Hey world!
I've got a basic smart-home project that measures air temp/humidity running on an Arduino Uno WiFi Rev2. I've figured out how to setup a network entry-point on it, as well as a server site running on the IP, but I'm not quite sure how to connect to an app, specifically for iOS.
As far as my code goes, it is the generic WiFiNINA library example provided by the Arduino IDE, and some that reads the temp and displays it on an LCD. Nothing out of the ordinary.
#include <WiFiNINA.h>
#include <utility/wifi_drv.h>
char ssid[] = "wifi"; // your network SSID (name)
char pass[] = "password"; // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0; // your network key Index number (needed only for WEP)
int led = LED_BUILTIN;
int status = WL_IDLE_STATUS;
WiFiServer server(80);
void setup() {
WiFiDrv::pinMode(25, OUTPUT); //GREEN
WiFiDrv::pinMode(26, OUTPUT); //RED
WiFiDrv::pinMode(27, OUTPUT); //BLUE
//Initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("Access Point Web Server");
pinMode(led, OUTPUT); // set the LED pin mode
WiFiDrv::digitalWrite(26, HIGH);
// check for the WiFi module:
if (WiFi.status() == WL_NO_MODULE) {
Serial.println("Communication with WiFi module failed!");
// don't continue
while (true);
}
String fv = WiFi.firmwareVersion();
if (fv < WIFI_FIRMWARE_LATEST_VERSION) {
Serial.println("Please upgrade the firmware");
}
// print the network name (SSID);
Serial.print("Creating access point named: ");
Serial.println(ssid);
// Create open network. Change this line if you want to create an WEP network:
status = WiFi.beginAP(ssid, pass);
if (status != WL_AP_LISTENING) {
Serial.println("Creating access point failed");
// don't continue
while (true);
}
// wait 10 seconds for connection:
delay(10000);
// start the web server on port 80
server.begin();
WiFiDrv::digitalWrite(25, HIGH); // for full brightness
// you're connected now, so print out the status
printWiFiStatus();
}
void loop() {
// compare the previous status to the current status
if (status != WiFi.status()) {
// it has changed update the variable
status = WiFi.status();
if (status == WL_AP_CONNECTED) {
// a device has connected to the AP
Serial.println("Device connected to AP");
} else {
// a device has disconnected from the AP, and we are back in listening mode
Serial.println("Device disconnected from AP");
}
}
WiFiClient client = server.available(); // listen for incoming clients
if (client) { // if you get a client,
Serial.println("new client"); // print a message out the serial port
String currentLine = ""; // make a String to hold incoming data from the client
while (client.connected()) { // loop while the client's connected
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println();
// the content of the HTTP response follows the header:
client.print("Click <a href=\"/H\">here</a> turn the LED on<br>");
client.print("Click <a href=\"/L\">here</a> turn the LED off<br>");
int randomReading = analogRead(A1);
client.print("Random reading from analog pin: ");
client.print(randomReading);
// The HTTP response ends with another blank line:
client.println();
// break out of the while loop:
break;
}
else { // if you got a newline, then clear currentLine:
currentLine = "";
}
}
else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
// Check to see if the client request was "GET /H" or "GET /L":
if (currentLine.endsWith("GET /H")) {
digitalWrite(led, HIGH); // GET /H turns the LED on
}
if (currentLine.endsWith("GET /L")) {
digitalWrite(led, LOW); // GET /L turns the LED off
}
if(currentLine.endsWith("GET /N")) {
//Connect to network
client.print("Enter WiFi info: <br> ");
}
}
}
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
void printWiFiStatus() {
// print the SSID of the network you're attached to:
Serial.print("SSID: ");
Serial.println(WiFi.SSID());
// print your WiFi shield's IP address:
IPAddress ip = WiFi.localIP();
Serial.print("IP Address: ");
Serial.println(ip);
// print where to go in a browser:
Serial.print("To see this page in action, open a browser to http://");
Serial.println(ip);
}
I know that they will have to be on the same WiFi network eventually, I'm working on that, but how will I do the data transmission?
Note that I've already seen stuff like BLExAr etc. but they aren't what I want -- an app developed by me connecting to my Arduino. Perhaps Bluetooth would be a better way to go?
Cheers!