This week I attached the ultrasonic sensor to the board.

Ultrasonic sensor = measures the distance of the nearest object, sending the result to the serial port. It can work from 2 cm to 3 m. It measures the time spent by the signal to reach the object and return to the sensor. (definition given on https://create.arduino.cc/projecthub/Nicholas_N/distance-measurement-with-an-ultrasonic-sensor-hy-srf05-64554e)

Connecting the module :

Ultrasonic module   to     Arduino

Black Gnd   to                  Gnd

Yellow +5V  to                Vcc

Blue Trigger  to               D8

Red Echo  to                    D7

 

 

 

 

 

 

 

 

This was the first sketch I tried to run. It uploaded with no errors however it only produced ‘-1’meaning that the ultrasonic sensor was ‘out of range’. I tried moving it around however this made no change.

 

It was then suggested that the wire had a connection issue. So instead we all tried plugging the sensor directly into the board. We had to edit the sketch to do this, changing the pin mode to 8 and 11. This worked well and the sensor started to produce numbers meaning it no longer thought the module was ‘out of range’.