Pager UPI

[EMS Geek]

Hi,
I am trying to build a pager programming interface for the advisor gold, but am not having much luck, though it will work with the Minitor III.

I have two interfaces, one uses the MAX233 chip and the other a 74HCT14 chip, yet neither seem to be able to communicate with the pager.

Does anyone have any hints or insight specific to the advisor gold?

Thanks, Eric

[Steve]

I've used an interface I made with a MAX233 and a single resistor with Advisor Golds and Elites before. If you just tie the tx and rx lines together it won't work. You need something like a 10K resistor between the tx line and rx line/pager

Steve

[alex]

I have made a prorammer that works for the Minitor 3 using the Max232 schematic. There is nothing else added inline with the pager, and it works fine. We've programmed 2 different Minitor 3's and several Advisor pagers.

Do you have a URL for which you aquired this schematic? I'll see if it's the same one we used.

-Alex

[Bob]

Steve,
I'm also using the one with the MAX233 chip, and trying to get it to work with the Advisor Gold. What I think I'm hearing is to connect the RX line and the GND to the pager, and then tie the TX line to the RX line via a 10K ohm resistor. Is this correct? Thanks.

[EMS Geek]

Thanks for the info.

The MAX233 interface I got in a swap for a Minitor III programming nest.

The 74HC14 came from this site:
http://www.geocities.com/SiliconValley/ ... /pf56a.htm

The other one came from here:
http://groups.yahoo.com/group/lmrpager/ ... 32-ttl.gif
Comparing it to the MAX233 it is essentially the same with out the built-in capacitors.

I will try adding a resistor to the MAX233 interface.

Is there other software available for the aadvisor gold or only from Motorola.

Thanks, Eric

[EMS Geek]

Also, the 74HC14 uses a Schottky diode betwwen the Tx/Rx lead, but unfortunately I don't know which type and I cant get ahold of the author.

Thanks again, Eric