[En-Nut-Discussion] Motorola G18 how-to ?

[Krzysztof Drewicz]

Marek Ziółkowski napisał(a):

> Krzysztof Drewicz napisał(a):
>
>> Hello,
>> I've got G18 GSM  OEM modem module, maybe someone could share his 
>> experiences about connecting to ethernut?
>> Any problems? maybe someone have running GPRS-networking on this module?
>>
> Tak sie sklada, ze jakis czas temu sprawilem sobie Motorole G18 i 
> planuje ja polaczyc do plytki z atmega128, na ktorej dziala NutOS.
> Narazie wszystko jest w fazie planów. Chce dorobić do G18 interfejs 
> RS232, zeby najpierw potestowac sam modul na kompie, a potem podlaczyc 
> do mikrokontrolera (tez via RS232).
> Jak chcesz moge Ci przeslac jakies schematy.
>
> Tak z ciekawosci chcialbym spytac, jakie urzadzenie planujesz zbudowac?

Sorry for non-english chat on the list.
Summary of above goes like that: I would like  to connect G18 via 
RS232c, to test with my PC, and after some test, connect to uC/EtherNuttie.

In my opinion connection could be done on 3.3V (CMOS) level, on the 2nd 
serial port of Nuttie.
The 1st RS232c should be connected to pc for some debugging etc.

Is there any reason of doing G18 (3.3V) -> Max323 RS232c (+/- 12V) -> 
max323 Ethernut(3.3V) ?


-- 
Krzysztof Drewicz