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.