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Learn ESP32 with Arduino IDE page 361 ff

Q&A Forum › Learn ESP32 with Arduino IDE page 361 ff
0 Vote Up Vote Down
Steve Fisch asked 11 months ago

In this sketch (which i named ESP32_Client_1_LED_DS18B20) I am sure I have the libraries:

#include <WiFi.h>
extern “C” {
#include “freertos/FreeRTOS.h”
#include “freertos/timers.h”
}
#include <AsyncMqttClient.h>
#include <OneWire.h>
#include <DallasTemperature.h>

correct – I have reinstalled them from zip files I downloaded today.

I am also sure that I have the correct board manager URL’s installed

When I test or try to complie the sketch, I get the following errors:

ESP32_Client_1_LED_DS18B20:53:16: error: variable or field ‘WiFiEvent’ declared void
void WiFiEvent(WiFiEvent_t event) {
^
ESP32_Client_1_LED_DS18B20:53:16: error: ‘WiFiEvent_t’ was not declared in this scope
E:\00000 -E-Data\Arduino\ESP32_Client_1_LED_DS18B20\ESP32_Client_1_LED_DS18B20.ino: In function ‘void connectToWifi()’:
E:\00000 -E-Data\Arduino\ESP32_Client_1_LED_DS18B20\ESP32_Client_1_LED_DS18B20.ino:45:38: warning: ISO C++ forbids converting a string constant to ‘char*’ [-Wwrite-strings]
WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
^
E:\00000 -E-Data\Arduino\ESP32_Client_1_LED_DS18B20\ESP32_Client_1_LED_DS18B20.ino: At global scope:
ESP32_Client_1_LED_DS18B20:53:16: error: variable or field ‘WiFiEvent’ declared void
void WiFiEvent(WiFiEvent_t event) {
^
ESP32_Client_1_LED_DS18B20:53:16: error: ‘WiFiEvent_t’ was not declared in this scope
exit status 1
variable or field ‘WiFiEvent’ declared void

 

Please let me know what I am doing wrong.

 

As always, many thanks,

Steve

3 Answers
0 Vote Up Vote Down
Sara Santos Staff answered 11 months ago

Hi.
Did you change anything on the code provided?
Tell me the versions of the libraries you’re using and I’ll try it with those.
Regards,
Sara

0 Vote Up Vote Down
Steve Fisch answered 11 months ago

Hi Sara,

Please close this question/topic. I reinstalled Arduino IDE and reset my libraries – that resolved my issue.

As always,
Thanks!

Steve

0 Vote Up Vote Down
Sara Santos Staff answered 11 months ago

Ok.
I’m glad you found the issue.
I’ll mark this issue as resolved. If you need further help, you just need to open a new question in our forum.
Regards,
Sara

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