# Bluetooth connection

> Source: https://topodrone.com/knowledge/topodrone-slam-100/bluetooth-connection/
> Section: TOPODRONE SLAM 100
> Updated: 2026-10-02

| Before connecting to S-RTK100, switch on Bluetooth on the mobile phone. Open the SLAM GO APP, connect to SLAM100 and enter standby mode. Go to SETTINGS \> GENERAL SETTINGS \> S-RTK100 SETTINGS and select the required S-RTK100 Bluetooth device in the pop-up window to connect.   After S-RTK100 is connected to SLAM100:   1. Make sure S-RTK100 is switched on in an open area with GNSS signal;   2. After power-on, automatic initialization (time calibration and satellite search) takes about 5 minutes;   3. TOPODRONE SLAM100 can work normally after the GNSS indicator blinks green or stays on.   Note   1. Use the S-RTK100 satellite receiver in the frequency range permitted by local radio regulations, and follow local radio laws and regulations;   2. Do not disassemble the S-RTK100 antenna;   3. When using and placing S-RTK100, make sure it is vertical to the ground (antenna up);   4. Avoid using S-RTK100 near obstacles or radio interference;   5. Avoid blocking the antenna when using S-RTK100;   6. Do not let liquids such as water or oil get inside;   7. Avoid electric discharges and lightning. | ![Bluetooth connection](https://topodrone.com/knowledge/i/903ab88ecbf00f2a.png) |
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