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Can not initialize ESP module in Arduino SoftwareSerial's example sketch in configuring WiFi module.

In the sketch it tells:

#include "WiFiEsp.h"
// Emulate Serial1 on pins 6/7 if not present
#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
SoftwareSerial Serial1(11,12); // RX, TX
#endif

I plugged jumper wires in from esp8266 RX to Digital 11 of mega which is RX and TX of esp8266 to Digital 12 of mega, and I compile the code and looked at the Serial Monitor, but it says:

[WiFiEsp] Initializing ESP module
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] >>> TIMEOUT >>>
[WiFiEsp] Cannot initialize ESP module

Advise is greatly appreciated.

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2
  • 2
    it is not SoftwareSerial on Mega. Mega has Serial1. did you connect ground? connect Rx to TX and TX to RX. use pins of hardware Serial1 of Mega Commented Feb 9, 2018 at 12:46
  • Yes i connect the ground, my esp01 responds if the connection is RX of esp01 to TX of mega and TX of esp01 to RX of mega. Commented Feb 9, 2018 at 13:43

1 Answer 1

Reset to default
1 
#ifndef HAVE_HWSERIAL1
#include "SoftwareSerial.h"
SoftwareSerial Serial1(11,12); // RX, TX
#endif

Because your Mega has a Hardware Serial1 port, HAVE_HWSERIAL1 is defined. Thus the lines inside that preprocessor conditional will not be compiled. This means you should connect the ESP8266 to the Serial1 lines on your Mega:

Mega | ESP8266
--------------
19   | TX
18   | RX
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6
  • I try to plug it in mega's 18 with esp01's TX and 19 with esp01's RX and reverse but still gives me time out :( i don't know what to do now. Commented Feb 9, 2018 at 13:49
  • And also it gives me :error compiling for board arduino /genuino mega or mega2560. please sir help. Commented Feb 9, 2018 at 13:59
  • 1
    first of all the sketch with WiFiEsp library must compile. what are the error details? Commented Feb 9, 2018 at 14:01
  • I download the library in this link:github.com/bportaluri/WiFiEsp and tried the ConnectWPA example. Commented Feb 10, 2018 at 2:40
  • 1
    and the compile error? changing connections is for nothing if the code doesn't compile and upload Commented Feb 14, 2018 at 14:31

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