IO and ADC Expansion Baseboard with LCD user buttons and NodeMCU ESP-12E (ESP8266) Wi-Fi Module for Electronic Circuit Prototyping and New Product Development

EBS-G baseboard adds missing functionality to the popular NodeMCU Wi-Fi module, which has very limited general purpose digital IO and ADC inputs. When the NodeMCU is used on the board the entire left side of the module is replaced with useful digital IOs and ADC inputs. The IO and ADC are then available through the SPI interface of the NodeMCU and can be used for circuit control and data acquisition applications in IOT products. The IO expansion circuits are implemented on the bottom side of the EBS-G board. 16-pin straight sockets are provided for connection of test pins or for using the prototyping circuit boards PRT-B and PRT-C series.
A high-definition OLED display is attached to the IIC bus of the NodeMCU and can be used to show text and imaged during in the application.
Two tactile switches (aka buttons) are also provided for general use. The buttons are read by P7 and P6 ports of the IO extender IC. 

This board comes with one NodeMCU module and it is completely assembled.

Example code and libraries can be downloaded from the GIT repository at this link:

https://github.com/gkrast/SC_CTRL_DEMO

Features

·         Expands the IO and ADC capability of the standard NodeMCU ESP-12E (ESP8266) Wi-Fi module

·         Adds 4-channel 10-bit ADC MCP3004 with SPI interface and up to 200ksps conversion rate

·         The ADC voltage reference can be 3.3V internal or external

·         Provided 8-channel digital IO port with Microchip’s MCP23S08

·         Available option for digital IO interrupt on change event

·         High-Definition OLED display

·         Two general purpose User buttons

• Free example application code and MCP3004 / MCP23S08 libraries