esp8266

• Links Sonoff , MicroPython , mqtt , ds18b20 , RabbitMq

• https://learn.adafruit.com/adafruit-huzzah-esp8266-breakout/overview

• 201512 - https://www.hackster.io/komedia/esp8266-automated-dog-feeder-using-pebble-watch-and-more-d43749?ref=newsletter&utm_source=Hackster.io+newsletter&utm_campaign=bbc5d934a5-2015_4_17_Top_projects4_16_2015&utm_medium=email&utm_term=0_6ff81e3e5b-bbc5d934a5-135098377

• Small wifi electronic module ESP-01(WIR04001251) and ESP-03(WIR04001252)

• Links Arduino/DS18B20TempSensors

• http://www.hobbytronics.co.za/p/930/esp8266-serial-wifi-wireless-transceiver

• 3D wifi map http://hackaday.com/2015/02/17/mapping-wifi-signals-in-3-dimensions/

• github project for ESP https://github.com/cnlohr/esp8266ws2812i2

• LUA + programming http://vaasa.hacklab.fi/2015/01/12/esp8266-ds18b20-thingspeak-nodemcu/

2019 connect old esp8266 Huzzah

• https://www.adafruit.com/product/2471

• Connect to usb using FDDI 3.3v cable (White usb plug)

  • Connect to serial /dev/ttyUSB using screen

    sudo screen /dev/ttyUSB0

  • When i click the reset button on esp8266 i get the welcome message

    NodeMCU 0.9.5 build 20150318  powered by Lua 5.1.4
    lua: cannot open init.lua

  • Switch on red led on esp8266 using lua commands

    gpio.mode(3, gpio.OUTPUT)
    gpio.write(3, gpio.LOW)
    #Pause red led on
    gpio.write(3, gpio.HIGH)

Program the HUZZAH ESP8266

For the HUZZAH ESP8266 breakout buttons for GPIO0 and RESET are built in to the board. Hold GPIO0 down, then press and release RESET (while still holding GPIO0), and finally release GPIO0.

$ sudo esptool --port /dev/ttyUSB0 erase_flash

• Upload firmware

  $ esptool --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=detect 0 firmware.bin
  ## Press hold left button, then click reset, upload begins.
  esptool.py v2.1
  Connecting........_____....._____....._____....._____....._____....._____.....
  Detecting chip type... ESP8266
  Chip is ESP8266
  Enabling default SPI flash mode...
  Configuring flash size...
  Auto-detected Flash size: 4MB
  Erasing flash...
  Flash params set to 0x0040
  Took 2.55s to erase flash block
  Writing at 0x00015800... (14 %)
  ...
  Wrote 615424 bytes at 0x00000000 in 67.2 seconds (73.2 kbit/s)...
  
  Leaving...
  Hard resetting...

Setup Arduino for esp8266

• Have to download Arduino linux tar file
• Un-tar and sudo ./install.sh to install

• Add aditional board url "http://arduino.esp8266.com/stable/package_esp8266com_index.json"

• Under boards, open board manager and search for esp8266, add
• Now select board, NodeMCU 0.9 ESP-12

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