I would say it is interfering with D13 (as this is the direction pin), but someone has suggested that it is interfering with the speed pin. I am trying to do an obstacle avoidance program but something is interfering with one of those pins.

If anyone can help with this I would really appreciate it!!!!Īll motors work really well with other code but as soon as I add any kind of Ping functionality the B motor (connected to Pin 11 speed and Pin 13 direction) starts only going in reverse.

However, I am really struggling to find out how to use the Fundomoto shield with the HC-SR04 distance sensor though. I have not been able to plug it directly in (using the RX and TX pins provided), but I have been able to get the HC-05 working successfully with the fundomoto board with it using pins 2 and 3. Has anyone got a sketch that does not use Softwareserial to change to AT mode that I can test the RX and TX pins, or any other ideas on how to troubleshoot this problem. Is this perhaps the problem? But the Bluetooth module is flashing, so it is getting power.

I am still powering the shield from the USB of the computer. I am not sure if my problem is that I am used to using the SoftwareSerial.h library, and I am not sure that it allows the use of the RX and TX pins? Could this be my problem? I have just plugged it in to the Bluetooth Interface (and hope it is not damaging anything), but still it is not working. My HC-05 module (and I think HC-06 bluetooth modules also), can only accept 3.5V at their RX pin. The datasheet says 'Two-way bluetooth interface requires no wiring and you can plug directly' so does this mean that the voltage at the TX of the Shield has been stepped down from 5V to 3.5V or lower? I am not sure if all bluetooth modules require lower voltage at the Rx pin (so not sure if this 'plug directly' also applies to the HC-05). I am using an Arduino UNO with the shield (and have not had trouble with running DC motors or Servo or Distance sensor through the shield).īUT I can't get the Bluetooth part of the shield to work, and I need them all to work together.

L298n motor driver arduino fritzing