Device Wi-Fi hotspot is not visible
1. Reduce interference
Use a USB extension cord to position the device away from objects that can block or interfere with Wi-Fi signals, such as:
USB hubs or micro PCs
Large appliances like TVs or refrigerators
2. Refresh your Wi-Fi list
Sometimes the network list does not update automatically. Try:
Turning Wi-Fi OFF and ON
Reopening or refreshing the Wi-Fi list
3. If the hotspot is still not appearing, pry open the back lid with a small flat screwdriver. After opening it, you should see the Wi-Fi antenna connector. Carefully detach the connector, then attach it back. Make sure the connector does not press any of the nearby buttons. Otherwise, it can prevent the MCU from booting. Power the device without putting the lid on and check if the hotspot appears. If it does, carefully fold the antenna wire and snap the lid closed.
Is there a way to factory reset the preflashed firmware on the MCU?
Currently, factory reset behavior depends on the firmware version installed on your device:
Firmware v1.2 or newer (preflashed):
You can perform a factory reset directly from the Home Assistant UI.Older firmware versions:
A factory reset is not supported. You will need to manually reflash the device.
To reflash the device, please follow this guide:
https://www.akamatis.com/setup/advanced-setup
Cannot find the YAML configuration for the sensors.
Please use the YAML Configurator
Radar sensor is too sensitive, not sensitive enough, or reports false positives.
If your sensor is based on the LD2401 or LD2410, please follow the Auto-calibration guide.
After changing the configuration, all sensor values appear as ‘unknown’ in Home Assistant.
Possible Cause:
Keeping Engineering Mode enabled for an extended period can overload the UART bus. This may cause the LD2410 sensor to stop outputting valid data or produce incorrect readings.
Use Engineering Mode only temporarily for testing or fine tuning the sensor.
After completing tests, disable Engineering Mode to prevent UART congestion and ensure stable sensor operation.
Factory reset the sensor:
Install the HLKRadarTool app on your phone and connect to the radar via Bluetooth.
Tap the "Initialize" button (its name may be a little confusing) to reset the radar and restart the device.
If values still show "unknown", unplug the device for 3 seconds and plug it back in. Give Home Assistant a moment to update.
Note: If you notice that Engineering Mode turns off on its own, this is normal. In firmware v1.2 and newer, it is automatically disabled after 1 hour.
The device keeps reporting a serial parsing error: “Max command length exceeded”.
This issue is usually caused by incorrect YAML configuration. Please make sure you select the correct MCU when generating the configuration file:
After updating the LD2450 (Skopos) firmware to version 2.14, all sensor values appear as “unknown” in Home Assistant.
Connect to the LD2450 sensor using HLKRadarTool via Bluetooth.
Set the Baud rate to 256000.
I positioned the Skopos sensor as recommended, but HLKRadarTool app shows the target’s coordinates as reflected or mirrored.
Please ignore this behavior. If you followed our setup manual for configuring the sensor and zones, this issue will not appear in Home Assistant. No additional action is required. The reason HLKRadarTool app shows mirrored coordinates is currently unknown.