SoftwareSerial response is semi-gibberish using ESP8266

Question

I have a working SoftwareSerial connection to my ESP8266 module on my Arduino UNO board. However, the response I get from the ESP8266 using the SoftwareSerial library is semi-gibberish.

So I do get the correct response, but some characters are changed. For example when I ask the IP of the module, it sometimes returns the right IP, but most of the times just alters the IP, for example 092.168/123.5.

So what am I doing wrong?

This is the code I'm currently using:

#include <SoftwareSerial.h>
SoftwareSerial esp8266(10, 11);
void setup() {
 Serial.begin(115200);
 while (!Serial) {
 ; // wait for serial port to connect. Needed for native USB port only
 }
 Serial.println("Started");
}
void loop() {
 if (esp8266.available()) {
 Serial.println(esp8266.readStringUntil("\n"));
 }
 if (Serial.available()) {
 esp8266.write(Serial.read());
 }
}

When I send the AT command, I sometimes get OK□しろいしかく or some other extra random characters.

So how do I make the SoftwareSerial show (or receive) the correct response?

• gre_gor: You never call begin on software serial.
• AltAir: How do you convert logic level Arduino UNO (5V) and ESP8266 (3.3V)?
• Mason: @AltAir, I don't, the board accepts a logic level of 5V

Answer 1

Try lowering your baudrate to 9600.

https://blogs.msdn.microsoft.com/abhinaba/2016/01/23/esp8266-wifi-with-arduino-uno-and-nano/

• Mason: Thank you, however I tried chaning the baudrate to 9600 by sending AT+IPR=9600 but I couldn't talk to it on rate 9600. I can't talk to it on any rate anymore... So what would the best way be to change that modules baud rate?
• per1234: You need to send that command at the baud rate the ESP8266 is expecting. The default is 115200.
• Mason: The command I used AT+IPR=9600 bricked the flash, but I tried it on a different ESP8266, used the AT+CIOBAUD=9600 and everything started to work! I can now read it without any gibberish, thanks!