New Lolin D32 Pro with 4MB PSRAM

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mcauser
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New Lolin D32 Pro with 4MB PSRAM

Post by mcauser » Tue Jun 12, 2018 12:56 pm

New Lolin D32 Pro with 4MB Flash + 4MB PSRAM (ESP32-WROVER)
https://www.aliexpress.com/store/produc ... 16057.html

The D1 Mini Pro has been upgraded too - it's now on a green PCB and Lolin branded, with 16MB flash and LiPo charger.
https://www.aliexpress.com/store/produc ... 92514.html

Looks like they are phasing out the Wemos brand in favour of Lolin.

bitninja
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by bitninja » Tue Jun 12, 2018 5:44 pm

I suppose the spacing of the headers is the same as the older Wemos D1 Mini Pros... so that at least the shields should still work. Nice to see they are using the MicroPython pin numbering scheme now!

OutoftheBOTS_
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by OutoftheBOTS_ » Tue Jun 12, 2018 9:19 pm

If they free of any hardware bugs then they look like some of the best ESP32 devs boards on the market.

Does anyone know if it is A jst sh plug the same as spark fun uses for there qwiic system??

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mcauser
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by mcauser » Tue Jun 12, 2018 9:43 pm

It appears to be the same battery connector they used for the D1 mini power shield, Lolin 32, Lolin 32 Lite, Lolin D32 and D1 mini pro v2. On the wiki it’s described as "PH2-2.0mm battery connector". I believe that is a JST connector, same used on the Adafruit Feather boards.

The I2C and TFT connectors are SH1.0-4P and SH1.0-10P. Commonly used with RC gear.

The Sparkfun Qwiic connector appears to be compatible but the pin order is: GND,3v3,SDA,SCL.

The datasheet for the Wemos DHT shield says the pin order is different: GND,SDA,SCL,3v3.

To use Qwiic, you’ll need to reorder the pins in one of your tiny 4P jumper cables.

OutoftheBOTS_
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by OutoftheBOTS_ » Tue Jun 12, 2018 10:48 pm

It appears to be the same battery connector they used for the D1 mini power shield, Lolin 32, Lolin 32 Lite, Lolin D32 and D1 mini pro v2. On the wiki it’s described as "PH2-2.0mm battery connector". I believe that is a JST connector, same used on the Adafruit Feather boards.

The I2C and TFT connectors are SH1.0-4P and SH1.0-10P. Commonly used with RC gear.

The Sparkfun Qwiic connector appears to be compatible but the pin order is: GND,3v3,SDA,SCL.

The datasheet for the Wemos DHT shield says the pin order is different: GND,SDA,SCL,3v3.

To use Qwiic, you’ll need to reorder the pins in one of your tiny 4P jumper cables
Is the polarity on the battery connector the same as Adafruit as there doesn't seem to be a standard and each manufacture just wires which ever way they want. I did let the magic smoke out of a board by not checking first.

It is a pity that the jst sh connectors for the I2C are doing the same thing as not having a standard making it easy for beginners to smoke up some of there goodies

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mcauser
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by mcauser » Wed Jun 13, 2018 12:15 am

Judging from photos alone, the battery connector seems to be the same polarity as the Adafruit boards.
The polarity seems consistent with previous Lolin boards.

I'll confirm once mine arrive on the slow boat.

There's a good blog post with details about the retired Lolin 32 charge circuitry. Google translate is your friend.
https://macsbug.wordpress.com/2017/05/0 ... f-lolin32/

ARTaylor
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by ARTaylor » Thu Jun 14, 2018 6:57 am

Does the D32 have a microSD slot? That would be a super useful feature for me! I hope there is some improvement with the battery drain in deep sleep.

Edit: yes it is, sweet! This could be an awesome board for remote data logging! I've been keen to try out Micropython for data logging.
Grow something!

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mcauser
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by mcauser » Thu Jun 14, 2018 7:17 am

The D32 does not have an onboard MicroSD slot. The new D32 Pro does. It's one of those half height ones, like on the pyboard.
You can still connect an external MicroSD board to the D32.

The wiki page is up now: https://wiki.wemos.cc/products:d32:d32_pro

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mcauser
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Re: New Lolin D32 Pro with 4MB PSRAM

Post by mcauser » Thu Jun 14, 2018 7:19 am


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Re: New Lolin D32 Pro with 4MB PSRAM

Post by ARTaylor » Fri Jun 15, 2018 7:49 am

mcauser wrote:
Thu Jun 14, 2018 7:17 am
The D32 does not have an onboard MicroSD slot. The new D32 Pro does. It's one of those half height ones, like on the pyboard.
You can still connect an external MicroSD board to the D32.

The wiki page is up now: https://wiki.wemos.cc/products:d32:d32_pro
Thanks for clearing that up - I literally just discovered that before I came back to this thread!
Grow something!

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