**Preparation Tools:**
You will need a USB drive, a TTL to USB cable (such as CH340G or CP2103), and PuTTY software. You can download PuTTY from the following link: [putty.zip](http://example.com/putty.zip) (280.1 KB).
**Step 1: Connect and Install the TTL to USB Cable**
Contact the seller to request the TTL to USB cable and install it on your computer. Once installed, go to "My Computer" > "Properties" > "Device Manager" > "Ports (COM & LPT)" > select the COM port (e.g., COM3, COM4, etc.) > Right-click and choose "Properties" > Go to "Port Settings" > Set the Baud Rate to "115200" > Click "OK".
**Step 2: Launch PuTTY**
Open the PuTTY application. Enter the COM number you identified in the previous step (based on your system’s COM port assignment). After configuration, click "Open" to start the session. Power on the set-top box. At this point, PuTTY should begin running the code. If nothing happens, check the TX and RX lines on the TTL cable—sometimes they are swapped.
**Step 3: Connect the USB Drive and Prepare Files**
Download the necessary files onto the USB drive. Rename the files according to the instructions below before inserting the drive into the Kyushu PTV8508 box’s USB port:
- **Shafa1.apk** – Sofa Butler Desktop (Download: [Sofa Butler Desktop](http://app.shafa.com/apk/shafazhuomian.html))
- **Shafa2.apk** – Sofa Butler (Download: [Sofa Butler](http://app.shafa.com/apk/shafa2.html))
- **PackageInstaller.apk** – Must be downloaded (otherwise installation won’t work online) (Download: [PackageInstaller.apk](http://example.com/PackageInstaller.apk) - 363.95 KB)
**Step 4: Connect the TTL Cable Correctly**
Follow the wiring sequence from left to right:
1 = GND
2 = No connection
3 = TX
4 = RX
Once connected, power on the Kyushu PTV8508. The device should boot, and PuTTY should start executing the commands.
**Step 5: Run Commands via PuTTY**
Start by entering the following commands one at a time (do not type Chinese characters):
```bash
su
```
Grant root access.
```bash
mount -o remount,rw /system
```
Mount the system partition as read-write.
```bash
df
```
Check if `sda1` exists. If not, reinsert the USB drive and run `df` again.
```bash
cd /mnt/sda/sda1
```
Navigate to the USB drive’s mount point (ensure the path is correct based on your system).
```bash
cp Shafa1.apk /system/app
cp PackageInstaller.apk /system/app
```
Copy the required APKs to the system app directory.
```bash
mount -o remount,rw /system
chmod 0755 /system/app/Shafa1.apk
chmod 0644 /system/app/PackageInstaller.apk
```
Set proper permissions for the apps.
```bash
am start com.shafa.tvlauncher
```
Launch the Sofa Butler desktop.
```bash
cp Shafa2.apk /data/app
```
Copy the second APK to the data app directory.
```bash
reboot
```
Reboot the device.
**Step 6: Start the Sofa Butler Application**
After rebooting, open the Sofa Butler desktop. If the command prompt shows an error, try re-running the commands or re-copying the APKs. If the app doesn’t launch, repeat the copy process and restart.
This guide provides a detailed and user-friendly approach to installing third-party apps on the Kyushu PTV8508 set-top box using a USB drive and terminal commands. Make sure all steps are followed carefully to avoid errors.
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