Use this kind of protocol:

required:
N = node ID
C = counter
optional:
B = battery
T = temperature
H = humidity
PR = pressure
P = PIR state
R = rain state

Example:

N4,T=21.4,H=56.2,PR=1008.3,B=3.01,C=9


FULL LIST

# Core / Environmental
T   = Temperature (°C)
H   = Humidity (%)
PR  = Pressure (hPa)
CO2 = CO2 (ppm)
VOC = Air Quality / VOC
AQ  = Air Quality Index

# Light
L   = Light level (lux)
UV  = UV index

# Motion / Security
P   = PIR motion (0/1)
D   = Door / window contact (0/1)
VIB = Vibration / tamper (0/1)

# Weather
R   = Rain (0/1)
RA  = Rain amount (mm)
WS  = Wind speed
WD  = Wind direction (degrees)

# Power / Energy
V   = Voltage (V)
I   = Current (A)
W   = Power (W)
E   = Energy (kWh)

# Soil / Garden
SM  = Soil moisture (%)
ST  = Soil temperature (°C)
WL  = Water level

# Device / Health
B   = Battery voltage (V)
C   = Counter
UP  = Uptime (seconds)

# Safety
SMK = Smoke (0/1)
FL  = Flame (0/1)
GAS = Gas level
LEAK= Water leak (0/1)

# Optional / Future
DB  = Sound level (dB)
ERR = Error code
FW  = Firmware version