Search found 138 matches

by costaud
Tue Jul 07, 2015 5:23 pm
Forum: ESP8266 SDK
Topic: How to make ESP8266 to sleep and not deep sleep
Replies: 2
Views: 5897

Re: How to make ESP8266 to sleep and not deep sleep

Hi, Please let me know, how to set the ESP8266 to SLEEP mode (normal sleep). I tried disconnecting the AP and STATION and I still see a 70mA constant current draw. I tried system_deep_sleep(all options) but it still wakes up into normal operation mode. I also tried options wifi_sleep_type(1,2 and 4...
by costaud
Tue Jul 07, 2015 5:07 pm
Forum: ESP8266 SDK
Topic: Wake-up from light sleep mode
Replies: 4
Views: 3929

Re: Wake-up from light sleep mode

Do I understand correctly that the esp8266 can only wake up from light-sleep using the timer or a gpio input change? Does this mean, for example, that it cannot wake up from an incoming character on the UART? Is the UART powered-down during light sleep? It is auto determined whether the chip is abl...
by costaud
Tue Jun 23, 2015 4:19 pm
Forum: ESP8266 SDK
Topic: PWM and SNTP issues
Replies: 8
Views: 4700

Re: PWM and SNTP issues

1. The new PWM module. (a) It does not appear possible to achieve 100% pulse width (100% on). I cannot get past around 90% - I've tried frequencies of 1024 and 500 - makes no difference. (b) There does not appear to be any function to turn off the PWM - which is a problem as once activated, things ...
by costaud
Thu Jun 18, 2015 11:22 am
Forum: Report Bugs
Topic: GPIO0 stuck at generating clk_out signal
Replies: 2
Views: 2249

Re: GPIO0 stuck at generating clk_out signal

Hi I'm using ESP-07 module and GPIO0 pin is stuck at generating clk_out signal (26MHz) even after performing reset. I'm unable to flash the module even after connecting GPIO0 to gnd. It gives "Failed to connect" error. Can it be fixed? Or, the chip has gone bad? Thanks Keep in mind thant ...
by costaud
Mon Jun 15, 2015 7:40 pm
Forum: ESP8266 SDK
Topic: 关于light-sleep的咨询
Replies: 1
Views: 2040

Re: 关于light-sleep的咨询

SDK1.1下,我在user_init中设置了 wifi_set_sleep_type(LIGHT_SLEEP_T); 但是,采用示波器实际测量的电流最小值始终在12-16mA间,无法达到SDK文档中的1mA. 我阅读了http://bbs.espressif.com/viewtopic.php?f=7&t=171,将我的各种任务全部关掉,仅剩下一个间隔10秒的TCP发送和接收程序. 请问还应该怎么做,才能使light-sleep模式生效. 请关闭softap模式,并使用单station模式连接到路由器。 如果仍然存在问题,请发送测试代码到support-product@espres...
by costaud
Tue Jun 09, 2015 10:41 am
Forum: General Q&A
Topic: 烧录失败,为什么?
Replies: 3
Views: 5079

Re: 烧录失败,为什么?

图片2右上角的CHIP_PD开关没有打开,请拨过来。
by costaud
Tue Jun 09, 2015 10:38 am
Forum: ESP8266 SDK
Topic: 周期休眠应用
Replies: 2
Views: 2998

Re: 周期休眠应用

我们的项目需要RTC定时唤醒,记录sensor数据。 RF部分平时不用,只有硬件触发才打开,以节约能耗。 请问下, 1. esp8266 支持RTC唤醒吗?如果支持软件和硬件要做什么样的处理。 2.RF部分能通过程序单独切换吗? Hi, 对于低功耗传感器应用,可以参考以下实例: http://bbs.espressif.com/viewtopic.php?f=5&t=272 特性: 1. 使用deep-sleep功能,待机功耗10-20uA. 2. RTC定时唤醒。 3. 可配制唤醒时不打开RF module做到超低功耗。 4. 不打开RF module时只记录传感器数据,记录多个数...
by costaud
Mon Jun 08, 2015 7:24 pm
Forum: ESP8266 SDK
Topic: Device does not enter light sleep
Replies: 1
Views: 1849

Re: Device does not enter light sleep

I am switching to opmode=1 (STA) and calling wifi_set_sleep_type to enter light sleep mode, however, the power consumption I see corresponds to modem sleep mode. I see the module running at ~15mA and waking up every beacon interval (DTIM1) during which the power jumps to ~60mA. I also see it contin...
by costaud
Mon Jun 08, 2015 4:39 pm
Forum: ESP8266 SDK
Topic: 关于boot mode相关IO的疑问
Replies: 1
Views: 2300

Re: 关于boot mode相关IO的疑问

leeshine wrote:flash boot mode

GPIO 15 :LOW

GPIO 0 : HIGH

GPIO2 : HIGH

启动的时候,这几个引脚有电平要求,疑问是:

作为通用,这几个IO与其他器件相连,上电的时候,引脚初始状态是各种各样?很难保证满足这么多条件:

?1:GPIO15浮空,也能启动,似乎无需保证低电平。
?2:GPIO0和GPIO2浮空,也能启动,似乎也无需保证高电平。
浮空容易受外界影响,用着怎么都感觉有点不稳定。 :idea: :idea: :idea:


1.GPIO15必须要下拉,因为模块上可能已经有下拉了。
2.因为IO0和IO2上电有内部上拉。
by costaud
Mon Jun 08, 2015 10:48 am
Forum: ESP8266 SDK
Topic: sdk v1.1.0 pwm控制问题
Replies: 1
Views: 2242

Re: sdk v1.1.0 pwm控制问题

esp sdk v1.1.0中新版的PWM并没有使用说明。 我们想用PWM控制灯,灯是高电平灭,低电平亮。 调用 void pwm_set_duty(uint32 duty, uint8 channel); 进行占空比控制。 由于duty是uint32,所以我传了个-1进去,发现灯不能全灭,还有有点微微亮起,即 pwm_set_duty(-1, channel); 是我的使用方式有问题,还是本身pwm有问题,用以前版本的sdk是可以使灯全灭的。 :idea: :idea: sdk1.1.1的版本的代码中,对pwm有一些注释说明,文档中也增加了相应介绍。 1.1.0之后版本的pwm进行了精度的...

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