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

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W J G

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