set sound speed

[BenoitURRUTY]

Hi

i try to set the speed of the sound but it's not working.

from brping import Ping1D

# ---------- Configuration ----------
PORT = "/dev/serial0"
BAUDRATE = 115200
SOUND_SPEED_MS = 1447  # à adapter à ton milieu

# -----------------------------------

# Timestamp à l'initialisation
start_time = datetime.now()
FILENAME = f"ping_depth_{start_time.strftime('%Y%m%d_%H%M%S')}.csv"

myPing = Ping1D()
myPing.connect_serial(PORT, BAUDRATE)
rg = myPing.get_profile()
print(f"get_profile: {rg}")

# Conversion en mm/s pour Ping1D
SOUND_SPEED_MM_S = 1450000  # exemple

ok = myPing.set_speed_of_sound(SOUND_SPEED_MM_S)
print(ok)


res = myPing.get_speed_of_sound()
print(res)

when i run my code I receive this issue

styx4d@Echosondeur:~/Documents $ python Pind1D_only.py 
Opening /dev/serial0 at 115200 bps
get_profile: {'distance': 4449, 'confidence': 0, 'transmit_duration': 191, 'ping_number': 45983, 'scan_start': 0, 'scan_length': 6782, 'gain_setting': 6, 'profile_data': b'\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfd\xfdH\x0f,\x90w%\x05\x15@-\x12\x02\x03\x06\x07\t\x06\x02\x01\x02\x00\x00\x01\x03\x04\x01\x00\x01\x00\x00\x00\x00\x01\x01\x00\x00\x03\x06\x06\x01\x01\x00\x00\x00\x00\x00\x01\x05\x03\x00\x00\x00\x00\x01\x00\x00\x00\x01\x01\x00\x00\x01\x04\x00\x00\x00\x01\x02\x00\x02\x01\x00\x00\x00\x00\x03\x06\x08\x07\t\x04\x03\x01\x00\x00\x00\x01\x02\x03\t\n\x10\x0b\x03\x02\x00\x00\x03\x04\x01\x01\x00\x00\x03\x04\x04\x05\x01\x00\x00\x00\x02\x05\x07\x04\x03\x00\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00%\x00\x00\x00\x00\x1f\xffu\x8a\x906\x1e`\x19\x00fF\x17\x00\x1b+\x1f"\x00..~\xed\xfd\x02g\x14\x00(g^P&QN '}
Traceback (most recent call last):
  File "/home/styx4d/Documents/Pind1D_only.py", line 26, in <module>
    ok = myPing.set_speed_of_sound(SOUND_SPEED_MM_S)
  File "/home/styx4d/.local/lib/python3.13/site-packages/bluerobotics_ping-0.2.3-py3.13.egg/brping/ping1d.py", line 520, in set_speed_of_sound
    and (self._speed_of_sound != speed_of_sound)):
         ^^^^^^^^^^^^^^^^^^^^
AttributeError: 'Ping1D' object has no attribute '_speed_of_sound'. Did you mean: 'get_speed_of_sound'?

Thanks for your help

[RaulTrombin]

Hi @BenoitURRUTY, I quickly tested here over Jupyter BlueOS extension:

Can you give more details on the Python version and pip requirements output?

[BenoitURRUTY]

Hi

thanks for testing my code. So it's seems to work fine.

I running this code on Raspberry with

• Debian 13.3 (trixie)
• Python 3.13.5,
• pip 25.1.1 from /usr/lib/python3/dist-packages/pip (python 3.13),

list of my package

Package Version

---

apt-listchanges 4.8
arrow 1.3.0
asgiref 3.8.1
astroid 3.3.8
asttokens 3.0.0
attrs 25.3.0
autocommand 2.2.2
av 14.2.0
babel 2.17.0
bcrypt 4.2.0
beautifulsoup4 4.13.4
blinker 1.9.0
bluerobotics-ping 0.2.3
Brotli 1.1.0
certifi 2025.1.31
chardet 5.2.0
charset-normalizer 3.4.2
click 8.1.8
cloud-init 25.2
colorzero 2.0
configobj 5.0.9
contourpy 1.3.1
cryptography 43.0.0
cssselect 1.3.0
cupshelpers 1.0
cycler 0.12.1
dbus-python 1.4.0
decorator 5.2.1
dill 0.4.0
distro 1.9.0
docutils 0.21.2
Flask 3.1.1
fonttools 4.57.0
fqdn 1.5.1
freetype-py 2.5.1
fs 2.4.16
future 1.0.0
gpiod 2.2.0
gpiozero 2.0.1
gps 3.25
html5lib-modern 1.2
idna 3.10
inflect 7.3.1
isoduration 20.11.0
isort 6.0.1
itsdangerous 2.2.0
jaraco.context 6.0.1
jaraco.functools 4.1.0
jaraco.text 4.0.0
jedi 0.19.1
Jinja2 3.1.6
jsonpatch 1.32
jsonpointer 2.4
jsonschema 4.19.2
jsonschema-specifications 2023.12.1
kiwisolver 1.4.7
lgpio 0.2.2.0
libarchive-c 5.1
libevdev 0.11
linkify-it-py 2.0.3
logilab-common 2.1.0
lxml 5.4.0
lz4 4.4.0+dfsg
markdown-it-py 3.0.0
MarkupSafe 2.1.5
matplotlib 3.10.1+dfsg1
mccabe 0.7.0
mdurl 0.1.2
meson 1.7.0
more-itertools 10.7.0
mpmath 1.3.0
mypy 1.15.0
mypy-extensions 1.0.0
netifaces 0.11.0
ntplib 0.3.3
numpy 2.2.4
oauthlib 3.2.2
olefile 0.47
OpenEXR 1.3.10
orjson 3.10.7
packaging 25.0
parso 0.8.4
pexpect 4.9.0
pgzero 1.2.1
picamera2 0.3.33
pidng 4.0.9
piexif 1.1.3
pillow 11.1.0
pip 25.1.1
platformdirs 4.3.7
pooch 1.8.2
psutil 7.0.0
ptyprocess 0.7.0
pyasyncore 1.0.2
pycairo 1.27.0
pycryptodomex 3.20.0
pycups 2.0.4
pygame 2.6.1
Pygments 2.18.0
PyGObject 3.50.0
pyinotify 0.9.6
PyJWT 2.10.1
pylint 3.3.4
PyOpenGL 3.1.9
pyOpenSSL 25.0.0
pyparsing 3.1.2
pyproj 3.7.1
PyQt5 5.15.11
PyQt5_sip 12.17.0
pyserial 3.5
pysmbc 1.0.25.1
python-apt 3.0.0
python-dateutil 2.9.0
python-dotenv 1.0.1
python-prctl 1.8.1
pyudev 0.24.3
PyYAML 6.0.2
referencing 0.36.2
reportlab 4.3.1
requests 2.32.3
rfc3339-validator 0.1.4
rfc3986-validator 0.1.1
rfc3987 1.3.8
rich 13.9.4
rlPyCairo 0.3.0
roman 5.0
rpds-py 0.21.0
rpi-keyboard-config 1.0
rpi-lgpio 0.6
RTIMULib 7.2.1
scipy 1.15.3
Send2Trash 1.8.3
sense-hat 2.6.0
setuptools 78.1.1
simplejpeg 1.8.1
smbus 1.1
smbus2 0.4.3
soupsieve 2.7
spidev 3.6
ssh-import-id 5.10
sympy 1.13.3
thonny 4.1.7
tomlkit 0.13.2
tqdm 4.67.1
typeguard 4.4.2
types-aiofiles 24.1
types-antlr4-python3-runtime 4.13
types-assertpy 1.1
types-atheris 2.3
types-aws-xray-sdk 2.14
types-beautifulsoup4 4.12
types-bleach 6.2
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types-cffi 1.16
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types-greenlet 3.1
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types-html5lib 1.1
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