Search found 25 matches

by ESP_Lvxinyue
Fri Dec 07, 2018 6:34 am
Forum: Documentation
Topic: [Documentation Release] ESP32 Technical Reference
Replies: 35
Views: 30151

Re: [Documentation Release] ESP32 Technical Reference

Hi all, the TRM is now V4.0. Major changes span four chapters. The link remains the same: https://www.espressif.com/sites/default ... ual_en.pdf
Remember to subscribe to our email notification at: https://www.espressif.com/en/subscribe
by ESP_Lvxinyue
Tue Nov 27, 2018 6:26 am
Forum: Documentation
Topic: Document Requests
Replies: 46
Views: 23585

Re: Document Requests

michprev wrote:
Sat Nov 24, 2018 3:58 pm
Setting SPI_CLKCNT_H too high in SPI_CLOCK_REG register makes in some cases (probably depending on SPI_CLKCNT_N) stop SPI working. This is not documented.
PI_CLKCNT_H=⌊SPI_CLKCNT_N+1/2 – 1⌋, SPI_CLKCNT_N=SPI_CLKCNT_L
by ESP_Lvxinyue
Tue Nov 27, 2018 6:24 am
Forum: Documentation
Topic: Document Requests
Replies: 46
Views: 23585

Re: Document Requests

[SPI] CS setup time does not work in full duplex I don't think you realise how huge problem this is. Full-duplex is the most common setup and most SPI peripherals require CS active several clocks before the data transfer. In full-duplex mode, setting SPI_CS_SETUP results in 1.5 SPI clock cycles bet...
by ESP_Lvxinyue
Wed Nov 21, 2018 2:50 am
Forum: Hardware
Topic: Future WROVER kit with 8 or 16MB flash.
Replies: 1
Views: 147

Re: Future WROVER kit with 8 or 16MB flash.

Hi,

ESP-WROVER-KIT now supports ESP32-WROVER-B with 4 MB flash. Custom order for 8/16 MB flash may be possible. Please contact our salesperson for more information. Thanks.
by ESP_Lvxinyue
Wed Nov 14, 2018 11:36 am
Forum: ESP32 Arduino
Topic: Technical Parameters of ESP-WROOM-32
Replies: 3
Views: 255

Re: Technical Parameters of ESP-WROOM-32

Hi, I are using ESP-WROOM-32 in an application. Please provide the following details regarding ble transmission of ESP-WROOM-32. 1) modulation bandwidth , 2) frequency channels and 3) data rate. 4) Tx Power Can we change above parameters programatically? If yes, please tell how to change these valu...
by ESP_Lvxinyue
Wed Oct 31, 2018 3:03 am
Forum: Hardware
Topic: PSRAM/SD card/PICO D4
Replies: 9
Views: 1258

Re: PSRAM/SD card/PICO D4

Hi,

For your reference, CS# is tied to either SD2 or SD3, and a 10k pull-up is necessary. Thanks.
by ESP_Lvxinyue
Mon Oct 29, 2018 11:23 am
Forum: Hardware
Topic: Looking for a ESP32‑D2WD module
Replies: 2
Views: 294

Re: Looking for a ESP32‑D2WD module

Hi,

I'm afraid there is no such ESP32 module. Further sales questions can be sent to https://www.espressif.com/en/company/co ... stions-crm. Thanks.
by ESP_Lvxinyue
Fri Oct 19, 2018 10:53 am
Forum: Report Bugs
Topic: New Wroom-32 modules JTAG Problem
Replies: 2
Views: 1334

Re: New Wroom-32 modules JTAG Problem

It seems like the initial firmware is interfering with JTAG pins.

Do you know what is the firmware flashed onto these new modules at factory, and why does it use JTAG pins?
by ESP_Lvxinyue
Mon Sep 17, 2018 3:12 am
Forum: Hardware
Topic: PSRAM/SD card/PICO D4
Replies: 9
Views: 1258

Re: PSRAM/SD card/PICO D4

Hi,

You may try the following connection:

PICO <----> PSRAM
SD1 <----> SIO0
SD0 <----> SIO2
CLK <----> SCLK
CMD <----> SIO3
IO17 <----> SIO1
SD2/SD3 <----> CS#

Hope it'd help. Let me know if you have further questions. Thanks.
by ESP_Lvxinyue
Fri Sep 14, 2018 6:46 am
Forum: Hardware
Topic: Guidelines for external antenna layout
Replies: 12
Views: 4395

Re: Guidelines for external antenna layout

Hi I want to know how to connect an external antenna with an ESP32-wroom-32 as we have an application of light bulb in which the ESP32 module will go inside the aluminium body of the bulb. This will decrease the range/signal strength of the WiFi and BLE. So is it possible to solder an external on t...

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