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drohm / pi-sht1x

Python library for the Sensirion SHT1x series of temperature and humidity sensors to work on the Raspberry Pi. This includes the SHT10, SHT11, and SHT15 sensors.
MIT License
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SHT1X failed to properly receive command [['WriteStatusRegister'] - 00000110] #17

Closed stevec-sm closed 2 years ago

stevec-sm commented 3 years ago

I tried to run the example.py, it worked well at the beginning, but suddenly facing the error SHT1X failed to properly receive command [['WriteStatusRegister'] - 00000110], and stopped working. the log file shows

Data Pin: 18
Clock Pin: 23
GPIO mode: GPIO.BCM
Vdd: 3.5
Resolution: High
Heater: False
OTP no reload: False
CRC check: True
[2021-05-28 12:21:50,507]        sht1x:    _get_ack:393  INFO      Command ['Temperature'] [00000011] acknowledged: 3
[2021-05-28 12:21:50,508]        sht1x:_send_command:258  INFO      SHT1x is taking measurement.
[2021-05-28 12:21:50,509]        sht1x:_send_command:261  ERROR     SHT1x is not in the proper measurement state: DATA line is LOW.
[2021-05-28 12:21:50,509]        sht1x:    __exit__:91   INFO      GPIO channel function status:
Data pin [18]: GPIO.IN
Clock pin [23]: GPIO.OUT
[2021-05-28 12:21:50,510]        sht1x:    __exit__:94   ERROR     Exception in with block: <class 'pi_sht1x.sht1x.SHT1xError'>
SHT1x is not in the proper measurement state: DATA line is LOW.
<traceback object at 0x75ab71e8>
[2021-05-28 12:24:18,809]        sht1x:initialize_sensor:156  INFO      Initializing sensor using bit mask: 00000000
[2021-05-28 12:24:18,811]        sht1x:    _get_ack:393  INFO      Command ['WriteStatusRegister'] [00000110] acknowledged: 6
[2021-05-28 12:24:18,812]        sht1x:    _get_ack:396  ERROR     SHT1x failed to properly receive command [['WriteStatusRegister'] - 00000110]
[2021-05-28 12:24:24,530]        sht1x:initialize_sensor:156  INFO      Initializing sensor using bit mask: 00000000
[2021-05-28 12:24:24,532]        sht1x:    _get_ack:393  INFO      Command ['WriteStatusRegister'] [00000110] acknowledged: 6
[2021-05-28 12:24:24,533]        sht1x:    _get_ack:396  ERROR     SHT1x failed to properly receive command [['WriteStatusRegister'] - 00000110]
[2021-05-28 12:27:37,874]        sht1x:initialize_sensor:156  INFO      Initializing sensor using bit mask: 00000000
[2021-05-28 12:27:37,877]        sht1x:    _get_ack:393  INFO      Command ['WriteStatusRegister'] [00000110] acknowledged: 6
[2021-05-28 12:27:37,878]        sht1x:    _get_ack:396  ERROR     SHT1x failed to properly receive command [['WriteStatusRegister'] - 00000110]
[2021-05-28 12:28:29,742]        sht1x:initialize_sensor:156  INFO      Initializing sensor using bit mask: 00000000
[2021-05-28 12:28:29,744]        sht1x:    _get_ack:393  INFO      Command ['WriteStatusRegister'] [00000110] acknowledged: 6
[2021-05-28 12:28:29,745]        sht1x:    _get_ack:396  ERROR     SHT1x failed to properly receive command [['WriteStatusRegister'] - 00000110]
[2021-05-28 12:37:16,251]        sht1x:initialize_sensor:156  INFO      Initializing sensor using bit mask: 00000000
[2021-05-28 12:37:16,258]        sht1x:    _get_ack:393  INFO      Command ['WriteStatusRegister'] [00000110] acknowledged: 6
[2021-05-28 12:37:16,259]        sht1x:    _get_ack:396  ERROR     SHT1x failed to properly receive command [['WriteStatusRegister'] - 00000110]
[2021-05-28 12:37:56,645]        sht1x:initialize_sensor:156  INFO      Initializing sensor using bit mask: 00000000
[2021-05-28 12:37:56,648]        sht1x:    _get_ack:393  INFO      Command ['WriteStatusRegister'] [00000110] acknowledged: 6
[2021-05-28 12:37:56,649]        sht1x:    _get_ack:396  ERROR     SHT1x failed to properly receive command [['WriteStatusRegister'] - 00000110]

I'd like to know how to fix this issue.

pinpang commented 3 years ago

IMPORTANT: [2021-05-28 12:21:50,509] sht1x:_send_command:261 ERROR SHT1x is not in the proper measurement state: DATA line is LOW. It seems that your data pin lacks fixed pull-up.

I updated the code to use internal pull-up, you can find it at this FORK.

drohm commented 3 years ago

Thanks @pinpang for this. I merged this into master and will have a new build out shortly.

drohm commented 3 years ago

@stevec-sm @pinpang New release has been published. Please let me know if @pinpang's fix corrects this issue.