Hello everyone.
I have a project which consist to use 2 motors DC and 2 servomotors with my arduino UNO and the motor shield adafruit.
In addition, i want to use a bluetooth module. I need so to use the pins 5V, Gnd and two digital pwm.
A friend told me that i can use without worrying all the pins even if i have the motor shield but i think he's wrong Are not some pins already used by the motor shield?
If i'm right, how can i do for connect my bluetooth module?
You will have more than enough pins with the Uno.
There are two types of Bluetooth modules, serial interface and SPI. Which do you have? Still you will have enough pins.
Motor shield two pins per motor, one pin per servo. Number of pins for interfacing on a Uno 20.
I'm not sure I get the difference between SPI and serial interface. I have the bluetooth module HC-06 and I think, with my research, that it's a serial inteface one.
When you say that I have enough pins in my arduino, you say that i can't realy use the pins which are used by the motors ?
By and large you can only use one pin for one thing. The exception is the busses, that is I2C and SPI. There is always Google to find out what these are.
Thanks
I think i know now how to make it work