Hello!
I've a problem interfacing a modem with AVR. I'm working in a remote control via Telephone.
I use a US Robotics 56K Modem and AT90S8535 (in STK500).
I connect the modem with PC by RS232 Port, from Hyperterminal i use AT Commands to control the modem. By example, ATD5286 (Calling to other extension), Auto answer, config the modem and other things.
But in the AVR i make a program that sends ATD5286 by RS232 Port... (in order to dial up with the AVR) and the modem doesn't respond. No lights, nothing.
By last, i connect the AVR with Hyperterminal and i can see the commands that i sent with MCU.
Anyone who can help me???
I've a problem interfacing a modem with AVR. I'm working in a remote control via Telephone.
I use a US Robotics 56K Modem and AT90S8535 (in STK500).
I connect the modem with PC by RS232 Port, from Hyperterminal i use AT Commands to control the modem. By example, ATD5286 (Calling to other extension), Auto answer, config the modem and other things.
But in the AVR i make a program that sends ATD5286 by RS232 Port... (in order to dial up with the AVR) and the modem doesn't respond. No lights, nothing.
By last, i connect the AVR with Hyperterminal and i can see the commands that i sent with MCU.
Anyone who can help me???