Schotry International Corp in Beijing.

More here at Hackaday.io.

https://hackaday.io/project/71283-small ... tom-design

I decided to try and design a small module using the ESP32 D2WD with 2 MByte embedded flash. This is partly because it is convenient to have a solution that can be dropped into a more complex design to provide wifi/BLE as well as the fact that soldering the D2WD is a pain and having a batch of these...

I just finished assembling my first development board using the smaller (5 mm x 5 mm) QFN48 ESP32 D2DW package with embedded 2 MByte SPI flash. [img] ESP32.v02.top.jpg [/img] [img] ESP32.v02.bottom.jpg [/img] Thanks to some help from WiFive I was able to get it just about right the first time. The p...

Please post the entire working Arduino sketch or link to a github repository where I can find it. Thanks!

Well, there are these:

https://www.tindie.com/products/onehors ... rod_search

I appreciate the info, thanks for your help. I more or less completed the design but there is little advantage to using the D2DW other than the enbedded flash and some downsides, two fewer GPIOs and more difficult to solder. I'll give it a try ayway and see if I can get the board to work. Here is wh...

Does this mean a 2 kOhm external pull down resistor on VDD_SDIO? This seems rather strange...

I am using the internal flash of the D2WD so I am not sure this would apply? Where did you find this note? And is there a hardware reference guide specifically for the D2DW IC? That would be helpful...

Thank you for your reply! I've been trolling through the past posts on the D2WD device looking for answers. I probably do not want to expose 1.8 V pins on a 3V3 boards. One more thing if I may, the VDD_SDIO probably shouldn't be connected to 3V3. Do I need a bypass cap on this pin to GND then or sho...

Can no one from Espressif offer some answers here? Should I ask somewhere else? Suggestions?

Thanks for you help!