ESP8266 Community Forum

Hello,

This new board is just a simple ESP8266 Board with USB + Extension Bus (nEXT) and is the result of looking for a smaller and somehow a more flexibile hardware configuration than the CBDB Evolution DevBoard.

This is how is looking the PCB of it:


and the finished Board:


This is the board that was also used for the long run battery tests posted here:
Ultra low power application schematic: RFC
In this case on top of it was added the RTC/Li-Ion battery charger nEXT module.

For more details about, please see related articles:

CBDB nEXT Evo Board - General presentation and schematics

CBDB nEXT Evo - Firmware upload and first run tests

And the first Extension board, if you didn't see it yet, this is AN1, the ANALOG ADC/DAC + I/O Board for CBDB nEXT EVO: http://www.esp8266-projects.com/2015/12/p3-esp8266-next-evo-analog-extension.html.

Also can be directly used with any other MCU, Arduino, ARM, etc as long as it has a I2C bus and 3V logic.

Basic default functions of the CBDB nEXT AN1 Extension Board:

INPUT : 0-40V Autorange Analog frontend / 18 Bit ADC
OUTPUT : 4x12 BIT DAC
TEMPERATURE : I2C Temperature sensor, standard or high precision options
I/O: 8 Bit I/O Expansion Port

And a Graphical Display option for it

My first option for a Alphanumeric Display still remain the ST7032i LCD one, but as I was looking also for a Graphical Display option, I found this SSD1306 OLED as a easy to use one with the CBDB nEXT EVO Board.





Original article about http://www.esp8266-projects.com/2015/12/mailbag-ssd1306-oled-display-for.html

The SAGA Continues: Part 2 of the ESP8266 nEXT EVO Analog Extension Board (AN1)

In this part we will talk a bit about the nEXT Bus I²C protocol and we will start also a longer, multi-part discussion about testing procedures and software programming for the AN1 Board devices and functions (I/O Expansion port, Temperature, ADC, DAC, Voltage measurements,etc.



Any related comments, suggestions, ideas are warmly welcomed



Thank you,
TJ.