[OpenTRV-interest] Power to OpenTRV boards

[Damon Hart-Davis]

Hi,

Feel free!  Tell me if you need to be granted write access (and what your sf ID is).

Be especially clear that this is for REV2 boards in particular.

Rgds

Damon

On 10 Nov 2014, at 19:44, Alasdair Macdonald <EMAIL ADDRESS HIDDEN> wrote:

> 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
>>