levelmetering-preprocessor/docs/decoding.txt

Ultraschall - LDDS75

http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/


Value, Size (bytes)
Battery (mV), 2
Distance (mm), 2
Interrupt, 1
Temperature, 2
Status, 1


import base64
import struct

payload = 'DQYCjAAAAAE='
frame = base64.b64decode(payload)

battery = struct.unpack('>H', frame[0:2])[0]
distance = struct.unpack('>H', frame[2:4])[0]
status = struct.unpack('?', frame[7:8])[0]

print(f"{battery=}, {distance=}, {status=}")

payload = 'DRgAAAAAAAE='




Radar - LMDS200

http://wiki.dragino.com/xwiki/bin/view/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LMDS200%20-%20LoRaWAN%20Microwave%20Radar%20Distance%20%20Sensor%20User%20Manual/


Value, Size (bytes), FPORT = 2
Battery (mV), 2
Distance 1 (cm), 2
Distance 2 (cm), 2
Status, 1


import base64
import struct

payload = 'DN4AqQD8AA=='
frame = base64.b64decode(payload)

battery = struct.unpack('>H', frame[0:2])[0]
distance1 = struct.unpack('>H', frame[2:4])[0]
distance2 = struct.unpack('>H', frame[4:6])[0]

print(f"{battery=}, {distance1=}, {distance2=}")