# MacRay-ToF Remote Device Configuration

URL: https://www.macnman.com/docs/lorawan/sensors-lorawan/macray-tof-v1/macsync-lwt1-remote-configuration
Section: User Manual › Lorawan › Sensors Lorawan › Macray Tof V1

## Updating Device Heartbeat

#### Example payload (JSON): 

```json
{ 
"txTime": 60
}
```
**Use FPort = 06 & Times in seconds:**

<div class="faint-line"></div>

## Related Resources

- Datasheet: [MacRay LToF LoRaWAN Time-of-Flight sensor datasheet](/product/lorawan/sensors/level-sensors/macray-ltof-lorawan-time-of-flight-sensor)
- Start of this manual: [MacRay-ToF Introduction](/lorawan/sensors-lorawan/macray-tof-v1/macsyncls_introduction)
- Setup shared by all sensors: [Common LoRaWAN sensor settings](/lorawan/sensors-lorawan/common-lorawan-settings/maya_configuration_led_status_common)
- Help: [Contact Macnman support](/help/help)