ESP8266 ESP-07 - co koupit + navod

ESP8266 ESP-07 WiFi modul (imho nejlepsi verze co se dela)
http://www.aliexpress.com/item/New-version-ESP-07-ESP8266-WiFi-REMOTE-Serial-Transceiver-wireless-Module-ESP-07-UNO-ROBOT-COMPONENT/32342762780.html

Redukce na 2,54mm pin header (temer nutnost, wifi modul ma roztec 1,27mm)
http://www.aliexpress.com/item/ESP8266-serial-WIFI-module-adapter-plate-Applies-to-ESP-07-ESP-08-ESP-12/32381092806.html

Linearni 3,3V stabilizatory. Pozor, maji jine zapojeni nez 78xx!!! viz datasheet
http://www.aliexpress.com/item/5-PCS-LM1117T-3-3-LM1117T-LD1117-regulated-hym-selling-3-3-v-220/32338626964.html

Ja pouzivam tento DC-DC menic. Je luxusne maly.
http://www.aliexpress.com/item/RC-Airplane-Module-Mini-360-DC-Buck-Converter-Step-Down-Module-4-75V-23V-to/32266152653.html

Prevodnik logickych urovni 5V <---> 3,3V.
http://www.aliexpress.com/item/Free-shipping-4-channel-IIC-I2C-Logic-Level-Converter-Bi-Directional-Module-5V-to-3-3V/32361171646.html

Volitelne pigtail na externi antenu. (wifi modul ma integrovanou keramickou antenu)
http://www.aliexpress.com/item/ABWE-15CM-RF-Pigtail-RP-SMA-male-female-pin-to-u-FL-IPX-cable-1-13mm/32337272147.html


Ten prevodnik logickych urovni se da vyrobit, ale kdo by to za ty penize (asi 9 Kc) delal? :-D
Takhle by mel fungovat:
	https://cdn.sparkfun.com/r/400-400/assets/f/3/3/4/4/526842ae757b7f1b128b456f.png
	https://raw.githubusercontent.com/tuanpmt/espduino/master/fritzing/espdruino_bb.png
Tady je ukazka pouziti toho kupovaneho: https://learn.sparkfun.com/tutorials/bi-directional-logic-level-converter-hookup-guide


Programuje se to v jejich upravenem Arduino IDE. Nova verze uz se myslim pouziva, jako plugin v oficialnim Arduino IDE.
https://github.com/esp8266/Arduino
Instalovat podle navodu: https://github.com/esp8266/Arduino#installing-with-boards-manager

Zapojeni doporucuji toto:
https://github.com/esp8266/Arduino/blob/esp8266/hardware/esp8266com/esp8266/doc/boards.md#esp-to-serial
ESP-12 je temer stejna jako verze ESP-07 (asi se lisi jen antenou).

Info k ESP-07 WiFI modulu:
http://www.esp8266.com/wiki/doku.php?id=esp8266-module-family#esp-07


* pro stabilni pouzivani je potreba zajisti, aby zdroj dal 3,3V >= 250mA (hlavne kvuli vysilani).

* pred programovanim je potreba prepnout ESP8266 do bootloader modu.
  zarizeni pri startu kontroluje GPIO a pokud je GPIO0 pripojeny na GND, je mozne nahrat firmware.
  Jinak normalne bootuje z flash.
  Pro preprogramovani nestaci pouze uzemnit GPIO0, je treba ho uzemnit a teprve pak pripojit napajeni!

* pinout wifi modulu: https://goo.gl/Cgd3zZ

* teoreticky by melo jit bootovat z SD karty, ale nezkousel jsem to: https://goo.gl/O53SGq

* ESP-07 ma 9 GPIO

* prehled ESP8266 modulu: http://l0l.org.uk/2014/12/esp8266-modules-hardware-guide-gotta-catch-em-all/

* hardwarova specifikace wifi modulu: https://github.com/esp8266/esp8266-wiki/wiki#what-is-this-esp8266
  - wireless SoC
  - GPIO, I2C, ADC, SPI, PWM, ...
  - RISC 32bit 80MHz
  - 64KBytes of instruction RAM
  - 96KBytes of data RAM
  - 64KBytes boot ROM
  - Winbond W25Q40BVNIG SPI flash 4Mbit (512KByte)