Search found 197 matches

by rudi
Mon Jul 25, 2016 4:45 pm
Forum: ESP8266 SDK
Topic: I2C with arduino and Display
Replies: 10
Views: 9050

Re: I2C with arduino and Display

Hi After the start I got this error message. Where is my mistake? Pins on ESP WROOM 02 is IO14-SCL and IO2-SDA ... ok ? see image Jarek DisplayOLED:11: error: no matching function for call to 'OLED::OLED(int, int)' OLED display(4, 5); ^ have you rename the folder ? Click on the Download ZIP button ...
by rudi
Mon Jul 25, 2016 7:51 am
Forum: ESP8266 SDK
Topic: I2C with arduino and Display
Replies: 10
Views: 9050

Re: I2C with arduino and Display

Hi Thank for answer.. So ESP WROOM-02 as I2C Master (GPIO 14,2) and Display is slave.. Arduino is IDE for developer.. All 3.3V Jarek hi jarek ah, i think i have you missunderstand. you develop with the Arduino IDE for ESP8266 and want code for the WROOM-02 that display a Text on Oled, right? do you...
by rudi
Mon Jul 25, 2016 5:35 am
Forum: ESP8266 SDK
Topic: I2C with arduino and Display
Replies: 10
Views: 9050

Re: I2C with arduino and Display

append.. in the example with arduino and oled and esp, you connect then sda, scl to each, so be sure, you use then a level shifter between a 5 v arduino and the oled( 3.3 v ) and the esp ( 3.3v) i think there are 5v compatible oleds too on market, so check moretimes, what components you use. you can...
by rudi
Mon Jul 25, 2016 5:22 am
Forum: ESP8266 SDK
Topic: I2C with arduino and Display
Replies: 10
Views: 9050

Re: I2C with arduino and Display

Hi I want to controll arduino with ESP8266 and Espressif using I2C. Will anybody please provide a sample program and steps. Display OLED 128x64... 1,3" WiFi is ESP wroom 02 Test etc. Hello world.. Thanks ESP WROOM-02 as I2C Master Arduino as I2C Slave ( for communication with ESP ) right? wher...
by rudi
Sat Jul 23, 2016 9:41 pm
Forum: Sample Codes
Topic: [ESP8266] I2C_Demo
Replies: 3
Views: 10193

Re: [ESP8266] I2C_Demo

pete,
have a look to elliot's post at hackaday
excelent infos about the ACK, NACK, 7 bit address and so on.
where you hang? what is the detailed problem?
how looks your arduino code?

best wishes
rudi ;-)
by rudi
Wed Jul 20, 2016 7:58 am
Forum: Sample Codes
Topic: [ESP8266] I2C_Demo
Replies: 3
Views: 10193

Re: [ESP8266] I2C_Demo

.. I'm having trouble - I have an ESP8266 talking to Arduino. hi pete, i understand you so , you use ESP8266 as I2C Master Arduino as I2C Slave ok? The ESP can send multiple bytes to the Arduino - no problem - but I haven't a clue how to get multiple bytes back into the ESP. so , do this: you pulse...
by rudi
Sat Jul 09, 2016 11:54 pm
Forum: Documentation Request
Topic: I2C Slave Mode
Replies: 60
Views: 102911

Re: I2C Slave Mode

Rudi, this looks very exciting! I would be very grateful if you could share the library, because there is currently no proper way of running an ESP as a slave apart from using UART. hi left side ( I2C slave): ESP8266 with BMP right side ( I2C master ) : ESP8266 with OLED (central ) Master send CMD ...
by rudi
Sat Jul 09, 2016 11:11 pm
Forum: Report Bugs
Topic: Hardware MD5 - Fatal exception 9(LoadStoreAlignmentCause)
Replies: 5
Views: 7836

Re: Hardware MD5 - Fatal exception 9(LoadStoreAlignmentCause)

Hello Rudi, I'm not sure what you mean by the hardware MD5? Can you please post a link to the documentation you referred to? By the way, its seems like an access to misaligned memory address. If you can narrow down and found out which line is causing the exception, it can be removed. English is pro...
by rudi
Sat Jul 09, 2016 6:02 am
Forum: ESP8266 HDK
Topic: ESP8285下载后不运行
Replies: 3
Views: 6710

Re: ESP8285下载后不运行

hi tony

do you use the esp8285?
how you flash it - with the same flash tool's like esp8266`?

would use this:

Code: Select all

esptool.py --port <serial-port> write_flash -fm dout -fs 1m 0x00000 <firmware>



thanks
best wishes
rudi ;-)
by rudi
Sat Jul 09, 2016 5:59 am
Forum: ESP8266 SDK
Topic: 似乎SDK里内置了MD5,SHA1等,有相关的说明文档吗?
Replies: 5
Views: 4331

Re: 似乎SDK里内置了MD5,SHA1等,有相关的说明文档吗?

留意到 eagle.rom.addr.v6.ld 里有MD5,SHA1等函数: PROVIDE ( MD5Final = 0x40009900 ); PROVIDE ( MD5Init = 0x40009818 ); PROVIDE ( MD5Update = 0x40009834 ); 试了一下居然是可用的;2C文档里很多没有录入,是不成熟不能用还是其他原因? 性能好过外置MD5或者SHA1库吗?有硬件运算? 其他大部分似乎只能望文生义,有关于 这部分,内置函数的文档吗? 谢谢。 hi have a try - 1.5.4 SDK NONOS get now not the same li...

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