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04-27-2020, 06:11 PM
(This post was last modified: 04-27-2020, 06:12 PM by comraider.)
Hi, new user here. I just ordered and received a WiModem232, intending to use it with my C-128DCR. I have a GGLabs Turbo232/Swiftlink clone that I'm using to hook it up.
I'm in 64 mode, using CCGMS, set to 300 baud, 8N1, and am able to receive the power-up messages from the modem just fine. (Looking for router, no router located, Filesystem Ready). However, the modem won't respond to any commands. ATI, AT, etc. don't send back anything.
I tried Desterm 128 in 128 mode, and it behaved exactly the same way. Not sure what I'm missing here?
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I have never tried this myself, but as long as the cable is correct then it should work. Can you verify your cable is good? You could try sending a command to the WiModem, like AT*REBOOT to see if the receive line is getting there. I do program and test each WiModem232 before it ships.
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(04-27-2020, 07:15 PM)admin Wrote: I have never tried this myself, but as long as the cable is correct then it should work. Can you verify your cable is good? You could try sending a command to the WiModem, like AT*REBOOT to see if the receive line is getting there. I do program and test each WiModem232 before it ships.
I'm using a known-good DB25 to DB9 adapter since the Turbo232 card has a DB9 port. I'm also seeing the same behavior on an old XP-era PC with a real serial port, so I think we can rule out the Turbo232.
For fun I also tried a USB-to-serial cable on my modern Linux PC--same results.
All I can think of is the modem not liking my adapter for some reason, but I can't fathom why.
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Maybe the adapter is bad or perhaps has some pins jumpered that are interfering with other pins? Do you have a DB-25 based RS232 interface or cable? Make sure you are not using a NULL modem adapter or cable. That will never work. You need a modem cable or adapter.
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(04-27-2020, 11:43 PM)admin Wrote: Maybe the adapter is bad or perhaps has some pins jumpered that are interfering with other pins? Do you have a DB-25 based RS232 interface or cable? Make sure you are not using a NULL modem adapter or cable. That will never work. You need a modem cable or adapter.
It's not a null adapter. I last used it to hook up a PC with a modem with a DB-25 port using a modem cable.
I'll order a DB-9 to DB-25 modem cable just to be safe. Weirder mysteries have happened with retro gear.
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Like I said before, I program and test these before shipping. The programming is actually done on my Amiga 1200 using a terminal program, so both transmit and receive have to work or I can't program it at all. I also test the wireless connection and format the filesystem (there is 3MB of available storage space that will be accessible remotely with a future firmware update).
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Works fine with the new cable I got. The weird thing is, that adapter works fine with a real modem I have. Curious. But at least this is working now. Thanks for your help!
The file system access would be pretty cool indeed! Looking forward to that.
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Glad that it is working. There must be something in that cable (like RTS, CTS, DTR, or DSR) that is different from the new one you have that works. I know a LOT of cables tie some of the handshaking pins together. You need to be using a complete 9 pin or 25 pin pass through. It's usually the DB9 to DB25 cables that tie the handshaking lines or DCD line.