The RedBot mainboard has a built-in green LED light that can be controlled by your program. The LED is hardwired to pin D13 on the RedBot mainboard and is located near the center-right of the mainboard.
The LED can be used to provide alerts or feedback (usually in combination with sound from the speaker).
To use the LED light in your robot app, you will need to:
Declare a global variable to store the LED's pin number
Set the pin mode for the LED
Use the digitalWrite() method to turn the LED on and off
You'll need to create a global variable to store the pin number of the LED, which is connected to pin D13. Add this code statement before the setup() function:
You'll need to set the pin mode for the LED. Add this code statement within the setup() function:
The digitalWrite() method can be used to send an "on" or "off" signal to the LED by using a value of either HIGH or LOW:
HIGH will turn on the LED
LOW will turn off the LED
After turning on the LED, you will typically use the delay() method to add a waiting period (in milliseconds) before turning off the LED.
For example, the following code will turn on the LED for 0.5 seconds and then turn it off:
You can code your own sequence of digitalWrite() and delay() statements to make the LED turn on and off in different patterns (e.g., double blink, slow blink, fast blink, etc.)