Search found 140 matches

by Espressif_Kelly
Wed Sep 14, 2016 1:45 pm
Forum: ESP8266 HDK
Topic: Part failure in TX_POWER_BACKOFF
Replies: 3
Views: 2333

Re: Part failure in TX_POWER_BACKOFF

Hi,

补充说明:

测试时,是否是由于测试工装或者环境影响了 PCB 天线。

比如测试 PCB 天线被测试工装包起来了,与测试信号板之间有遮挡,这也会导致 back_off 增高。

请尝试手动焊线把模组裸露出来进行测试再观察一下测试数据。

如有问题,请反馈给我们。

谢谢!
by Espressif_Kelly
Tue Sep 13, 2016 8:48 pm
Forum: ESP8266 SDK
Topic: 请教ESP8266下载固件出错
Replies: 1
Views: 889

Re: 请教ESP8266下载固件出错

您好!

1.请确认串口连接是否良好。

2.可降低下载波特率为 115200 试下。

3.更新到最新的3.4.1 下载工具。
http://www.espressif.com/en/support/dow ... ther-tools

如有问题,请再反馈给我们。

谢谢!
by Espressif_Kelly
Mon Sep 12, 2016 7:38 pm
Forum: ESP8266 HDK
Topic: Part failure in TX_POWER_BACKOFF
Replies: 3
Views: 2333

Re: Part failure in TX_POWER_BACKOFF

您好!

请问贵司模块使用的是何种天线?是否有进行过阻抗匹配。

谢谢!
by Espressif_Kelly
Mon Sep 12, 2016 7:32 pm
Forum: ESP8266 HDK
Topic: 关于电源塌陷问题
Replies: 1
Views: 1274

Re: 关于电源塌陷问题

您好!

ESP8266EX 工作在 TX 的峰值电流可达 300mA,贵司使用的 XC6206 最大输出电流仅为 250mA,所以电源电压会被拉下。

建议使用 500mA 及以上的电源转换芯片。

如有问题,请告知。

谢谢!
by Espressif_Kelly
Wed Jun 08, 2016 10:32 am
Forum: General Q&A
Topic: CH_PD is draining Li coin cell battery[Done]
Replies: 2
Views: 2052

Re: CH_PD is draining Li coin cell battery

Hi, CH_PD, chip enable pin of ESP8266EX, is active high and cannot be dangled, otherwise its electrical level will be uncertain. For battery application, you can refer to below link for details. http://bbs.espressif.com/viewtopic.php?f=61&t=840 More questions, please feel free to let us know. Th...
by Espressif_Kelly
Wed Jun 01, 2016 10:33 am
Forum: General Q&A
Topic: WROOM-02 - PCB Layout[Done]
Replies: 1
Views: 1862

Re: WROOM-02 - PCB Layout

Hi, 1. In the WROOM-02 documentation, it shows the bottom of the WROOM's PCB. It appears to be a square patch of open copper. Should this area also be soldered to the projects PCB? ->There is a large ground pad in the bottom of ESP-WROOM-02 which is just for heat dissipation. It can work ok whether ...
by Espressif_Kelly
Wed May 18, 2016 10:58 am
Forum: ESP8266 SDK
Topic: ESP 12 - Strange behaviour
Replies: 1
Views: 4788

Re: ESP 12 - Strange behaviour

Hi, So sorry for missing your post. Have you resolved your problem? Whether uart interface has been connected to USB-SERIAL connector or not, it won't affect the working of ESP-12 module. UART interface is only for uart communication or debug. BTW, how you define that if the ESP-12 module works norm...
by Espressif_Kelly
Mon May 16, 2016 2:46 pm
Forum: ESP8266 HDK
Topic: Cannot download through Flash Download Tools[Done]
Replies: 12
Views: 7473

Re: Cannot download through Flash Download Tools

Hi,

We have received two kinds of modules from you.

Currently, we only get the schematic of one module. Please send the schematic of the other one to feedback@espressif.com.

Thanks.
by Espressif_Kelly
Thu May 12, 2016 7:39 pm
Forum: ESP8266 HDK
Topic: Cannot download through Flash Download Tools[Done]
Replies: 12
Views: 7473

Re: Cannot download through Flash Download Tools

Hi,

Kelly Lee
P: 021-61062079
#204, Block 2, 690 Bibo Road, Zhang Jiang High-Tech Park, Shanghai, China
by Espressif_Kelly
Thu May 12, 2016 2:13 pm
Forum: ESP8266 HDK
Topic: Cannot download through Flash Download Tools[Done]
Replies: 12
Views: 7473

Re: Cannot download through Flash Download Tools

Hi,

Please send the complete schematic (pdf) of your board, not just wifi part.

Please also send us photo of the test environment that you build.

Do you have the purchase link of this board? or can you send a sample to us? We need to test with this board and see what's wrong.

Thanks.

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