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**This is an old revision of the document!**

Table of Contents

Node MCU

Node MCU who provides the LUA firmware also propose evaluation boards:


An Arduino + ESP-01 board, with an ATMega 644:

ATMega 644 has two hardware serial ports

Olimex ESP8266-EVB EValuation Board

ESP8266-EVB is Evaluation board for ESP8266 with relay, button, UEXT, all GPIOs available on 0.1“ header

AI-Thinker 'Test Board'

The AI-Thinker board is an evaluation board with an onboard STC15L204EA microcontroller along with a relay, buttons and LEDs on all GPIOs, a relay, a buzzer, LDR, a socket for NRF240 modules, CH340 USB to Serial converter and DIP switches allowing different IO routing configurations to be setup. A small adapter board connects the normal ESP8266 modules to a pair of 2×4 headers. The board is widely available from a number of Chinese vendors.

DIP Switches

Serial Data Switch

This is the left-most switch when the USB port is at top. Controls routing of the serial data lines.

No. Label Function
1 DCRON ON=Connect ESP TX line to MCU RX line.
2 DCTON ON=Connect ESP RX line to MCU TX line.
3 ESPTON ON=Connect ESP TX line to CH340.
4 MCUTON ON=Connect MCU TX line to CH340.
5 ESPRON ON=Connect ESP RX line to CH340.
6 MCU_R_ON ON=Connect MCU RX line to CH340.

So, to achieve the following standard configurations set the dip switch as follows:

Configuration 1 2 3 4 5 6
MCU connected to CH340 OFF OFF OFF ON OFF ON
ESP8266 connected to CH340 OFF OFF ON OFF ON OFF
MCU connected to ESP8266 ON ON OFF OFF OFF OFF
esp8266-test-boards.1426173133.txt.gz · Last modified: 2015/03/12 15:12 by geezus