# BT Range (re-post from Totally Off Topic)
**URL:** https://f.ruuvi.com/t/bt-range-re-post-from-totally-off-topic/4551
**Category:** 🇬🇧 Development projects with Ruuvi products
**Created:** [21 December 2020 09:56 UTC](https://f.ruuvi.com/t/bt-range-re-post-from-totally-off-topic/4551 "2020-12-21T09:56:27Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Mikko](https://f.ruuvi.com/u/Mikko)
#### Post date: [21 December 2020 09:56 UTC](https://f.ruuvi.com/t/bt-range-re-post-from-totally-off-topic/4551/1 "2020-12-21T09:56:27Z")
Reposting to Beginners, originally in Totally Off Topic.
I have a dozen tags around my house. My iPhone sees some of them most of the time, and some are really hard to connect to.
First of all, I find some of the tag use examples on [Ruuvi.com](http://ruuvi.com/) a little optimistic. I put one tag in my car, to see when it is warm enough. The garage, a wooden shed 50 m from the house, was not reachable from a window with line of sight to the garage. I put another tag on the porch, 5 m from the kitchen window. It connects, occasionally. I wonder if cold weather makes a difference for the tag on the porch. Now it is -5…+5 degrees, and the tag has the standard battery. A third tag, in my wine cellar in the basement, also connects only occasionally, but that I can understand, with reinforced concrete structures.
Any ideas, does cold weather affect the battery and then the output power? Or is there a good transmit orientation for the tag, e.g., perpendicular to its face?
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### Author:  [@otso](https://f.ruuvi.com/u/otso)
#### Post date: [21 December 2020 11:25 UTC](https://f.ruuvi.com/t/bt-range-re-post-from-totally-off-topic/4551/2 "2020-12-21T11:25:19Z")
Cold weather affects the battery, but there’s an internal DC/DC voltage regulator which keeps the voltage going to radio stable in all conditions.
Radio is strongest “upwards”, the effect is a few decibels if I recall correctly. Sometimes it’s enough to make a difference. The effect of surface tag is installed on has a bigger effect, I think a RuuviTag on metal had -10 dB output power compared to RuuviTag on wood or glass.
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### Author:  [@Mikko](https://f.ruuvi.com/u/Mikko)
#### Post date: [21 December 2020 11:56 UTC](https://f.ruuvi.com/t/bt-range-re-post-from-totally-off-topic/4551/3 "2020-12-21T11:56:24Z")
Thanks. The tag is attached to a 2x4 board. So, on wood, not on metal. And there should not even be any metal, just some wood and an old-fashioned non-metallic window, between my phone and the tag. The stability of radio independent of the battery voltage, makes sense.
About directions, is _upwards_ the same as _perpendicular to the face_ of the tag?
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### Author:  [@otso](https://f.ruuvi.com/u/otso)
#### Post date: [21 December 2020 12:59 UTC](https://f.ruuvi.com/t/bt-range-re-post-from-totally-off-topic/4551/4 "2020-12-21T12:59:20Z")
> [@Mikko](#):
>
> About directions, is _upwards_ the same as _perpendicular to the face_ of the tag?
Yes, on the side with components on PCB/Gore-sticker on enclosure. Not to the side with test points. Like in images below, strongest direction is facing you.
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### Author:  [@Mikko](https://f.ruuvi.com/u/Mikko)
#### Post date: [21 December 2020 13:59 UTC](https://f.ruuvi.com/t/bt-range-re-post-from-totally-off-topic/4551/5 "2020-12-21T13:59:28Z")
This is the way I have attached the tag, facing the house. Maybe I need to try with another tag, to see if the unit now on the porch is somehow defective.