I updated the firmware on 2 of my LD2451 modules.
Now, they no longer work. Only the blue light blinks, and there is no reading of approach or distancing objects.
A refresh of the firmware update did no resolve the problem.
I tried a serial port connection and the problem continues.
The reading of the device in the HLK raday stays at 09:00:00 all the time.
How can I go back to an older firmware?
I got an answer from technical support.
I used the firmware code FVTAWN to go back to firmware 24072217. I could not connect to the LD2451 with Bluetooth.
After connecting with the CH340 and set the configuration command ( FD FC FB FA 04 00 FF 00 01 00 04 03 02 01),
I needed to do the restart command :
FD FC FB FA 02 00 A3 00 04 03 02 01
The module will restart and connect to the HLK Radar Tool. (no blue LED blinking)
