On Sun, 17 Feb 2019 13:51:45 -0000 (UTC)
Markus Robert Kessler  wrote:

>Am Sun, 17 Feb 2019 13:31:00 +0000 schrieb Folderol:
>
>> On Sun, 17 Feb 2019 11:28:35 +0000 druck  wrote:
>>
>>>On 17/02/2019 11:19, Markus Robert Kessler wrote:
>>>> I always wondered why I can only hardly get a connection to my WiFi
>>>> router when running Rasperries -- Zero up to 3B+ -- in desktop mode,
>>>> but there were no WLAN issues when running as ssh server.
>>>>
>>>> For doing this I formerly used an HDMI2VGA adapter (cheap 10 $ thing)
>>>> and it did work. But I recognized that it got really warm, and so, I
>>>> suspected that this energy came from the PC and not from the monitor.
>>>
>>>Connecting anything to the HDMI port causes an increase in power usage.
>>>A few of my Raspberry Pi's are connected to TV's, and I see an increase
>>>in SOC temperature of 4C when they are switched on.
>>>
>>>> I measured USB voltage output and found out that connecting this
>>>> "adapter"
>>>> will cause the output to go from around 5.2 V to 5.1 or below.
>>>>
>>>> This seems to significantly interfere with the internal WiFi module,
>>>> and, hence, when connecting the monitor with the Raspberry using a
>>>> "normal" HDMI-to-HDMI cable with no conversion, then the problems
>>>> connecting to WLAN router were gone.
>>>
>>>I've not noticed any issues with the internal WiFi and just a TV
>>>connected, but a HDMI powered dongle would be likely to affect it more
>>>than just a TV.
>>>
>>>---druck
>> Not seeing a problem here with a P3 BENFEI dongle from Amazon and a 3A
>> PSU
>
>"BENFEI"? With active power in? Like this one:
>
>https://www.amazon.com/Active-Adapter-Benfei-Converter-Gold-Plated/dp/
>B01KLKQN9U/
>
>Yes, sure this might solve the issue -- mine is not actively powered,
>because I was not aware of such problems when ordering...
>
>Good lesson -- thanks!
>
>Markus


Actually, I've found it will run quite happily without external power :)



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