Search found 70 matches

by onehorse
Sun Apr 08, 2018 2:18 am
Forum: General Discussion
Topic: Contract manufacturers for esp32
Replies: 1
Views: 887

Re: Contract manufacturers for esp32

Schotry International Corp in Beijing.
by onehorse
Sat Mar 03, 2018 6:38 pm
Forum: Hardware
Topic: ESP32 D2WD Module Design
Replies: 3
Views: 2810

Re: ESP32 D2WD Module Design

by onehorse
Sun Feb 18, 2018 2:54 am
Forum: Hardware
Topic: ESP32 D2WD Module Design
Replies: 3
Views: 2810

ESP32 D2WD Module 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...
by onehorse
Sat Feb 17, 2018 4:11 am
Forum: Hardware
Topic: ESP32 D2WD Development Board
Replies: 0
Views: 1183

ESP32 D2WD Development Board

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...
by onehorse
Sat Feb 17, 2018 3:09 am
Forum: Sample Code
Topic: ESP32 using ICS43434 as MEMS microphone in Arduino IDE
Replies: 7
Views: 2736

Re: ESP32 using ICS43434 as MEMS microphone in Arduino IDE

Please post the entire working Arduino sketch or link to a github repository where I can find it. Thanks!
by onehorse
Mon Feb 12, 2018 4:48 am
Forum: General Discussion
Topic: Record Speech and store
Replies: 2
Views: 2407

Re: Record Speech and store

by onehorse
Mon Feb 05, 2018 3:00 am
Forum: Hardware
Topic: ESP32D2WD available pins
Replies: 7
Views: 2637

Re: ESP32D2WD available pins

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...
by onehorse
Mon Feb 05, 2018 1:19 am
Forum: Hardware
Topic: ESP32D2WD available pins
Replies: 7
Views: 2637

Re: ESP32D2WD available pins

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...
by onehorse
Sun Feb 04, 2018 11:55 pm
Forum: Hardware
Topic: ESP32D2WD available pins
Replies: 7
Views: 2637

Re: ESP32D2WD available pins

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...
by onehorse
Sun Feb 04, 2018 11:38 pm
Forum: Hardware
Topic: ESP32D2WD available pins
Replies: 7
Views: 2637

Re: ESP32D2WD available pins

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

Thanks for you help!

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