Master-slave configuration of ROS Raspberry Pi and computer

First you need to know:

• Raspberry Pi IP address
• PC IP address

Raspberry Pi as the host

• Open the bashrc file in the root directory (there must be content inside, if it is not opened correctly)

sudo vim ~/.bashrc

• Add content inside:

export ROS_MASTER_URI=http://主机IP：11311
export ROS_IP=树莓派IP

The two addresses of the host are the IP addresses of the Raspberry Pi, just replace them

PC is the slave

• Open the bashrc file in the root directory (there must be content inside, if it is not opened correctly)

sudo vim ~/.bashrc

• Add content inside:

export ROS_MASTER_URI=http://主机IP：11311
export ROS_IP=PC端IP

Here the host address is the IP address of the Raspberry Pi