WiFi RS-232 Modem - Page 2

gururise · 22 August 2017, 02:00

This thing should be easy to build as all the software/firmware are open source. The only proprietary part is the board layout and circuit, which isn't too hard since its basically an ESP8266 and some ttl <-> rs232 ic's.

idrougge · 22 August 2017, 12:57

See attachment. It can even be implemented without soldering.

Mr.Flibble · 23 August 2017, 22:06

That seems simple enough...

Presumably the other one is using the usb port for power?

Mr.Flibble · 26 August 2017, 13:35

I've knocked together a pcb design - need to test it out, but hopefully it'll work okay.

Good thing about the Amiga is that it supplies 12V via the serial port, so with the right regulator, you can power the whole thing without any additional wires, unless I'm missing something..

ElectroBlaster · 26 August 2017, 13:59

Excellent stuff

idrougge · 27 August 2017, 13:32

Quote:

Originally Posted by Mr.Flibble

Good thing about the Amiga is that it supplies 12V via the serial port, so with the right regulator, you can power the whole thing without any additional wires, unless I'm missing something..

While it does, it seems to be rated 20 mA max. The ESP chip consumes a lot more at peak levels, hence I power it via the joystick port.

Mr.Flibble · 27 August 2017, 16:01

I've also included a DC jack and a jumper to disable/enable internal power, so it should be good regardless

ferrellsl · 28 August 2017, 18:10

Is there any way to use this as a SLIP device? Cool device but if all I can do is use it for connecting to text based bulletin boards and telnet-ing then I'll pass.

Sinphaltimus · 28 August 2017, 19:21

Quote:

Originally Posted by ferrellsl

Is there any way to use this as a SLIP device? Cool device but if all I can do is use it for connecting to text based bulletin boards and telnet-ing then I'll pass.

Exactly this. I actually have a Wifi232 modem connected to my TI-99/4a and it is only used for BBS'ing. I'd have to alter it slightly (add a jumper bridge) to make it compatible with my amiga (enable rts/cts). But I have not done it yet because of this very question. AFAIK - it's not for web browsing. Hopefully someone has another solution (how to configure it as SLIP).

I think the issue is that it does indeed act as a hayes compatible modem meaning you'd need a terminal program to "dial" out to a telnet session.

idrougge · 28 August 2017, 22:54

Quote:

Originally Posted by ferrellsl

Is there any way to use this as a SLIP device? Cool device but if all I can do is use it for connecting to text based bulletin boards and telnet-ing then I'll pass.

Indeed there is, that's what I've been using it for.

ferrellsl · 01 September 2017, 01:37

Quote:

Originally Posted by idrougge

Indeed there is, that's what I've been using it for.

Do you mind sharing your solution or do you routinely pop in just to keep people in suspense?

kolla · 01 September 2017, 07:47

Quote:

Originally Posted by idrougge

Indeed there is, that's what I've been using it for.

Why SLIP instead of PPP?

ferrellsl · 01 September 2017, 09:20

Quote:

Originally Posted by kolla

Why SLIP instead of PPP?

Because PPP is used to establish a direct data connection between two computers in a point-to-point connection. I want to establish an IP connection between my Amiga and my router using this serial line device....hence the name "SLIP" short for Serial Line Internet Protocol

PPP is great for a modem-to-modem or a PC-to-PC connection (NULL modem cable) but that is not my goal. I want to use this device as a wireless NIC to surf the web.

kolla · 01 September 2017, 11:45

So SLIP is what the ESP8266 supports? Gotcha.

I only used it via some python libs earlier, not even pretending to run local ip stack.

ferrellsl · 01 September 2017, 18:25

Quote:

Originally Posted by kolla

So SLIP is what the ESP8266 supports? Gotcha.

I only used it via some python libs earlier, not even pretending to run local ip stack.

It may support other protocols but SLIP should be the easiest to implement since this device connects to the Amiga via the serial port. But performance would be limited to the serial port's max throughput.

I did a little research and it appears that about the only IP stack for classic Amigas that supports SLIP is Miami. I'm tempted to buy one of these and give it a try but I'd like to hear from someone else first about performance and ease of setup via Miami and any potential pitfalls.

kolla · 01 September 2017, 18:30

Quote:

Originally Posted by ferrellsl

I did a little research and it appears that about the only IP stack for classic Amigas that supports SLIP is Miami.

That can't be right, I used SLIP over null-modem with AmiTCP way back in '94-95, before PPP came around.

ferrellsl · 01 September 2017, 18:33

Quote:

Originally Posted by kolla

That can't be right, I used SLIP over null-modem with AmiTCP way back in '94-95, before PPP came around.

You're probably right. The info I came across was very old and had references to Termite, Miami and AmiTCP. It's possible that SLIP was added to AmiTCP after the article I came across was written. I think it was dated 1992 or maybe '95.

Here's the link I found and it's obviously quite old.

http://www.amigareport.com/ar412/feature1.html

kolla · 01 September 2017, 18:37

Quote:

Originally Posted by ferrellsl

You're probably right. The info I came across was very old and had references to Termite, Miami and AmiTCP. It's possible that SLIP was added to AmiTCP after the article I came across was written. I think it was dated 1992.

No, anyone doing dial-up to Internet over modem back then used SLIP, PPP was not invented yet.

http://aminet.net/package/comm/net/AmiTCP-bin-30b2

See, rhslip.device and rhcslip.device are in there

ferrellsl · 01 September 2017, 18:46

Well, it would be nice if idrougge would share his configuration info and any pointers. I'd also like to know what kind of throughput he's getting.

nogginthenog · 01 September 2017, 19:31

Roadshow claims to support SLIP also:

Quote:

http://roadshow.apc-tcp.de/index-en.php

Software-only drivers such as "slip.device", "plip.device" or the "ppp-serial.device" driver included with Roadshow are supported, too.

22 August 2017, 12:57	#22
idrougge Registered User Join Date: Sep 2007 Location: Stockholm Posts: 4,332	See attachment. It can even be implemented without soldering. Attached Thumbnails

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22 August 2017, 02:00	#21
gururise Registered User Join Date: May 2016 Location: Los Angeles Posts: 67	This thing should be easy to build as all the software/firmware are open source. The only proprietary part is the board layout and circuit, which isn't too hard since its basically an ESP8266 and some ttl <-> rs232 ic's.

23 August 2017, 22:06	#23
Mr.Flibble Registered User Join Date: Jun 2015 Location: UK Posts: 472	That seems simple enough... Presumably the other one is using the usb port for power?

26 August 2017, 13:35	#24
Mr.Flibble Registered User Join Date: Jun 2015 Location: UK Posts: 472	I've knocked together a pcb design - need to test it out, but hopefully it'll work okay. Good thing about the Amiga is that it supplies 12V via the serial port, so with the right regulator, you can power the whole thing without any additional wires, unless I'm missing something..

26 August 2017, 13:59	#25
ElectroBlaster Junior Member Join Date: Mar 2002 Location: Exeter, Devon, UK Age: 49 Posts: 1,705	Excellent stuff

27 August 2017, 16:01	#27
Mr.Flibble Registered User Join Date: Jun 2015 Location: UK Posts: 472	I've also included a DC jack and a jumper to disable/enable internal power, so it should be good regardless

28 August 2017, 18:10	#28
ferrellsl Banned Join Date: May 2017 Location: Mesa Posts: 39	Is there any way to use this as a SLIP device? Cool device but if all I can do is use it for connecting to text based bulletin boards and telnet-ing then I'll pass.

01 September 2017, 11:45	#34
kolla Banned Join Date: Nov 2007 Location: Trondheim, Norway Posts: 1,893	So SLIP is what the ESP8266 supports? Gotcha. I only used it via some python libs earlier, not even pretending to run local ip stack.

01 September 2017, 18:46	#39
ferrellsl Banned Join Date: May 2017 Location: Mesa Posts: 39	Well, it would be nice if idrougge would share his configuration info and any pointers. I'd also like to know what kind of throughput he's getting.

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