My Wiki: Esp8226

ESP8226 , Witty, NodeMCU and WEMOS D1 R1 modules

eBay suggested the ESP01 and these modules using the ESP8226.

and

These were very reasonably priced and the ESP8226 chip has a later version more suited to HTTPS.

see https://www.schatenseite.de/en/2016/04/22/esp8266-witty-cloud-module/

https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/ - Useful Guides

ESP and Thorny

https://thonny.org/ provides a way to use Python and can flash these modules, by selecting the interpreter.

NOTE: I found I had to specify the size of the serial ROM to 4MB , Otherwise the little blue light flashed really fast and the REPL

Thorny comes with the Raspberry Pi.

I brought some boards with an ssd1306 soldered on and it need this:-

 from machine import Pin, I2C
 import ssd1306

 # using default address 0x3C
 #i2c = I2C(sda=Pin(5), scl=Pin(6))
 #
 # Hello World!
 # IM ESP8226 OLED!
 # D5=GPIO12=SCL   !!- typo?
 # D6=GPIO14=SDA   !!- typo?
 #
 # This works for my modules:-
 # i2c = I2C(sda=Pin(14), scl=Pin(12))

display = ssd1306.SSD1306_I2C(128, 64, i2c)

ESP and Arduino

The Arduino IDE can be used. It has loads of useful examples to learn about simple IOT using HTTP and other protocols.

ESP and ulisp

http://www.ulisp.com/ can be uploaded.

Bigger pictures

https://protosupplies.com/product/esp8266-witty-cloud-esp-12f-wifi-module/

https://yoursunny.com/t/2016/WittyCloud-first/ - interesting little module.

https://jpralves.net/post/2016/11/15/esp8266.html - loads of useful information

https://github.com/tasmota/docs/blob/master/docs/devices/Wemos-D1-R1-%26-R2.md - looks intersting

My nodemcu module can overload the USB socket.