NexBrd’s documentation¶
Overview¶
Overview¶
Setup¶
Arduino¶
Setting up NexBrd on Arduino is as easy as 1,2,3!
Step 1: Download and Install the latest Arduino from here
Step 2:
Go to File>Preference and add http://thenexio.com/boards/nexbrd/v1/package_thenexio.com_index.json
to the Additional Boards Manager.
Step 3: Go to Tools>Board>Boards Manager, and install NexBrd v1.0.
You are ready to Develop your Internet of Things, THING!
Example Projects¶
Blinky¶
The basic blinky program.
1 2 3 4 5 6 7 8 9 10 11 12 13 | void setup() {
// This code block runs only once, ie: it is the setup code
pinMode(D1,OUTPUT); //Set the pin D1 to output
}
void loop() {
digitalWrite(D1,LOW); //Set the pin D1 to LOW ie 0v
delay(1000); //Wait for 1 sec(1000 ms) by creating a delay
digitalWrite(D1,HIGH); //Set the pin D1 to HIGH ie 3.3v
delay(1000);
}
|
Server based blinky¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | #include <ESP8266WiFi.h>
//Enter your WiFi credentials here
const char* ssid = "*******";
const char* password = "*****";
int ledPin = D1;
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
// Connect NexBRD to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Begin server on NexBRD
server.begin();
Serial.println("Server started");
// Print the IP address of NexBRD
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
int value = LOW;
if (request.indexOf("/LED=ON") != -1) {
digitalWrite(ledPin, HIGH);
value = HIGH;
}
if (request.indexOf("/LED=OFF") != -1) {
digitalWrite(ledPin, LOW);
value = LOW;
}
// Set ledPin according to the request
digitalWrite(ledPin, value);
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.println("<html>");
client.println("Hi from NexBRD");
client.print("<br><br>Led pin is now: ");
if(value == HIGH) {
client.print("On");
} else {
client.print("Off");
}
client.println("<br><br>");
client.println("<a href=\"/LED=ON\"\"><button>Turn On </button></a>");
client.println("<a href=\"/LED=OFF\"\"><button>Turn Off </button></a><br />");
client.println("</html>");
delay(1);
Serial.println("Client disonnected");
Serial.println("");
}
|
ADC data on Server¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | #include <ESP8266WiFi.h>
//Enter your WiFi credentials here
const char* ssid = "****";
const char* password = "****";
int ledPin = 5; // GPIO13
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
// Connect to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
server.begin();
Serial.println("Server started");
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
float value =analogRead(A0);
Serial.println(value);
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Refresh: 5"); // This line tells the browser to refresh every 5 seconds
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
client.print("analog input ");
client.print(" is ");
client.print(value);
client.println("<br />");
client.println("</html>");
Serial.println("Client disonnected");
Serial.println("");
}
|
Data logging to SD Card¶
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | #include <SPI.h>
#include <SD.h>
File myFile;
void setup() {
// Open serial communications of NexBRD and wait for port to open:
Serial.begin(115200);
while (!Serial) {
;
}
Serial.print("Initializing SD card...");
if (!SD.begin(4)) {
Serial.println("initialization failed! Check if SD card properly mounted on NexBRD");
return;
}
Serial.println("initialization done.");
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile = SD.open("test.txt", FILE_WRITE);
// if the file opened okay, write to it:
if (myFile) {
Serial.print("Writing to test.txt...");
myFile.println("testing 1, 2, 3.");
// close the file:
myFile.close();
Serial.println("done.");
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
// re-open the file for reading:
myFile = SD.open("test.txt");
if (myFile) {
Serial.println("text.txt:");
// read from the file until there's nothing else in it:
while (myFile.available()) {
Serial.write(myFile.read());
}
// close the file:
myFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
void loop() {
// nothing happens after setup
}
|
Serving html code from SD Card¶
You can download the required htm (yes, its htm not html) files from here: index.htm on.htm off.htm
PLEASE CHANGE THE FILE EXTENSION FROM .txt to .htm
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | #include <ESP8266WiFi.h>
#include <SPI.h>
#include <SD.h>
File myFile;
const char* ssid = "*******";
const char* password = "*********";
int ledPin = 5; // GPIO13
WiFiServer server(80);
void setup() {
Serial.begin(115200);
delay(10);
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
// Connect NexBRD to WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
// Begin server on NexBRD
server.begin();
Serial.println("Server started");
// Print the IP address of NexBRD
Serial.print("Use this URL to connect: ");
Serial.print("http://");
Serial.print(WiFi.localIP());
Serial.println("/");
if (!SD.begin(4)) {
Serial.println("initialization failed! Check if SD card properly mounted on NexBRD");
return;
}
Serial.println("initialization done.");
}
void loop() {
// Check if a client has connected
WiFiClient client = server.available();
if (!client) {
return;
}
// Wait until the client sends some data
Serial.println("new client");
while(!client.available()){
delay(1);
}
String request = client.readStringUntil('\r');
Serial.println(request);
client.flush();
int value = LOW;
if (request.indexOf("/on.htm") != -1) {
digitalWrite(ledPin, HIGH);
value = HIGH;
}
if (request.indexOf("/off.htm") != -1) {
digitalWrite(ledPin, LOW);
value = LOW;
}
// Set ledPin according to the request
digitalWrite(ledPin, value);
// Return the response
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println(""); // do not forget this one
client.println("<!DOCTYPE HTML>");
myFile = SD.open("index.htm");
if (myFile) {
Serial.println("index.htm:");
// read from the file until there's nothing else in it:
while (myFile.available()) {
client.write(myFile.read());
}
// close the file:
myFile.close();
}
delay(1);
Serial.println("Client disonnected");
Serial.println("");
}
|
OTA updates¶
Coming soon
Sleep mode¶
coming soon
IFTTT Integration¶
coming soon
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