ESP32-CoreBoard is sold out, ESP32-EVB design has started


ESP32 is really hot, the first lot we got sold out for couple of days. If we didn’t put the restriction for one module per order it would be sold out in matter of hours, as people wanted to buy x5 and x10.

ESP32-WROOM-32 modules are shipped from Espressif and we wait them to arrive next week.

Meantime we started the design of our ESP32-EVB board.

What we think so far is to have these features:

  • power supply from 5V
  • LiPo charger and step up converter to allow un-interruptable power supply
  • Two relays 220VAC/15A
  • Two user buttons
  • UEXT connector to which you can connect many of our sensor UEXT boards, or to program the board with serial cable same way like ESP8266-EVB
  • status LEDs

With the two relays you will be able to switch on and off two different appliances.

With the sensors on UEXT you will be able to measure temperature, light, moisture etc. and log them.

The plan is to complete the design in October and start selling this board in November.

Our target is to release this EVB for EUR 15.00.

If you think we should add something else let us know.

11 Comments (+add yours?)

  1. Ed
    Oct 22, 2016 @ 13:59:10

    In order of preference, I would suggest these: RJ45 Ethernet, micro SD card and 2-wire RS-485 interface. Maybe you can have a version with the connector unpopulated to keep cost down for those who don’t need them?


  2. Robert Went
    Oct 22, 2016 @ 14:20:37

    in my opinion ESP32 should be targeted as “multimedia” processor,a large power loss to control relays, leds etc.. it’s good for ESP8266.
    Maybe connector to touch screen display, i2s to high quality analog audio 😉


    • OLIMEX Ltd
      Oct 23, 2016 @ 08:47:42

      Actually not large power loss if you want secure connection SSL drives ESP8266 to the edge, I guess ESP32 will handle this more easily. No one wants unsecure connection to his home appliances, now we solve this with putting OLinuXino gateway between the ESP8266s and Internet as ESP8266 has no resources for 2048 bit encription


  3. SK
    Oct 23, 2016 @ 10:56:24

    Yep, the Ethernet connector is a must and maybe CAN if there is more information available for it (last time I checked it was only listed as a feature, but not found on the pinout list). Also cheap sets with the board and programmer, cables, etc – everything needed to get started (and a guide for this, of course).


    • SK
      Oct 23, 2016 @ 11:19:41

      Or maybe create a module with different base boards (EVB-style) – one with the 2 relays and ETH, one with more communication capabilities – RS485, CAN, I2S, ETH etc. The relays are a complicated problem, because they are never too much. I would prefer a board with 2 UEXT connectors and a cheap modular solution for adding relays to one of the UEXTs (similar to the MOD-IO, but witth beefier relays and no other features like opto inputs, MCU, etc, that make it expensive).


  4. SD card connector
    Oct 23, 2016 @ 20:14:47

    SD card connector, please!


  5. Scott Snowden
    Oct 23, 2016 @ 22:05:15

    I reviewed one of the original breakout boards on my website,, and found it generally very helpful to get started with the esp8266.

    For a few people, any breakout/compatibility with CAN would be most useful. If CAN protocol didn’t make its way into the final chip (or even if it did) might I suggest adding a pin compatible header for the widely available MCP2515 breakout boards on Ebay? E.g. ideally the CS pin would be configured via jumpers or solder pad jumpers.

    I would then very much like to see an SD card interface of sorts, and LCD display compatible header or port.

    I2C,SPI and power+gnd expander headers would be most useful for many projects. Multiple connections for these would make prototyping simpler without the need for a breadboard.

    As others have said, if these could be designed into the PCB but components not populated then this would keep the cost down. You may then be able to sell full kit versions at marked up prices.

    Note – I’ve just realised your UEXT connectors already do most of this, so well done! However, I can’t see how UEXT can handle multiple SPI devices on one SPI bus. It would be great if you created a CAN transceiver UEXT.


  6. Mikeloto
    Oct 24, 2016 @ 03:38:53

    Don’t forget these guys have very nice low consumption on deep sleep mode, we use esp8266 to develop custom LoRaWAN nodes and hope with ESP32 this will be very nice, and much more pins….

    We are planning to make a board on the shape of DIP module with the ESP32 LoRaWAN RFM95-868 band module , inexpensive SYN115 simple ASK radio tranceiver (took only one pin) on 433MHZ for closed distance apps and of course the Wifi and BLE from this guy. With this then the FCC and CE certification investment give us a nice spectrum coverage, for years…. a board like that will be so nice anyway…..


  7. Massimo Fidanza
    Dec 28, 2016 @ 15:06:15

    What happen to ESP32-EVB? It was planned for november, but december is almost gone.


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