NodeMCU D1mini ESP8266

- The NodeMCU is an open-source firmware and development kit that helps you to prototype your IoT product within a few Lua script lines. Formore details, please visit

www.nodemcu.com, and https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en

Lowest cost WI-FI

- Less than $2 WI-FI MCU ESP8266 integrated and esay to prototyping development kit.

Specification

- The Development Kit based on ESP8266, integrates GPIO, PWM, IIC, 1-Wire and ADC all in one board.
- USB-TTL included, plug&play
- 10 GPIO, every GPIO can be PWM, I2C, 1-wire
- PCB antenna

Mini NodeMCU ESP8266 Development Board £3.50 ebay

Connect to the wireless network

print(wifi.sta.getip())

--nil

wifi.setmode(wifi.STATION)

wifi.sta.config("SSID","password")

print(wifi.sta.getip())

--192.168.18.110

Connect to the wireless network

print(wifi.sta.getip())--nil wifi.setmode(wifi.STATION) wifi.sta.config("SSID","password") print(wifi.sta.getip())--192.168.18.110

HTTP Client

-- A simple http client conn=net.createConnection(net.TCP, false) conn:on("receive", function(conn, pl) print(pl) end) conn:connect(80,"121.41.33.127") conn:send("GET / HTTP/1.1\r\nHost: www.nodemcu.com\r\n" .."Connection: keep-alive\r\nAccept: */*\r\n\r\n")

WeMos D1 mini setup in the arduino IDE

http://arduino.esp8266.com/stable/package_esp8266com_index.json

NOTE if the above fails to load try this

https://github.com/esp8266/Arduino/releases/download/2.3.0/package_esp8266com_index.json

http://www.esp8266learning.com/wemos-webserver-example.php

or Website code here

Over The Air (OTA) WiFi updating

ONCE working Over The Air (OTA) reprogramming can be used to upload or change the program

Python 2.7 is needed

https://github.com/G6EJD/ESP8266-Over-The_air-OTA-Updating

NOTE 1: If you do not get a Tools Port network address it may be Win10 needs to enable Multicast

NOTE 2: If the Arduino will not load libraries; it may be Win10 needs to enabled by typing the following in a command prompt : setx _JAVA_OPTIONS -Djava.net.preferIPv4Stack=true

OTA Boot loader sketch

#include <ESP8266WiFi.h>

#include <ESP8266mDNS.h>

#include <WiFiUdp.h>

#include <ArduinoOTA.h>

// NOTES

// the D1 mini must have been programed to receive OTA (SEE D1_mini_OTA)

// To send OTA use Tools to select Port as used by ArduinoOTA.setHostname

// A password may have been set in the OTA code ArduinoOTA.setPassword

const char* ssid = "PLUSNET-X7XQ";

const char* password = "d35d396ea6";

const char* host = "esp8266-339f2a";

OTA example sketch

#include <ESP8266WiFi.h>

#include <ESP8266mDNS.h>

#include <WiFiUdp.h>

#include <ArduinoOTA.h>

// NOTES

// the D1 mini must have been programed to receive OTA (SEE D1_mini_OTA)

// To send OTA use Tools to select Port as used by ArduinoOTA.setHostname

// A password may have been set in the OTA code ArduinoOTA.setPassword

const char* ssid = "PLUSNET-X7XQ";

const char* password = "d35d396ea6";

const char* host = "esp8266-339f2a";

int led_pin = 13; // GPIO13 D7

unsigned long previousMillis = 0; // will store last time LED was updated

long interval = 1000; // interval at which to blink (milliseconds)

int ledState = LOW; // ledState used to set the LED

const int analogInPin = A0; // ESP8266

int sensorValue;

#define N_DIMMERS 3

int dimmer_pin[] = {14, 5, 15}; // D5, D1, D8

void setup() {

Serial.begin(115200);

pinMode(LED_BUILTIN, OUTPUT);

/* switch on led */

pinMode(led_pin, OUTPUT);

digitalWrite(led_pin, LOW);

Serial.println("");

Serial.println("Booting");

WiFi.mode(WIFI_STA);

WiFi.begin(ssid, password);

while (WiFi.waitForConnectResult() != WL_CONNECTED){

WiFi.begin(ssid, password);

Serial.println("Retrying connection...");

}

/* switch off led */

digitalWrite(led_pin, HIGH);

/* configure dimmers, and OTA server events */

analogWriteRange(1000);

analogWrite(led_pin,990);

for (int i=0; i<N_DIMMERS; i++)

{

pinMode(dimmer_pin[i], OUTPUT);

analogWrite(dimmer_pin[i],50);

}

ArduinoOTA.setHostname(host);

ArduinoOTA.onStart([]() { // switch off all the PWMs during upgrade

for(int i=0; i<N_DIMMERS;i++)

analogWrite(dimmer_pin[i], 0);

analogWrite(led_pin,0);

});

ArduinoOTA.onEnd([]() { // do a fancy thing with our board led at end

for (int i=0;i<30;i++)

{

analogWrite(led_pin,(i*100) % 1001);

delay(50);

digitalWrite(LED_BUILTIN, LOW); // Turn the LED on noting the LED needs a pin to be low for it to illuminate

delay(100); // Wait for a time

digitalWrite(LED_BUILTIN, HIGH); // Turn the LED off by making the pin HIGH

delay(100); // Wait for a time

}

});

// Add support for OTA

ArduinoOTA.onError([](ota_error_t error) { ESP.restart(); });

/* setup the OTA server */

ArduinoOTA.begin();

// ----- Sketch as normal from here -----

Serial.println("Ready");

}

void loop() {

ArduinoOTA.handle(); // Add support for OTA

// ----- Sketch as normal from here -----

// Try to avoid delays in code so OTA updates are received OK

//--- loop to blink without delay ---

// example code not using delay to flash an LED

unsigned long currentMillis = millis();

if (currentMillis - previousMillis >= interval) {

// save the last time you blinked the LED

previousMillis = currentMillis;

// if the LED is off turn it on and vice-versa:

ledState = not(ledState);

// set the LED with the ledState of the variable:

digitalWrite(LED_BUILTIN, ledState);

sensorValue = analogRead(analogInPin); // read the Pot connected to A0

interval = sensorValue +20; // set the LED flash rate from the Pot value

}

LINKS

D1 mini Alexa Control

ESP-NOW - Peer to Peer ESP32 Network

Page updated

Google Sites

Report abuse