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ATmega328 and for ESP8266 Arduino board

RobotDyn UNO+WIFI R3  is a customized version of the classic ARDUINO UNO R3 board which has two Processors: Atmel ATmega328 microcontroller and ESP8266 WiFi chip with 8 MB flash memory. Each processor has its own pinout headers. The board also has USB-TTL converter based on CH340G on same board.

The convenient solution for the development of new projects requiring Uno and WiFi. Via USB you can update sketches and firmware for ATmega328 and for ESP8266. The board has DIP-switch, to connect the processors.

Features

  • Two CPUs: ATMEGA328P (8-Bit) and ESP8266 (32-Bit)
  • 8mb ESP8266 Flash Memory
  • External U.FL Antenna Connector for WiFi
  • Micro USB connection
  • Power jack, 7-12V power input.
  • Compatible with Arduino
  • Compatible with nodemcu
  • Can be used with existing Arduino Shields

 

Specifications

Microcontrollers 1x ATMEGA328P and 1x ESP-8266EX
Operating Voltage 5V for ATMEGA328P and 3.3V for ESP8266
Digital I/O Pins 13 for ATMEGA328P (5v compliant)+ 8 for ESP8266 (3.3V compliant)
Analog Input Pins 6 for ATMEGA328P (5V compliant) + 1 for ESP8266 (3.3V compliant)
Clock Speed 16MHz for ATMEGA328P and 80MHz/160MHz for ESP8266
ESP8266 Flash 8M bytes

 

The key for operation is the dip switches, here are the combinations

 

Connection

DIP

1

2

3

4

5

6

7

ATmega328<->ESP8266

ON

ON

OFF

OFF

OFF

OFF

OFF

USB <->ATmega328

OFF

OFF

ON

ON

OFF

OFF

OFF

USB<->ESP8266 (Update firmware or sketch)

OFF

OFF

OFF

OFF

ON

ON

ON

USB<->ESP8266 (communication)

OFF

OFF

OFF

OFF

ON

ON

OFF

All independent

OFF

OFF

OFF

OFF

OFF

OFF

OFF

Initially I had difficulty uploading a sketch but these settings work with regards the dip switch, I selected an Arduin/Genuino Uno

CH340 connect to ATmega328 (upload sketch) OFF OFF ON ON OFF OFF OFF NoUSE

Code

This was a modified version of the blink sketch, only difference is that I had an LED connected to D6

void setup() 
{
  pinMode(6, OUTPUT);
}
 
// the loop function runs over and over again forever
void loop() 
{
  digitalWrite(6, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(6, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

 

Links

http://robotdyn.com/downloads/comp_docs/CH340/CH341SER.ZIP

http://robotdyn.com/downloads/comp_docs/CH340/CH340_driver_instruction.pdf

PINOUT=UNO+WiFi-R3-AT328-ESP8266-CH340G.pdf

 

Purchase

UNO+WiFi R3 ATmega328P+ESP8266 (32Mb memory), USB-TTL CH340G. Compatible for Arduino Uno, NodeMCU, WeMos ESP8266

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