[57north-discuss] ESP32 poor wifi, likely due shielding by a nearby ESP8266

[Lawrence]

Wouter

Should of also added you may find that the 8266 PCB is acting as a 
ground plane/antenna reflector  to the ESP32 and making the RF pattern 
even more away from the router, Think dome shaped.

L.

On 16/05/2020 08:57, Lawrence wrote:
> Wouter
>
> PCB antennas can be very directional, in recent EMC testing of a BLE 
> 2.4ghz modified F antenna I had a difference of circa 10dB as you 
> rotated the pcb around 360 degrees, with even worse above and below 
> the plane of the PCB antenna.
>
> If within any casing you have is there room to rotate the PCB, that 
> might help.
> Daft question: Not having seen the mount is it on a pole or similar 
> that can be rotated 90 degrees in the vertical plane.
>
> Does your router allow you to survey local access points (I use a 
> draytek which will do a scan of all the bands so you can see what is 
> around you and on what chaannels) with a view to chnaging the 2.4ghz 
> channel. Not fail safe as some routers will do dynamic selection - 
> i.e. at start will look at choose a channel based on current use. Also 
> some systems are better away from top and bottom channels.
>
> Lawrence
>
> On 16/05/2020 08:33, Wouter Piessens wrote:
>> Good morning folks,
>>
>> Yesterday I managed to move my weather station to the back of the 
>> garden and at same time install Kevin's air quality sensor on the 
>> same mount. Unfortunately, due to the design of the mount, the ESP32 
>> in the weather station is shielded in the direction of the router by 
>> the ESP8266 in the air quality box.  Hence, the router is only seeing 
>> the air quality ESP8266.
>>
>> Unless there are no other options, I will not rebuild the mount.  I 
>> wonder if any of you know of any tricks to boost the wifi signal 
>> through hardware or via software (micropython) for the onboard wifi 
>> antenna.  Moving the wifi router does not seem to help.    Except for 
>> the ESP's, all my internet connections at home use the 5 GHz bands or 
>> are wired.  But obviously the tens of neighbours have likely hundreds 
>> of 2.4 GHz wifi appliances disturbing the spectrum nonetheless.
>> Distance between ESP's and router: 20m horizontal, 2m vertical, with 
>> only a window between them.
>>
>> Any ideas?
>>
>> Cheerio,
>> Wouter
>>
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