & TX, so you could hack a pair of control lines e.g RTS/CTS or DTR/DSR: http://www.ebay.ca/itm/5Pcs-Mini-RS232-To-TTL-MAX3232-Converter-Adaptor-Module-Serial-Port-Board-/282131187736?hash=item41b0544818:g:GBEAAOSwHoFXqZit ----- Original Message ----- From: Brian White<mailto:[email protected]> To: Model 100 Discussion<mailto:[email protected]> Sent: Thursday, September 08, 2016 5:07 PM Subject: Re: [M100] Getting started with mComm Ooh I wonder if that level shifter would work as a new replacement for a TPDD cable? Or really the same module without the db9, so you could stick it in a db25 shell instead. Instead of making the cable the somewhat hacky way the original cables were made. -- bkw On Thu, Sep 8, 2016 at 1:09 PM, Ron Lauzon <[email protected]<mailto:[email protected]>> wrote: I purchased a couple of these: https://www.sparkfun.com/products/449 It's an RS-232 to TTL converter. I've successfully used this to hook my T102 to my Raspberry PI. On Thu, Sep 8, 2016 at 1:02 PM, Jonathan Yuen <[email protected]<mailto:[email protected]>> wrote: > Hello, > > I have a general idea how to make a null modem cable but I was wondering if > anyone has the actual pinouts that work. Or are they specific to the actual > adapter? The last null modem I made didn't have hardware handshaking. The > pi didn't have handware handshaking so it was only 3 wires a level shifter. > Now I want to run to a RS-232 to USB connector and I figured I could put in > hardware handshaking. I thought if I made it DB25 to DB9 on the USB-RS232 > thing I wouldn't have so many pieces lying around. Thought I'd try it both > on the pi and on a phone/other android device. > > Poked around a bit on the web pages but didn't find anything specific.... > > Jonathan > > [email protected]<mailto:[email protected]> > ________________________________________ > Från: M100 > [[email protected]<mailto:[email protected]>] > för James Zeun [[email protected]<mailto:[email protected]>] > Skickat: den 8 september 2016 17:18 > Till: Model 100 Discussion > Ämne: Re: [M100] Getting started with mComm > > Kurt > > I plan on putting one together with some photos, maybe we could join forces? > > I'd like to make up a list of devices mComm works fine with. In theory, it > should be fine with most Android phones, in theory ;-) > > On 8 Sep 2016 4:11 p.m., "Kurt McCullum" > <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>> > wrote: > Earl, > > I'll have to do a write up on the basics. But here it is in a nutshell. > > Hardware needed > 1) USB OTG cable > 2) USB to serial adapter (FTDI is the best) > 3) db9 to db25 full NULL cable (Or equivalent adapters) > > Installing mComm for Android. > 1) From the Android Settings app, go to Security. Set "Unknown sources" to > true. > 3) Download the APK file from the members file area > Link<http://www.club100.org/memfiles/index.php?&direction=0&order=&directory=Kurt%20McCullum/mComm%20Android> > 4) Click on the APK file and it will install. > > Once it's installed, attach the OTG/USB/Serial cable to the phone/tablet and > your Model-T. Click the "Start TPDD Service" on your phone/table and then go > to your Model-T and use TS-DOS, TEENY or Floppy to transfer files back and > forth. It supports the desklink directory extensions as well as the Sardine > dictionary. > > Hope that helps. I do need to make a detailed install guide. > > Kurt > > > On Thursday, September 8, 2016 7:55 AM, Earl Evans > <[email protected]<mailto:[email protected]><mailto:[email protected]<mailto:[email protected]>>> > wrote: > > > Hi folks, > > I'm just jumping on the mComm train for the first time. I discovered that my > Samsung Galaxy S3 supports USB OTG. I have an FTDI RS232 adapter. Is there a > website that can tell me how to get started? I did some Googling but couldn't > find a basic HOWTO. > > Thanks! > > - Earl > > > > -- Ron Lauzon - rlauzon at acm dot org Homepage: http://webpages.charter.net/rlauzon/ Weblog: http://ronsapartment.blogspot.com/ DNRC: Lord of All Things That Are Fattening "To be sure, conservative radio talk show hosts have a built-in audience unavailable to liberals: People driving cars to some sort of job." - Ann Coulter Microsoft Free since July 06, 2001 Running Ubuntu 16.04
