[OpenTRV-interest] Frequent non-communication periods between hub and its valve

[EMAIL ADDRESS HIDDEN]

Hi,

1) After an hour minimum of provable failure of hub to communicate with the valve the valve has suddenly reacted to hub demand. OpenTRV has for some time been demanding 100%, the FHT8V has opened and displays 99 (%) (as expected).

2) The behaviour on succesful transmission was ... 


    Initial condition:
    OpenTRV has just (allegedly) transmitted (say) "v|%":100
    FHT8V displays: NO battery (symbol) (i.e. power ok), YES antenna (symbol), 0 (%)
    
    in quick succession ...
    b) FHT8V displays: NO battery, NO antenna, 0
    c) OpenTRV outputs: "FHT8V TX" (i.e OpenTRV transmits to valve)
    d) Shorter delay (< second - difficult to determine - i.e. antenna seems to blink now)
    e) FHT8V displays: NO battery, YES antenna, 0 (YES valve movement)
    f) FHT8V opens ...
    e) FHT8V displays: YES battery, YES antenna, 99 (NO valve movement)
    
    Hereafter
    in quick succession ...
    b) FHT8V displays: YES battery, NO antenna, 99
    c) OpenTRV outputs: "FHT8V TX" (i.e OpenTRV transmits to valve)
    d) Shorter delay (< second - difficult to determine - i.e. antenna seems to blink)
    e) FHT8V displays: YES battery, YES antenna, 99 (NO valve movement)

    Thus difficult at this time to determine if hub and valve actually in communication.

    Battery sumbol eventually reverts over ~10 minutes to NO battery (symbol) i.e. big power draw whilst valve opens, battery slowly recuperates.

Regards Gary


----Original Message----

From: EMAIL ADDRESS HIDDEN

Date: 28/03/2015 07:01

To: <EMAIL ADDRESS HIDDEN>

Subj: Re: [OpenTRV-interest] Frequent non-communication periods	between	hub and its valve



Hi,

1) Moved hub, now ~3m from FHT8V. After a week I seem to have noticed improved communications.

2) But, this morning I have noticed hub and valve are not succesfully communicating - i.e. hub is calling for heat but FHT8V is not responding and is showing valve at 0 (%).

3) However, I have noted the following behaviour which I have not noticed before and may or may not be relevant ...

    Initial condition:
    OpenTRV has just (allegedly) transmitted (say) "v|%":45
    FHT8V displays: NO battery (symbol) (i.e. power ok), YES antenna (symbol), 0 (%)
    
    a) OpenTRV adjusts valve need (say) "v|%":50
    ...
    in quick succession ...
    b) FHT8V displays: NO battery, NO antenna, 0
    c) OpenTRV outputs: "FHT8V TX" (i.e OpenTRV transmits to valve)
    d) Short delay (~second(s) - difficult to determine)
    e) FHT8V displays: NO battery, YES antenna, 0 (NO valve movement)
    
    This behaviour repeats indefinitely from "a) OpenTRV adjusts" ...


Any thoughts?

Regards Gary


----Original Message----

From: EMAIL ADDRESS HIDDEN

Date: 22/03/2015 12:44

To: <EMAIL ADDRESS HIDDEN>

Subj: Re: [OpenTRV-interest] Frequent non-communication periods	between	hub and its valve



As it happens the FHT8V after a big open or close does indicate batteries but otherwise not. I beleive the problem has existed for a long while so not necessarily recent i.e. related to power, plus I would have thought OpenTRV reset would be more tiring for the FHT8V, as I am assuming it would have to listen more and lock on. Nonetheless I will experiment.

Range: I am fairly certain I have tried greater ranges but saw no improvement.  Nonetheless I will experiment.

No need to apologise - not a complaint just a report.

I have another RF problem - I will report that seperately and before I start moving things around.

Regards Gary




----Original Message----
From: EMAIL ADDRESS HIDDEN
Date: 22/03/2015 11:04
To: "Open, non-developer list for interested parties"<EMAIL ADDRESS HIDDEN>
Subj: Re: [OpenTRV-interest] Frequent non-communication periods between	hub and its valve

Hi,

Two things commonly cause problems:

1) Transmitter too close to receiver seems to deafen it (FHT8V or OpenTRV in listen mode).  Minimum distance of ~2m seems to be safe.

2) Batteries getting low on FHT8V.

Sorry that you’re having this trouble!

Rgds

Damon

> On 22 Mar 2015, at 09:32, EMAIL ADDRESS HIDDEN wrote:
> 
> My OpenTRV system is suffering frequent and significant periods (hours) of unsuccesful communication between OpenTRV (hub) and its valve though only ~1m apart.
> 
> Resettimg OpenTRV resolves the issue thus not a basic RF problem but some kind of behaviour problem. After working for some considerable time (hours) problem seems to resurface. Otherwise no discernible pattern.
> 
> I have tried other positions radially and range (further away) for hub with no significant change in this behaviour.
> 
> RF goes through combinations of air, armchair, person, possibly corner of radiator but succeeds/fa
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