Apple //c connect to RS232 Wifi modem

Freshestcream

Tinkerer
Nov 4, 2021
13
32
13
Milwaukee
Hey folks,
Today I've been trying to connect my //c to the net using the RS232 wifi modem from the old net and Proterm 3.1. I built a cable that should allow communication. However, Proterm is unable to init the modem no matter which Hayes modem I select from the list. Are there additional settings I need to set or is something else wrong? I've used this wifi modem with a Mac before so I know that device is functional.
The cable I built like this:
DB9 ---> Din5
2 ---> 2
3 ---> 4
5 ---> 3
I'd appreciate and help. Thanks.
 

Drake

TinkerDifferent Board Vice-President 2023
Staff member
Sep 23, 2021
447
782
93
Hey folks,
Today I've been trying to connect my //c to the net using the RS232 wifi modem from the old net and Proterm 3.1. I built a cable that should allow communication. However, Proterm is unable to init the modem no matter which Hayes modem I select from the list. Are there additional settings I need to set or is something else wrong? I've used this wifi modem with a Mac before so I know that device is functional.
The cable I built like this:
DB9 ---> Din5
2 ---> 2
3 ---> 4
5 ---> 3
I'd appreciate and help. Thanks.
Is your baud matching the previous set speed?
It's been ages since I had the IIC out for this stuff :S
 

Freshestcream

Tinkerer
Nov 4, 2021
13
32
13
Milwaukee
I've reset it to the default 300 baud and it still doesn't initialize the modem. My best guess is I made the cable wrong or don't know how to use the software correctly. Anyone have a pinout to a modem cable? I can only find the pinout to a null modem from the ADTpro site.
 
Nov 4, 2021
126
98
28
Tucson, AZ
I think you just need to flip your TX and RX pins on either end. DE9#2 should go to DIN5#4 and DE9#3 to DIN5#2.
Serial is notorious for this confusion. One end of the connections TX needs to connect to the other end's RX(RD) and vice versa. Connecting TX to TX gets you Twitter: both ends talking but neither listening.