I need to have the Arduino power on the GSM module. From the instructions of the GSM it shows that I need to pull down the power button of the GSM:
User can power on the GPRS module by pulling down the PWR button or the P pin of the control interface for at least 1 second and release. This pin is already pulled up to 3V in the module internal, so external pull up is not necessary.
I am just not sure of the electrical connections. Can I go directly from the module to the Arduino or do I need to have a resistor some where in the path.
Any help would be appreciated.