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Install 3.5’’ IPS Screen Driver on RetroPie

This section explains how to install the 3.5’’ IPS screen driver on the RetroPie system. You will first access your Raspberry Pi via SSH, and then install the driver so that the RetroPie interface can be displayed on both the HDMI monitor and the 3.5’’ screen.

Install 3.5’’ IPS Screen Driver (Important)

Connect your Raspberry Pi to a monitor and power it on. Make sure an Ethernet cable is also connected so the device can access the network.
Once the RetroPie interface appears, press F4 on the keyboard to exit and enter the command line interface.
To enable SSH, run the following command:
```
sudo raspi-config
```
In the menu, navigate to: Interface Options → SSH → Enable.
(Optional) If you want to connect using an IP address, you can check it by running:
```
hostname -I
```
You will see output similar to:
```
192.168.100.119 xxxx.xxx
```
On your computer, open a terminal and connect to the Raspberry Pi via SSH using one of the following methods:
- Using hostname (recommended):
```
ssh pi@retropie.local
```
- Using IP address:
```
ssh pi@IP_ADDRESS
```
  For example:
```
ssh pi@192.168.100.119
```
When connecting for the first time, type yes to confirm, then enter the default password:
```
raspberry
```
After logging in, run the following commands to install the 3.5’’ IPS screen driver:
Note
- For the RetroPie system, make sure you are using the version provided in Retropie Download page (Raspberry Pi 4 only).
```
sudo rm -rf LCD-show-retropie
git clone https://github.com/sunfounder/LCD-show-retropie.git
chmod -R 755 LCD-show-retropie
cd LCD-show-retropie/
sudo ./MHS35IPS-show
```
Once the installation is complete, the Raspberry Pi will reboot automatically.
- After rebooting, both the HDMI monitor and the 3.5’’ IPS screen will display the RetroPie interface.
- The startup process may take 1–2 minutes, so please wait patiently.

Rotate the Display

You can rotate the display and touch orientation by running:

cd LCD-show-retropie/
sudo ./rotate.sh 90

The system will reboot automatically. After restart, the screen and touch orientation will be rotated to 90°. You can replace 90 with 0, 180, or 270 to set the desired rotation.