HWT905 RS-485 sensor return None values only

[jalpa91]

Hi,

I am new to sensors.
Hardware : ubuntu 20 , HWT905 RS485 ,python3

Successfully install witmotion and After using python API I tried to run a very basic python program and I always get None value only.
could you please help me out with how to get raw data from the sensor?

sample code

from witmotion import IMU

def callback(msg):
print('msg',msg)
print(msg.get_angle())

print(msg.get_acceleration())

imu = IMU()
#imu.subscribe(callback)
imu.get_quaternion()
print(imu.get_angle())
print(imu.get_acceleration())

print(imu.get_quaternion())

#Output of the program :
python3 gps_sensor_test.py

(None, None, None)
None
None

[jpeg2600]

@jalpa91 have you managed to get it to work ? I'm wondering if the library works with RS485 sensors

[Sumpy1]

Hey, I am using HWT905-TTL sensor but it just outputs 'None' when I try to output data through polling interface.
Data does print when I used callback but it does not print timestamp and gives angular_velocity data as null.
Also when I try to save the data collected from callback, it will save nothing. Any updates on this topic will be helpful.

[TheNewRobot]

Does anyone have an update for this problem? I have the exact same problem as sumpy1.