P1Q Wifi packet format¶

Units of measurement¶

```

define UNIT_TYPE_C 0 /*< C = celsius /¶

define UNIT_TYPE_PA 1 /*< Pa = pascal /¶

define UNIT_TYPE_KPA 2 /*< kPa = kilopascal /¶

define UNIT_TYPE_MPA 3 /*< MPa = megapascal /¶

```

Example parser¶

Python3¶

``` python

!/usr/bin/env python3¶

from pprint import pprint import struct

def parse(packet): d = {} by = bytes(packet)

# device serial number - as notes on device label
d["device_serial"] = struct.unpack("<I", by[0:4])[0]

# unit of measurement that follows
# 2 = kPa = kilopascal
d["unit"] = int(by[4])

# minimum value measured between transmit cycles
d["value_mini"] = struct.unpack("<f", by[5:9])[0]
d["value_mini_bytes_12"] = struct.unpack("<h", by[5:7])[0]
d["value_mini_bytes_34"] = struct.unpack("<h", by[7:9])[0]

# maximum value measured between transmit cycles
d["value_maxi"] = struct.unpack("<f", by[9:13])[0]
d["value_maxi_bytes_12"] = struct.unpack("<h", by[9:11])[0]
d["value_maxi_bytes_34"] = struct.unpack("<h", by[11:13])[0]

# average value measured between transmit cycles
d["value_avrg"] = struct.unpack("<f", by[13:17])[0]
d["value_avrg_bytes_12"] = struct.unpack("<h", by[13:15])[0]
d["value_avrg_bytes_34"] = struct.unpack("<h", by[15:17])[0]

# last value measured in transmit cycle
d["value_last"] = struct.unpack("<f", by[17:21])[0]

# battery level as described in https://docs.quorumprecision.com/p1ap-manual/#battery-level-information
d["battery_level"] = int(by[-1])

return d

if name == "main": packets = ("7B00000002608BBDBE608BBDBE608BBDBE608BBDBEE9",) for p in packets: print("Parsing len: {} (expecting 22 bytes) -> {}".format(int(len(p) / 2), p)) packet = bytes.fromhex(p) parsed_data = parse(packet) pprint(parsed_data)

```

Contacts¶

For support please contact your distributor or manufacturer directly via www.moirelabs.com