High sunlight sensor values using SI1145 and GroveWeatherPi

jrm964
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Posts: 24

High sunlight sensor values using SI1145 and GroveWeatherPi Jan 22, 2021 9:40:26 GMT -8

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Post by jrm964 on Jan 22, 2021 9:40:26 GMT -8

Hello, I've struggling with the UV SI1145 sensor on my groveweatherPi station. I'm getting very high values. The sunlight value in my conflocal.py is set to outdoor. Anyone experience this?

Values seen in log:

VISdata = [255, 255]

IRdata = [255, 255]

UVdata = [158, 136]

Database rows in the sunlight table:

+----+-----------------------+---------+---------+------+---------+

| ID | TimeStamp | Visible | IR | UV | UVIndex |

+----+-----------------------+---------+---------+------+---------+

| 4688 | 2021-01-19 21:35:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4689 | 2021-01-19 21:40:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4690 | 2021-01-19 21:45:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4691 | 2021-01-19 21:50:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4692 | 2021-01-19 21:55:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4693 | 2021-01-19 22:00:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4694 | 2021-01-19 22:05:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4695 | 2021-01-19 22:10:46 | 2675245 | 1337745 | 3497 | 34.97 |

| 4696 | 2021-01-19 22:15:46 | 652540 | 1337745 | 853 | 8.53 |

| 4697 | 2021-01-19 22:20:46 | 397377 | 1337745 | 519 | 5.19 |

| 4698 | 2021-01-19 22:25:46 | 346106 | 1337745 | 452 | 4.52 |

| 4699 | 2021-01-19 22:30:46 | 279467 | 1337745 | 365 | 3.65 |

| 4700 | 2021-01-19 22:35:46 | 239467 | 1337745 | 313 | 3.13 |

| 4701 | 2021-01-19 22:40:46 | 187622 | 965799 | 245 | 2.45 |

| 4702 | 2021-01-19 22:45:46 | 154139 | 870204 | 201 | 2.01 |

| 4703 | 2021-01-19 22:50:46 | 101147 | 549897 | 132 | 1.32 |

| 4704 | 2021-01-19 22:55:46 | 58237 | 293852 | 76 | 0.76 |

| 4705 | 2021-01-19 23:00:46 | 42049 | 278094 | 55 | 0.55 |

| 4706 | 2021-01-19 23:05:46 | 28442 | 284754 | 37 | 0.37 |

| 4707 | 2021-01-19 23:10:46 | 13032 | 170512 | 17 | 0.17 |

| 4708 | 2021-01-19 23:15:46 | 3442 | 38196 | 4 | 0.04 |

| 4709 | 2021-01-19 23:20:46 | 1106 | 5881 | 1 | 0.01 |

SDL Global Moderator Posts: 5,655 Raspberry Pi: Yes Other Device: PC, arduino, beagleBone	High sunlight sensor values using SI1145 and GroveWeatherPi Jan 22, 2021 15:20:39 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by SDL on Jan 22, 2021 15:20:39 GMT -8 Hmm. Looks like you are maxing out during the day. Try reducing the gain on the SI1145. BP

jrm964 New Member Posts: 24	High sunlight sensor values using SI1145 and GroveWeatherPi Jan 25, 2021 8:45:38 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by jrm964 on Jan 25, 2021 8:45:38 GMT -8 Are there any instructions you can provide to reduce the gain? I can't find any documentation on reducing this.

SDL Global Moderator Posts: 5,655 Raspberry Pi: Yes Other Device: PC, arduino, beagleBone	High sunlight sensor values using SI1145 and GroveWeatherPi Jan 26, 2021 10:11:40 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by SDL on Jan 26, 2021 10:11:40 GMT -8 Look in the SI1145 specification. You may have to change the SI1145 driver and/or setup. BP

jrm964
New Member

Posts: 24

High sunlight sensor values using SI1145 and GroveWeatherPi Jan 26, 2021 13:34:23 GMT -8

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Post by jrm964 on Jan 26, 2021 13:34:23 GMT -8

Thanks BP. I think I figured out what the issue was. Inside the SDL_Pi_SI1145.py, the indoor= variable was hardcoded to '1'. I changed it to '0'. It's doesn't seem to be using the setting in the conflocal.py.

SDL Global Moderator Posts: 5,655 Raspberry Pi: Yes Other Device: PC, arduino, beagleBone	High sunlight sensor values using SI1145 and GroveWeatherPi Jan 29, 2021 10:22:40 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by SDL on Jan 29, 2021 10:22:40 GMT -8 Excellent. Glad you figured it out! BP

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High sunlight sensor values using SI1145 and GroveWeatherPi

Post by jrm964 on Jan 22, 2021 9:40:26 GMT -8

Post by SDL on Jan 22, 2021 15:20:39 GMT -8

Post by jrm964 on Jan 25, 2021 8:45:38 GMT -8

Post by SDL on Jan 26, 2021 10:11:40 GMT -8

Post by jrm964 on Jan 26, 2021 13:34:23 GMT -8

Post by SDL on Jan 29, 2021 10:22:40 GMT -8

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