Connect LD2420 Presence detection sensor to A8 controller.

[vijjav]

It is working with S3 and S4. Thanks.

Here is my sample ESPHome config.
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captive_portal:
binary_sensor:
## LD2420 Sensor
- platform: ld2420
has_target:
name: Presence

sensor:
## LD 2420
- platform: ld2420
moving_distance:
name : Moving Distance

uart:
id: ld2420_radar
tx_pin: 33 #S4 KC868-A8
rx_pin: 32 #S3 KC868-A8
baud_rate: 115200
parity: NONE
stop_bits: 1

ld2420:

text_sensor:
- platform: ld2420
fw_version:
name: LD2420 Firmware

select:
- platform: ld2420
operating_mode:
name: Operating Mode

number:
- platform: ld2420
presence_timeout:
name: Detection Presence Timeout
min_gate_distance:
name: Detection Gate Minimum
max_gate_distance:
name: Detection Gate Maximum
# See "Number" section below for detail
gate_select:
name: Select Gate to Set
still_threshold:
name: Set Still Threshold Value
move_threshold:
name: Set Move Threshold Value

button:
- platform: ld2420
apply_config:
name: Apply Config
factory_reset:
name: Factory Reset
restart_module:
name: Restart Module
revert_config:
name: Undo Edits