[OpenTRV-interest] Power to OpenTRV boards

[Alasdair Macdonald]

Thanks for this.

Useful to add to the wiki, with minor reformatting / cut & paste?

I'm happy to do so ...

Alasdair

On 10 November 2014 18:08, Damon Hart-Davis <EMAIL ADDRESS HIDDEN> wrote:
>
> On 10 Nov 2014, at 17:47, Alasdair Macdonald <EMAIL ADDRESS HIDDEN> wrote:
>
>> Quick summary and some questions about the jumpers and power options.
>> This is what I recall from our session the other evening:
>>
>>
>> * To power from FTDI cable, use both jumpers
>
> Correct.
>
>>
>> * If ONLY the jumper that is closer to the middle of the board is ON
>> (ie the one closer to the edge of the board is removed); then power
>> can be supplied from the micro USB cable (whilst the FTDI cable
>> remains connected, reading and writing data if necessary).
>
> Yes.
>
>
>>
>> Q1. In this case, is it OK to connect / disconnect the serial cable
>> whilst the device remains powered? (ie for changing settings, or
>> reading some data)
>>
>
> Yes, but plugging in the FTDI cable should cause a restart.
>
>>
>> * For battery power, remove BOTH jumpers.
>
> Correct.
>
>>
>> Q2. In this case, is it OK to connect / disconnect the serial cable
>> whilst the device remains powered? (ie for changing settings, or
>> reading some data)
>
> Yes,  but not the point about reset.
>
>>
>>
>> * Presumably jumpers should only be added / removed when there is NO
>> power connected?
>
> That would be wise.
>
> Rgds
>
> Damon
>