RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

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rbono459890
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by rbono459890 »

This is excellent work Magnus!

I am working on a simpler/less expensive version for motorcycles using a single read (not a matrix) device such as MLX90614.

How did you manage to compensate readings for distance?
The MLX90614 sensor has a wide aperture and reliable readings require close proximity in the few centimeters range (while I was hoping to mount the sensor no closer than 10cm).
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Magnus Thomé
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by Magnus Thomé »

Hi!

The MLX90621 doesn't need compensation for distance.

But it would be very easy to use the distance data from the VL53L0X to add that if the MLX90621 was made to use distance compensation.
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rbono459890
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by rbono459890 »

So rather than "compensation for distance", after some more testing it looks like the issue is related only to the MLX90614 sensor aperture: being quite wide, it detects an average temperature, which works for large surfaces but in the case of motorcycle tires it does not.

I am looking at mounting the sensor as close as possible (like some commercial solutions do) but it's at this point much more complicated, especially with the front tire.

Thanks for the tip and inspiration!
rkanaga
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by rkanaga »

Does this work with iPhone's please?

I think that Apple are a bit fussy about allowing any non-approved bluetooth LE devices to connect to IOS?

I would like to build 4 of these and connect them via BLE to my iPhone in addition to the XPS GPS unit I already have and a Go-Pro camera.

Thank you very much for a great software.
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Harry
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by Harry »

rkanaga wrote: Thu Dec 16, 2021 1:53 pm Does this work with iPhone's please?

I think that Apple are a bit fussy about allowing any non-approved bluetooth LE devices to connect to IOS?

I would like to build 4 of these and connect them via BLE to my iPhone in addition to the XPS GPS unit I already have and a Go-Pro camera.

Thank you very much for a great software.
BLE is completely open for iOS devices, Apple is not involved in adding BLE accessories. Approval is required for using BT SPP (and probably other non audio profiles) only.

Tire sensors are a niche and not used a lot, please let us know in case you run into problems.

- Harry
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rkanaga
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by rkanaga »

Thank you, that is good to hear. I've been getting great results with HLT and an XPS GPS-160 + GoPro Hero and want to take it to the next level. My car does not have OBD II sadly so I don't think there is an easy way to add sensors for throttle, brake and steering angle, but the Tyre sensors would be a great addition anyway.

Yes, of course I will let you know how I get on (the car is a BAC Mono by the way.)

Thanks for the very quick reply.
fernando.hiagon
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Re: RejsaRubberTrac - 16 zones tire temps - bluetooth sensor

Post by fernando.hiagon »

rbono459890 wrote: Fri Feb 26, 2021 4:03 am This is excellent work Magnus!

I am working on a simpler/less expensive version for motorcycles using a single read (not a matrix) device such as MLX90614.

How did you manage to compensate readings for distance?
The MLX90614 sensor has a wide aperture and reliable readings require close proximity in the few centimeters range (while I was hoping to mount the sensor no closer than 10cm).
Hi rbono459890
Could you provide the code you are using? I'm also trying to use the MLX90614 sensor. I would be very grateful.
best regards
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