how to connect GSM module>SIM900D> to arduino? do i need to use R232 to TTL converter?
i want to test AT-commands in hyperterminal… tnx
up…
Google has a lot on the subject.
Your best resource on this is going to be the datasheet for your particular GSM module. Generally with those modules, there are ‘typical wiring diagrams’ in the datasheet, which is likely what you want to reference. Also, you will likely want a separate power supply, as GSM modules tend to draw much higher current than Arduino pins can source. Also, as mentioned above, getting on Google and looking at other projects will be helpful, and you may even be able to find some example code.
If you are using an Arduino board, you should be able to communicate with the board over USB without needing to use an RS232 to TTL converter.