UT353BT Decibel Logging via Bluetooth to MQTT/SQLite
- UT353BT Decibel Logger
- Bluetooth
- Python 3.12 or greater
- Poetry
# Linux curl -sSL https://install.python-poetry.org | python3 - # Windows (Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | py -
- Bleak compatible OS (Windows and Linux are fine at least)
$ poetry install$ poetry run python ut353bt.py --help
usage: ut353bt.py [-h] [--wal] [--no-disk-log] [--debug] [--fulldebug] [--interval INTERVAL] [--mac MAC]
options:
--debug enable debug logging
--interval INTERVAL Sleep interval between measurement requests
--mac MAC Only connect to this MAC
--no-disk-log Disable disk logging
--no-mqtt Disable MQTT
$ poetry run python ut353bt.py
2024-03-08 20:13:14 MYPC ut353bt[17008] INFO FOUND: UT353BT (E8:D0:3C:AF:EC:AF)
Env params:
export MQTT_HOST=10.0.0.1$sqlite3 .\ut353bt-e8d03cafe.db .dump
CREATE TABLE timeseries (
id integer primary key,
time integer default (cast(strftime('%s','now') as int)),
decibels REAL
) STRICT;
INSERT INTO timeseries VALUES(1,1709919840,36.700000000000002841);
INSERT INTO timeseries VALUES(2,1709919840,36.600000000000001421);
INSERT INTO timeseries VALUES(3,1709919840,36.5);
...TODO
- Refactor into a library and make MQTT/DB into tools/examples
- Handle custom modes (for example stop logging to prevent failed data)
- Store voltage levels?
- RSSI
- Aggregate data to min/max automatically
--discover- Multi device logging
- https://github.com/Frankkkkk/python-uni-t-ut353-bt
- https://github.com/daweizhangau/esphome_uni_trend_sound_meter
- https://github.com/tigerot/PyQtSoundMeter
| Specifications | UT353BT |
|---|---|
| Noise (A weighting) | 30~130dB |
| Accuracy | ±1.5dB |
| Resolution | 0.1dB |
| Sampling rate | Fast: 125ms |
| Slow: 1000ms | |
| Frequency response | 31.5Hz~8kHz |