Get the data from the BLE advertisements

[jcea]

Please, support getting the data from the periodic (in my device every 2.5 seconds) advertisements, instead of establishing a BT connection, to keep battery usage low.

[uduncanu]

I'm struggling to find any information about the broadcast data, although I can seem some sources saying that it may be encrypted (which isn't something I've had to deal with so far). Are you aware of any more information about it anywhere?

[afer92]

View lywsd03mmc fork. With AtcMiThermometerClient you can retrieve thermometers data without connecting. Limitations : can't get firmware and hardware revisions, can't get history.

from lywsd03mmc import AtcMiThermometerClient
# AtcMiThermometerClient(scan_for=15.0, retry=3, debug=False)
client = AtcMiThermometerClient()

client.get_datas()

for thermometer in client.thermometers:
    print('----\n', thermometer) # print all data `)

Result:

Discovered device a4:c1:38:xx:xx:xx
Discovered device a4:c1:38:yy:yy:yy
Device disconnected
Proceed...
Discovered device a4:c1:38:xx:xx:xx
Discovered device a4:c1:38:yy:yy:yy
Received new data from a4:c1:38:xx:xx:xx
----
 mac:   A4:C1:38:xx:xx:xx - ATC_xxxxxx
temp:   22.8 °C
hum:    37 %
batt:   86 %
volts:  2.98 V
rssi:   -54 dB
skip:   False
----
 mac:   A4:C1:38:yy:yy:yy - ATC_yyyyyy
temp:   21.7 °C
hum:    42 %
batt:   88 %
volts:  2.996 V
rssi:   -71 dB
skip:   False

[jcea]

This is nice, @afer92, but it requires a modified firmware.

[afer92]

This is nice, @afer92, but it requires a modified firmware.

Indeed. The interest of the modified firmware is to preserve the battery. The draw back is the lack of history. To choose is to renounce.

[arizzi]

https://esphome.io/components/sensor/xiaomi_ble.html#obtaining-the-bindkey

[afer92]

I will have a look, it's a good idea. I use advertissements for miflora sensors (sea device-mqtt.