I would like to combine the GPRSshield with an Arduino Mini Pro 5V to build an compact sensor.
I am not sure what voltage the GPRSshield needs. My Mini only has 5V available. Will I have to provide the 3.3V too? (or only the 3.3V?)
I’ll have to connect the TX, RX (7,8) the GND, 5V ? Is there something else what I’ve to do?