Lamtto RC04: Wireless Carplay & Android Auto User Guide

Device Overview

The Lamtto RC04 is a car accessory designed to bring Apple Carplay and Android Auto functionality to your vehicle's infotainment system. It features a touchscreen display and connects to your smartphone wirelessly.

Interface Ports

The device includes the following connection points:

• AUX Audio Output: For wired audio connection to your car's sound system.
• Rearview Camera (Optional): Input for an optional rearview camera.
• Power Cable: Connects to the vehicle's power source.
• Power / Screen Switch: Controls the device's power and screen status.

Home Page Features

The main interface provides quick access to key functions:

• Carplay: Launches Apple Carplay.
• FM Switch / FM Frequency: Enables the FM transmitter and allows frequency adjustment (default 91.0MHz).
• Android Auto: Launches Google Android Auto.
• Volume Down: Decreases audio volume.
• Volume Up: Increases audio volume.
• Rearview Camera (Optional): Displays the feed from an optional rearview camera.
• Screen Lightness Down: Reduces screen brightness.
• Screen Lightness Up: Increases screen brightness.

Connecting with Apple Carplay

Follow these steps to set up Carplay:

1. Power on the Lamtto RC04 and select the Carplay option.
2. On your iPhone, turn on Bluetooth. Search for and connect to the device named "CAR-KIT-****".
3. Your iPhone will prompt for pairing confirmation and permission. Accept these prompts.
4. After successful pairing, your iPhone will notify you to confirm using Carplay. Confirm this to begin using the Carplay interface.

To stop using Carplay: Simply turn on your phone's WiFi connection.

Carplay Connection Notes:

• For optimal performance, ensure your phone is not connected to other Bluetooth devices in the car.
• The device automatically connects to WiFi after Bluetooth pairing; manual connection is not required.
• The Bluetooth connection will automatically disconnect once Carplay is active.
• If the Carplay screen does not appear, verify iPhone settings: Navigate to Settings > Screen Time > Content & Privacy Restrictions > Allowed Apps > Carplay, and ensure it is enabled. If the issue persists, try disabling, restarting your phone, and then re-enabling the restriction before reconnecting.

Connecting with Android Auto

Follow these steps to set up Android Auto:

1. Power on the Lamtto RC04 and select the Android Auto option. Ensure the "Android Auto" app is installed on your phone.
2. On your Android phone, turn on Bluetooth. Search for and connect to the device named "CAR-KIT-****".
3. Your phone will prompt for pairing confirmation and permission. Accept these prompts.
4. After successful pairing, your phone will automatically connect and use Android Auto with the device.

To stop using Android Auto: Turn on your phone's WiFi connection.

Android Auto Connection Notes:

• Google Pixel phones require Android 8.0 or higher.
• Other Android phones require Android 11 or higher.
• The device automatically connects to WiFi after Bluetooth pairing; manual connection is not required.

FM Transmitter Setup

Use the FM transmitter to broadcast audio through your car's radio:

1. Activate the FM transmission function. The status indicator will change from a red dot [red-dot] (off) to a green dot [green-dot] (on).
2. Use the left and right arrow buttons to select the desired FM frequency (default is 91.0MHz).
3. Tune your car radio to match the selected FM frequency.
4. Audio from Carplay or Android Auto will now play through your car's speakers.
5. To deactivate the FM transmitter, press the button again.

AUX Audio Output

For a direct audio connection, connect an audio cable from the device's AUX audio output to your car's AUX input. This ensures audio from Carplay or Android Auto is played through your car's sound system.

Frequently Asked Questions (FAQ)

Q1: FM transmitter causes noise during car startup. How to fix?

To prevent noise, turn off the FM transmitter before stopping the car. This avoids interference when the car restarts due to unstable output current.

Q2: Carplay has sound issues (frequency bumping/no sound) via FM. What to do?

Avoid using the same frequency as the broadcast. Connecting Carplay via the AUX cable is a recommended alternative to resolve sound issues.

Q3: Why was the camera function removed?

The camera function was removed to enhance the performance and user experience of Carplay on the device.

Q4: How long until my phone auto-connects after initial setup?

Allow 10-20 seconds after connecting to Carplay/Android Auto for the system to automatically sync with your phone.

Q5: What preparation is needed before reconnecting?

Ensure both Bluetooth and WiFi are enabled on your mobile phone before attempting to reconnect for automatic pairing.