Serial read SSID and PASSWORD WiFI connection failed in ESP32

Question

Trying to get Wifi SSID and password dynamically from serial monitor and connecting to WiFi, tried the below program, but wifi is always in Connecting state only, it is not getting connected after receiving input from serial monitor.

#include <WiFi.h>
#define BAUDRATE 115200
char ssid[50];
char pass[50];
void setup() {
 Serial.begin(BAUDRATE);
 Serial.println();
 Serial.print("Enter your WiFi credentials.\n");
 Serial.print("SSID: ");
 while (Serial.available() == 0) {
 // wait
 }
 Serial.readBytesUntil(10, ssid, 50);
 Serial.print(ssid);
Serial.print("donessid");
 Serial.print("PASS: ");
 while (Serial.available() == 0) {
 // wait
 }
 Serial.readBytesUntil(10, pass, 50);
 Serial.print(pass);
 Serial.print("donepass");
 WiFi.begin(ssid, pass);
 while (WiFi.status() != WL_CONNECTED) {
 delay(500);
 Serial.print("Connecting....");
 }
 Serial.println("");
 Serial.println("WiFi connected");
 Serial.println("IP address: ");
 Serial.println(WiFi.localIP());
}
void loop()
{}

• Majenko: And what results do you actually get on the serial monitor?
• Rangesh. s: Hi Majenko, I got a result like this image.see this screenshot.. imgdb.in/gJ6K
• Majenko: You really should learn to use println() so you don't get everything on one line. I suspect your problem is that you have your line ending set to CR & NL but you're only looking for NL (10) so you get extra character 13s in your strings.

Answer 1

Is your Serial Monitor setting set to "Both NL and CR"? Change it to "Newline" should works.

What happened is if your Serial Monitor has a setting of "Both NL and CR", when your press Enter, it generates a \r\n, the Serial.readBytesUntil(10, ssid, 50) picked up that \r at the end of the array, when you use it as SSID, it is not a valid SSID.

• Rangesh. s: Thanks hcheung.. it worked.
• hcheung: Glad I this help. Appreciated if you could accept the answer by click on the tick on the left side of the answer.