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sending AT command to phone

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jojokatada

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will anybod enlighten me in sending AT command to the cellphone. i have tried the hyperterminal with an MBUS/FBUS DLR-3p cable (home made) to nokia 7110, 5110 and 3310 GSM phone.
as i know that MBUS uses 9600 baud half duplex mode and the FBUS use 19200 full duplex mode, but so far still failed in receiving a reply from the phone when i send AT commnad ( throuhg hyperterminal). i ve also been trying to program at MCU pic16f877a using the serout2 and serin2 command of picbasic pro but still fails in recieving "OK" when send "AT" command
any help suggestions are welcome.
 

Use Siemens phone x35, less complex, or visit this page for sending

sms using Nokia phone and F-bus ptotocol

h**p://www.embedtronics.com/nokia/fbus.html#part2
 
yes i did visit that page several time but than i made the FBUS cable from the post of website too but stil failed
 

glenjoy said:
You cannot use AT commands using MBUS/FBUS, what you need is a different cable.
Click to expand...



he Glenjoy how did you know that can't using MBUS/FBUS to send an AT command the the phone.

did you have experiment on that before?
please give me some information
 

Search google and you will find more info, Nokia cellphones are quite tricky, to access their modems, you need a different kind of cable, the one with a microcontroller inside, our FBUS/MBUS cables only has either a MAX232 or its variant or a logic inverter IC.
 

Hi,

Use this link on how to build a DLR-3 cable ( AT Command to MBUS protocol)
**broken link removed**

Good luck.
 

Yes the nokia phones are very tricky in to access the AT command
i try different nokia phone it give different reply.

appreciate for the help
 

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