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lpc2368 hardware connection sim300dz

armsistem armsistem

Hi , I connection lpc2368 with sim300 dz but I have a big problem.lpc2368 uart1 (modem) with sim300 dz see the picture
(cdn-users1.imagechef.com/.../uimgc7be66dc04fe89a8.jpg)
I send command 'AT' not reply 'OK' modem status led blinking.

- I wonder not startup modem sim 300dz.
- ¦ RTS1 ¦ CTS1 ¦ DTR1 ¦ DSR1 ¦ DCD1 ¦ RI1 How can I use ports ?
- If you send it to the sample program.

Everyone Thanks