💬 ESP-LINK ESP8266 WeMos D1 Mini Adapter Board

[NeverDie]

@scalz
Will the ESP32 be capable of "ultra low power" in a real sense? Have you run any measurements?

[scalz]

imho, ultra low power is sub uA. Above, it's very low power :)

So, i'm not sure for ultra low power (depends also on strategy..), but very low power yes. I've not run any power consumption tests, focused on other parts. And the SDK is still not complete including the low power aspects. Some stuff is missing in ESP-IDF, but ready in Arduino, and vice versa. Docs are not complete yet, but looks good.
That said, ESP32 team is doing a great work! And Espressif is working on a revision of their sillicon die (there is an errata)...

[NeverDie]

@scalz
In that case, what's your definition of "very low power"?

[scalz]

lol, my very personal view, for battery operated devices:

• ultra low power : <= 1uA
• very low power : < 10uA
• low power : 100uA, not sure for this one :)

The same for the efficiency ;)

[NeverDie]

Will the ESP32 be able to remember its state (including all variable values) just prior to sleeping, like an atmega328p can, or like the ESP8266 do you have to explicitly store the state in flash before sleeping and then restore it upon waking up?

[scalz]

for more infos, easier to have a look at their docs but it's a lot smarter than esp8266.

[NeverDie]

@scalz
Fair enough. It's just that it's hard to know, as Nca78 points out, what parts of their documentation can be believed, and what parts are pure fantasy.

[NeverDie]

I notice Seeed Studio was selling the esp32 for $6.95, but it's presently backordered: https://www.seeedstudio.com/ESP-32S-Wifi-Bluetooth-Combo-Module-p-2706.html

Other seller are selling either the esp32 or the esp32 with an adapter board for 2-3x that amount. So, it's still early days until supply catches up with demand.

A few other things impress me about it:

1. it comes with Bluetooth Low Eenrgy,
2. 520kByte of SRAM.
3. Built in hardware support for 10 capacitive touch channels.
4. Apparently it comes with an RTC built-in
5. 240Mhz processor clock frequency
6. Two 10-bit DAC's. Quite a few 12-bit ADC's.

Sounds interesting!

[NeverDie]

@NeverDie

Which of the esp32 boards is the best one to buy? What I like about the Wemos board for the ESP8266 is that I can download a sketch without having to press any buttons on the board itself. Is there an esp32 board that works like that also?

[scalz]

yeah, it has nice specs ;)

which board to order ? Mine :stuck_out_tongue_winking_eye:
I'm kidding, I don't really have idea on this. I made mine..and am waiting for different pcb variant now :)

But I firstly ordered a Nano32 which I like. You can have pinheader on each side of the board when breadboarding. You can't with the official Espressif board which is too large.
There is lot of esp32 board released. But all have the first ic revision of course.

[NeverDie]

@scalz said:

yeah, it has nice specs ;)

which board to order ? Mine :stuck_out_tongue_winking_eye:
I'm kidding, I don't really have idea on this. I made mine..and am waiting for different pcb variant now :)

But I firstly ordered a Nano32 which I like. You can have pinheader on each side of the board when breadboarding. You can't with the official Espressif board which is too large.
There is lot of esp32 board released. But all have the first ic revision of course.

Uh, "first ic revision"? I haven't followed esp32 at all, obviously. Was there later a second ic revision? i.e. are all the boards currently out there saddled with obsolete ic's?

[scalz]

yes Espressif has released an Errata doc, some issues related to silicon die ic. Minor issue, depending of doing what with it.
I read the fixed version should be available at beginning of next year.

[NeverDie]

@scalz
Thanks! , I see that the next revision of the silicon is scheduled for February 2017: http://esp32.de/eco_and_workarounds_for_bugs_in_esp32_en.pdf
I'm in no rush. I'll wait until it's deemed ready for prime-time.

[NeverDie]

I've tested the board, and it works fine.

[NeverDie]

I added some photos of the lateset board version.

This project is now finished. :smile:

[NeverDie]

In case anyone is interested, I received my D1 Mini's directly from Wemos, and they are now marked directly on them as version 2.1.0:

[fets]

@NeverDie did you opened a dispute regarding your false wemos D1 V2 on aliexpress cause I have the same situation with the same seller.
Did you solve the issue ?
Thanks

[NeverDie]

No. I've had more important things to do that took precedence. I think the lesson is: buy only direct from Wemos.

[Nca78]

@fets it's easy to win the dispute in this case. Make side by side pictures of the board you received and the real wemos as advertised by the seller with title "real wemos" / "received from [seller name]" and put some big red arrows to point the differences.
In the text explain the differences and insist on cheaper esp8266 version with lower antenna performance. Explain you want full refund because the price of items is not worth the time and money to send them back.
The best is if you can make the seller admit in private message that he is not selling genuine boards but copies. Then screen capture of conversation is your quick ticket for full refund.
Should take you less than 15mns.

Be careful about vicious sellers trying to make you cancel dispute withe empty promises, or proposal of resolution with nice comment talking about refund/resend but choice of solution in the list selected as "no resend, no refund" or "refund" with value 0$ :D

[fets]

@Nca78 thanks, I'll try it