This guide is for Windows users who want to use the Buy vcc with bitcoin environment. ESP8266 for something useful in less than an hour. What do I need to buy? You will need an ESP8266 development board.
There are several ESP8266 boards available, usually numbered ESP-01 through ESP-12. Check the pins of the actual board you order with the information from your source as the rapid development of these products has led to confusion and duplication of board identification numbers. 15 for a complete board with USB to serial and 3. The ESP-01 is a simple board to start with. The ESP-12 is popular because of its size and the number of pins brought to the side of the board.
The ESP8266 runs on anything from 2. 5 volts, so a couple of AA batteries will work. Most of us use a 3. Maximum current draw is 300 mA, so use a supply that can supply 500 mA to be safe. A weak or poor quality supply will cause the board to reset unexpectedly and make debugging difficult. It is possible to level convert if you already have a 5 volt adapter.
The NodeMCU Development Board has the USB to serial interface on the board. When you receive your adapter, verify that the actual voltage output is 3. 3 volts as some cheap adapters have been found to be mislabelled. What do I need to download? The ESP8266 board you bought may have one of many different firmware versions on it.