WROOM32 v1.0 vs v1.1 different trace antenna layout

jakehuang
Posts: 12
Joined: Thu Nov 17, 2016 7:12 pm

WROOM32 v1.0 vs v1.1 different trace antenna layout

Postby jakehuang » Wed Jun 21, 2017 7:39 pm

Hi guys,

While designing our next gen product, we found out that WROOM32 actually have two different trace antenna layout.

This really creates problems for our PCB design. We will be using an extern antenna with our product and really need to make sure want have the test points at the right place.

We sourced our esp32s from taobao and it seems all of them have the v1.0 design. It also might be the case that some of them do have v1.1 design but their artworks haven't been updated ?

Can anyone from within expressif confirm which layout is the most current one and from where we can source the version reliably?

Image

Best regards,

-jake

WiFive
Posts: 3008
Joined: Tue Dec 01, 2015 7:35 am

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

Postby WiFive » Thu Jun 22, 2017 3:01 am

That is interesting, v1.1 design is from DEC 2016 but I don't think I have seen a pic of one anywhere. Maybe that will be for rev1 rollout. There is another older design too but probably not in circulation anymore.

jakehuang
Posts: 12
Joined: Thu Nov 17, 2016 7:12 pm

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

Postby jakehuang » Thu Jun 22, 2017 5:02 am

Yea, I just can't seem to get hold of the v1.1 anywhere. Someone at Expressif please help!

ESP_Sprite
Posts: 4273
Joined: Thu Nov 26, 2015 4:08 am

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

Postby ESP_Sprite » Thu Jun 22, 2017 10:07 am

I'll ask around to see if I can find out what the latest revision is. If you want to have specific versions, your best bet may be to contact sales@espressif.com; they should be able to work something out for you.

ESP_Stanza
Posts: 19
Joined: Thu Nov 19, 2015 5:52 am

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

Postby ESP_Stanza » Thu Jun 22, 2017 11:54 am

Sorry to make you confuse.

ESP-WROOM-32 provided by sales department now is v1.0.

v1.1 is a better design. If you want to design your own module, you can use this reference design.

Since v1.0 has been mass produced and has gained many certifications, we have no plan to MP v1.1 version again and will continue providing v1.0 version. So if you decide to purchase modules from Espressif directly, please use v1.0.

We will add v1.0 on the website and make notice.
the rabbit in the hat

jakehuang
Posts: 12
Joined: Thu Nov 17, 2016 7:12 pm

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

Postby jakehuang » Fri Jun 23, 2017 10:31 am

Thanks everyone for your timely help. That clears things up for us. I will get our engineers to modify our baords to use v1.0.

Again, thanks Expressif for prompt support!

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