Schematics of Espressif ESP32 dev boards & modules

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rudi ;-)
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Joined: Fri Nov 13, 2015 3:25 pm

Re: Schematics of Espressif ESP32 dev boards & modules

Postby rudi ;-) » Wed Jul 12, 2017 2:32 pm

Hi Angus

i wounder me - does we have Shematic V3 Wrover-Kit
do you know ( cause SW1 problem ) i would look up -

txs
best wishes
rudi ;-)
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loboris
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Re: Schematics of Espressif ESP32 dev boards & modules

Postby loboris » Wed Jul 12, 2017 2:57 pm

https://dl.espressif.com/dl/schematics/ ... _SCH-3.pdf
I have no problem with SW1, except when sdcard is in socket and initialized.

ESP_Angus
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Joined: Sun May 08, 2016 4:11 am

Re: Schematics of Espressif ESP32 dev boards & modules

Postby ESP_Angus » Thu Jul 13, 2017 9:37 am

Thanks loboris, I'd forgotten to add a link to the first post (added now).

Prasad
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Joined: Sun Jul 23, 2017 5:26 pm

Re: Schematics of Espressif ESP32 dev boards & modules

Postby Prasad » Sat Nov 24, 2018 5:52 pm

Hi Angus,

Can you share the specs for the PCB antenna design? I don't have Pads software to read reference PCB design to measure the dimensions.

Thanks,
Prasad.

ESP_Angus
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Joined: Sun May 08, 2016 4:11 am

Re: Schematics of Espressif ESP32 dev boards & modules

Postby ESP_Angus » Mon Nov 26, 2018 4:33 am

Hi Prasad,
Prasad wrote:
Sat Nov 24, 2018 5:52 pm
Can you share the specs for the PCB antenna design? I don't have Pads software to read reference PCB design to measure the dimensions.
The Reference Designs should include a directory with design files in the industry standard Gerber format. A Gerber viewer (free ones available for most platforms) should allow you to look at the specific dimensions of the PCB antenna.

Note that PCB antenna design can be PCB fabrication process dependent, so you may need to test prototypes and tweak them a little to get optimal performance.

ESP_Angus
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Joined: Sun May 08, 2016 4:11 am

Re: Schematics of Espressif ESP32 dev boards & modules

Postby ESP_Angus » Mon Nov 26, 2018 4:34 am

Note that this post hasn't been updated lately as Reference Designs are now available on the Espressif web site:
http://espressif.com/en/support/download/documents

Prasad
Posts: 48
Joined: Sun Jul 23, 2017 5:26 pm

Re: Schematics of Espressif ESP32 dev boards & modules

Postby Prasad » Tue Nov 27, 2018 3:45 pm

Ohh why didn't i notice that. Dumb me :lol: Thanks Angus, Just checked with KiCad Gerber Viewer and i can measure the antenna dimensions. Btw i have already sent one prototype to fab with TI's SWRA 117 reference antenna specs, lets see how that goes too :)

Prasad
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Joined: Sun Jul 23, 2017 5:26 pm

Re: Schematics of Espressif ESP32 dev boards & modules

Postby Prasad » Wed Nov 28, 2018 9:13 am

Hi Angus,

Just for the reference here is my KiCad 3D rendering which i have already sent for fab. Indeed dimensions of this antenna is bit different from the reference antenna. but i'll post the result anyway when it arrived.


2.png
2.png (332.69 KiB) Viewed 12846 times
Thanks,
P .

Prasad
Posts: 48
Joined: Sun Jul 23, 2017 5:26 pm

Re: Schematics of Espressif ESP32 dev boards & modules

Postby Prasad » Sat Dec 22, 2018 2:52 pm

Hi Angus,

I have assembled my PCB design with SWRA 117 antenna. And i must say it works a treat. I have tested bluetooth connection upto 20 meters with obstacles(Haven't tested with line of sight distance yet) and it maintained the connection.

Btw how do you define the optimal performance?

For the reference i used SWRA 117 antenna which came with KiCad default footprint library. And for the fab i used JLCPCB.

Having all that said i'm gonna change the antenna to the recommended dimensions when i'm doing the final miniaturized PCB design. This is more of a proof of concept of our product(rest of the PCB is a secret squirrel ;) ).

Here is the picture of it,
1.png
1.png (10.27 MiB) Viewed 12621 times
Kind Regards,
P.

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