LD2420 Firmware?

ESPHome
1

Just received an LD2420 from Ali…
from what i read from ESPHOME there can be two installation methods depending on the FW of the device (FW 1.5.3 or 1.5.4 or greater). My question is: how do i know what FW the device has?

((on LD2420 I can only read V2.1)

ESPHOME about LD2420:

“Depending on the firmware you have serial baudrates will be 256000 for any module with less than firmware v1.5.3 and 115200 on newer versions. The tx_pin changed from ot2 to ot1 with firmware v1.5.3. Firmware v1.5.4 and up now features the ability to observe gate energy signal levels and with this release we can dynamically calibrate gate still and move thresholds”

Thanks

2

First lines of documentation gives this to get the fw on text sensor.

# Example configuration entry
ld2420:

text_sensor:
  - platform: ld2420
    fw_version:
      name: LD2420 Firmware
1 Like
3

easy… but…
I should know which is the FW before flash it…
How do I know where to connect the pins and have a baudrate if I don’t know what the FW is?

4

There are only two options for pins /bauds , Firmware <1.5.3 and >=1.5.3. You need to try which one.

5

How to flash this device at all, since it doesn’t have BT (if i remember correct)? I’ve searched for (official) windows app, but no luck…