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Topic: GPRS Shield + servo => vibrating servo (Read 1 time) previous topic - next topic



I'm using a GPRS Shield (Seeedstudio sim900) to send and to receive data from my server. Everything works fine.
However, when I'm connecting a Servo on a pin (pin 5 for exemple) the servo doesn't work correctly and vibrates.

If I'm using the same code without the GPRS Shield, servo is OK.

Does the GPRS shield interact with PIN 5 ? (The seeedstudio documentation describes the pin 5 as available).

Do you thing that it could be a power supply problem ?

Thanks a lot for your help !!


Do you thing that it could be a power supply problem ?

Possibly. How is the servo powered? Didn't you think it important enough to mention that?
The art of getting good answers lies in asking good questions.


Servo is powered by the Arduino and the Arduino is powered by USB...
I have ordered a 9V/1A power supply to be sure.

Thanks for your answer !


Hi, sorry for my english i'm french..
But i have a sim900 (seedstudio) too and i would like to command a servomoteur with my phone(sms).
but i don't find program for this.. must i use Arduino as interface or a other software?
have you got the programme that i need ?
Thanks a lot for your help

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