communication of ros with esp32 via uart and turtle_teleop_key application

Keyboard key data received with turtlesim_turtle_teleop_key is transmitted to esp32 on uart and led blink application.

• Let's run a node to start uart communication with esp on ubuntu and subscribe to / turtle1 / cmd_vel.
  • rosrun esp-idf-test serialT.py
• then subscribe and read the keys on the keyboard will start the node.
  • rosrun turtlesim turtle_teleop_key

• This example shows how to use the UART driver to handle UART interrupt.
• For esp32 devkitc boards you can connect directly to the computer via usb using micro usb inputs. It does not require extra pin connection.

• Port: UART0
• Receive (Rx) buffer: on
• Transmit (Tx) buffer: off
• Flow control: off
• Event queue: on
• Pin assignment: TxD (default), RxD (default)