Hi,
I’m slowly getting to work on an IoT project involving a WiFi client and am trying to write my own libraries to make for a cleaner implementation. Full disclosure: I'm a beginner!
I am using Adafruit’s ItsyBitsy M4 and the ATWINC1500 breakout with the WiFi101 library and all is going great when everything is in a single file. However, I want to be able to modularise my code by its purpose into classes which for the most part has been successful. I can then pass pointers (*) of the connected hardware (i.e. NeoPixel and Uart for serial ports) to the classes "set" method. Though, I have been unable to do this with the WiFiClass and WiFiClient classes.
I’ve had a go at passing the WiFi and WiFiClient to my classes as a pointer (see code below), in the same way I have successfully done it with Uart Classe for my serial ports (though I have to use -> and not . for methods). The issue is, whilst I am able to determine (what I believe to be) the current client status, no data is ever returned in my loop(). I have getter and setter methods to get/set the WiFiClient pointer, yet there’s no data when I use them.
It also seems that WiFiClass (the WiFi object) is being automatically created when the sketch starts which makes me uncomfortable as I haven't declared it anywhere.
My questions:
- Is there any way to explicitly declare a
WiFiClassand initialise a custom WiFi101 connection, as opposed to using the defaultWiFiclass provided by the library? For clarity I like to see where things are initialised and not just accept that they have been. - Is it actually possible for me to pass the
WiFiClientclass through to my own classes and have all classes use the same single instance back inmain.cppvia pointers?
Below is what I have tried so far:
NetworkInterface class
(originally designed to hold the entire instantiated WiFi class, but currently just using WiFiClient):
// network-interface.cpp:
WiFiClient NetworkInterface::getNetworkClient() {
return *_networkClient;
}
byte NetworkInterface::setNetworkInterface(WiFiClient *newNetworkInterface, interfacetype_t mode) {
if (mode >= 0 && mode <= 3) {
networkMode = mode;
} else {
networkMode = -1; // TODO: Use enum
return -1;
}
_networkClient = newNetworkInterface;
return mode;
}
// .header file:
#ifndef NETWORKINTERFACE_H
#define NETWORKINTERFACE_H_
#include "Arduino.h"
typedef enum {
INTERFACETYPE_WIFI = 0,
INTERFACETYPE_ETH = 1,
INTERFACETYPE_BT = 2,
INTERFACETYPE_UNSUPPORTED = -1
} interfacetype_t;
class NetworkInterface {
public:
bool connectToSSID(byte ssid[], byte password[]);
bool getConnectionStatus();
bool disconnectFromNetwork();
interfacetype_t getNetworkMode();
WiFiClient getNetworkClient();
byte setNetworkInterface(WiFiClient *newNetworkInterface, interfacetype_t mode); // 26.01.2019 - LIMITED TO WiFICLIENT, UNSURE ABOUT WiFiClass
private:
interfacetype_t networkMode;
WiFiClient *_networkClient;
};
#endif
main class:
// main.cpp:
#include <SPI.h>
#include <WiFi101.h>
#include "arduino_secrets.h"
#include "network-interface.h"
char ssid[] = SECRET_SSID; // your network SSID (name)
char pass[] = SECRET_PASS; // 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 status = WL_IDLE_STATUS;
char server[] = "www.google.com"; // name address for Google (using DNS)
WiFiClient client;
NetworkInterface networkInterface;
void setup() {
//Initialize serial and wait for port to open:
Serial.begin(9600);
while (!Serial);
Serial.println("= = = Simple Client-Server Test = = = ");
WiFi.setPins(A5, A4, A3, A2);
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
while (true);
}
// attempt to connect to WiFi network:
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network. Change this line if using open or WEP network:
status = WiFi.begin(ssid, pass);
// wait for connection
delay(2000);
}
Serial.println("Connected to wifi");
printWiFiStatus();
Serial.println("\nStarting connection to server...");
/*
Pass the network client (and hopefully soon WiFi class with hardware connection data) to NetworkInterface class
TODO: IMPLEMENT ENUM FOR INTERFACE TYPES
*/
networkInterface.setNetworkInterface(&client, 0);
...
}
void loop() {
// if there are incoming bytes available
// from the server, read them and print them:
WiFiClient myClient = networkInterface.getNetworkClient();
if (myClient.available()) {
Serial.print("\n==================================\n");
Serial.print("| REMOTE :: Server Has Responded: |");
Serial.print("\n----------------------------------\n");
while (myClient.available()) {
char c = myClient.read();
Serial.write(c);
}
Serial.print("\n==================================\n");
}
// if the server's disconnected, stop the myClient:
if (!myClient.connected()) {
Serial.println();
Serial.println("CLIENT :: Disconnecting");
myClient.stop();
// do nothing forevermore:
while (true);
}
}
void makeTestCallToPusher() {
char serverURLTest[] = "192.168.2.4";
WiFiClient myClient = networkInterface.getNetworkClient();
if (myClient.connect(serverURLTest, 80)) {
Serial.print("CLIENT :: Connected - ");Serial.print(serverURLTest);Serial.print("\n");
myClient.println("GET /test HTTP/1.1");
myClient.println("Upgrade: WebSocket");
myClient.println("Connection: Upgrade");
myClient.println("Origin: ARDUINO_TEST");
myClient.println("Host: eu");
myClient.println("Connection: close");
myClient.println();
}
}
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 the received signal strength:
long rssi = WiFi.RSSI();
Serial.print("signal strength (RSSI):");
Serial.print(rssi);
Serial.println(" dBm");
}