Reading beacons TxPower by WiPy V3.1

[momentaj]

Hi,

I am playing with WiPy V3.1 to read advertising data sent. I have some BLE beacons (Ruuvi, Kontakt, Estimote, ...) in my lab and I am getting the MAC, RSSI, AdvData, ... for them.

Everything seems OK except TxPower: I can see the TxPower for all the beacons in my cellphone. But, the code below always prints 'None'.

from network import Bluetooth
from ucollections import namedtuple
import ubinascii

TagData = namedtuple('TagData', (
    'mac',
    'addr_type',
    'adv_type',
    'rssi',
    'tx_power',
    'data',
    'name',
    'data_array'
))

encoding = "ascii"
bluetooth = Bluetooth()
bluetooth.deinit()
bluetooth.init()
bluetooth.start_scan(2)

tags = []

while bluetooth.isscanning():

    adv = bluetooth.get_adv()
    if not adv:
        continue

    mac = ubinascii.hexlify(adv.mac, ':').decode(encoding)

    name_b = bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL)
    if name_b:
        name = str(name_b, encoding)
    else:
        name = ''

    data_array = []
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_TX_PWR))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_FLAG))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_16SRV_PART))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_T16SRV_CMPL))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_32SRV_PART))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_32SRV_CMPL))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_128SRV_PART))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_128SRV_CMPL))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_SHORT))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_NAME_CMPL))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_DEV_CLASS))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_SERVICE_DATA))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_APPEARANCE))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_ADV_INT))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_32SERVICE_DATA))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_128SERVICE_DATA))
    data_array.append(bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_MANUFACTURER_DATA))


    tag = TagData(mac, adv.addr_type, adv.adv_type, adv.rssi, bluetooth.resolve_adv_data(adv.data, Bluetooth.ADV_TX_PWR), adv.data, name, data_array)
    tags.append(tag)

for tag in tags:
    print(tag.data_array[0])

I want to read Bluetooth.ADV_TX_PWR value for each advertising data.

Am I missing something?

Thanks