OpenGarage Forums Hardware Questions Distance readings only periodically correct

This topic contains 8 replies, has 3 voices, and was last updated by  Ray 4 weeks, 1 day ago.

Viewing 9 posts - 1 through 9 (of 9 total)
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  • #1231

    tazUk
    Participant

    I’m running two OpenGarage devices, bought months apart, with identical configurations on v1.0.8 and integrated into my Homeassistant setup purely to detect car presence in a double garage.

    Configuration:
    Ceiling Mount
    Door Threshold 0
    Vehicle Threshold 150
    Read Intervals 120

    Over a period of time my first OpenGarage distance has become totally inaccurate, although the second one reports accurate distances.

    Expected readings:
    1. With car, 72-75 cm
    2. Without car, 223-225 cm

    Symptoms:
    1. Very occasional reading (without car): 450cm
    2. Very occasional reading (with car): 74cm
    3. Usual reading (approx. 80% of the time): 3-5cm

    I’ve tried to resolve this behaviour with the following checks / tests:
    1. Cleaned sensor and checked alignment.
    2. Reset configuration and re-configured
    3. Replaced USB power cable
    4. Replaced USB power supply
    5. Used a more powerful USB supply (now supplying 2.4a per port).

    I’ve also tried to re-upload the firmware via the UI, as well as downgrade via the UI – both failed.

    I’d appreciate any advice at this point.

    #1232

    tazUk
    Participant

    Now consistently reads 3-5cm.

    I’d really appreciate some advice at this point as essentially this unit (of my two) is now useless for the purpose I purchased it for.

    #1239

    Ray
    Keymaster

    I suggest that you submit a support ticket to get a replacement.

    #1242

    tazUk
    Participant

    I’ve now been able to resolve the issue – the problem has not reappeared for the past 12 days after I dismantled it and refitted the case.
    I can only assume that something shifted inside the case over a period of time after originally mounting it.

    #1564

    mshale
    Participant

    I know this is an old post, but it fits my issue as well. My sensor started reading 5 cm overnight. I installed it last night and this morning the sensors are reading 5 cm, and nothing I do fixes the issue. What else can I try? Id like to use the built-in distance sensors instead of external switches, but will run a wire if needed.

    More testing.
    Removing the clear cover solves the issue. I can set the cover over and align the hold or the sensors, but not seat the cover on its tabs and I have no issues. Seems like this only happens when it’s up to operating temp in the garage.

    Photo of the raised lid:

    View post on imgur.com

    Photo of fully seated lid:

    View post on imgur.com

    • This reply was modified 1 month, 1 week ago by  mshale.
    • This reply was modified 1 month, 1 week ago by  mshale. Reason: Added photos and more info
    #1567

    mshale
    Participant

    So far, I’ve been able to fix the unit by accident. I found that if the case lid was offset, the issue went away. So I wedged some foam in the end closest to the sensor, and the problem hasn’t reoccurred.

    View post on imgur.com

    View post on imgur.com

    View post on imgur.com

    #1575

    Ray
    Keymaster

    OK that’s really strange but interesting to know. I would think that raising the lid should cause problems for the sensor as it’s more likely to be partially occluded. What happens if you completely remove the lid, is the problem gone or still there?

    #1576

    mshale
    Participant

    Thanks for responding Ray. I love this implementation, and hope to use it to its potential.

    I’ve been testing more on this thing, and hove found that the modifications I made earlier worked for about a day. It seems to be strictly temperature related. I have now completely removed all of the covering, and I still get the 5-3 cm measurements from the sensors.
    Here are some temp measurements:
    Temp at ceiling mount point: 31 degrees C
    Temp on wifi chip: 35 degrees C
    Temp outside: 26 degrees C

    #1578

    Ray
    Keymaster

    OK. Sounds like the distance sensor is still having a problem. If you want you can submit a support ticket and arrange for a replacement. In the next batch we will try some different distance sensors to see if that makes any difference.

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OpenGarage Forums Hardware Questions Distance readings only periodically correct