Cannot exit function

Hey guys,

For some reason, I cannot seem to exit the following function and return to void loop() or void setup() (both loops can call this function). I’ve played around with it for hours to no avail.

void getCredentials() {
  WiFiClient client = server.available();

  //if device is connected, host credentials page
  if (client) {
    Serial.println("new client");
    String currentLine = "";
    String httpStr = "";
    bool readingJSON = false;
    while (client.connected()) {
      if (client.available()) {
        char c =;
        //if JSON string recieved, deserialize and connect to wifi (getWiFi())
        if (c == '{') {
          readingJSON = true;
        if (readingJSON) {
          httpStr += c;
        if (c == '}') {
          readingJSON = false;
          Serial.println("Deserializing JSON");
          const int capacity_in = JSON_OBJECT_SIZE(10);
          StaticJsonDocument<capacity_in> doc;
          deserializeJson(doc, httpStr);
          String ssid = doc["ssid"].as<String>();
          String pass = doc["pass"].as<String>();
          ssid.toCharArray(wifi.ssid, 256);
          pass.toCharArray(wifi.pass, 256);
          Serial.print("SSID: ");
          Serial.print("Password: ");
          needCredentials = false;
          Serial.println("Credentials stored");
          Serial.println("Connection achieved");
          return; //exit function after connecting to wifi
        if (c == '\n') {
          if (currentLine.length() == 0) { //if nothing recieved by server (arduino), host html page

            client.println("<!doctype html>");
            client.println("<title>PotBot Setup</title>");
            client.println("<style type=\"text/css\"> body {margin:50px; padding:20px; line-height: 250% } </style>");
            client.println("<body style=\"background-color:#43642B;font-family:sans-serif;color:Gray\">");
            client.println("<style type=\"text/css\"> form {margin:50px; padding:20px; line-height: 250% } </style>");
            client.println("<form style=\"background-color:#91C16E;color:DarkSlateGray\";>");
            client.println("<h1>Wifi Setup</h1>");
            client.print("<h2>Network Name:</h2>");
            client.print("<input type=\"text\" name=\"network\" id=\"network\">
"); //ssid input
            client.print("<input type=\"password\" name=\"password\" id=\"password\">
"); //password input
            client.print("<button onClick=\"sendText()\" value=\"Submit\">Submit</button>"); //execute sendText() function on sumbit
            client.println("var network = document.querySelector('#network');"); //get ssid from form
            client.println("var password = document.querySelector('#password');"); //get password from form
            client.println("function sendText() {");
            client.println("nocache=\"&nocache=\" + Math.random() * 1000000;");
            client.println("var request =new XMLHttpRequest();"); 
            client.println("var obj = {" //consolidate ssid and password into javascript object
                           "ssid: network.value,"
                           "pass: password.value};"
            client.println("var str = JSON.stringify(obj);"); //convert object to json string
            client.println("\"POST\", \"server\");");
            client.println("request.send(str);"); //send json string
          else {
            currentLine = "";

        else if (c != '\r') {
          currentLine += c;


It should execute a return after the JSON string is deserialized and the getWiFi() function is called. I know it gets past the getWiFi() function because I have it set to serial print “connection achieved” after calling the getWiFi() function, which it does. However, it seems to stop immediately after that.

Any help would be appreciated. I’ve spent an ungodly amount of time trying to troubleshoot this.

Please post your full sketch.

If possible, you should always post code directly in the forum thread as text using code tags:

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Maybe change this

while (client.connected()) {

to this

if (client.connected()) {