hi, i´m trying to make an IoT project with esp32, I´ve already connect my device to cayenne, but when i pasted the code arduino give me this error:
CayenneMQTTClient.h: No such file or directory
anybody who knows how to fix this?
zukia
December 24, 2019, 11:35pm
3
Thanks for the answer shramik_salgaonkar, it effectively solves the problem but I really can’t understand and I want to know if you can clarify.
The code automatically generated by Cayenne makes this inclusion:#include “CayenneMQTTClient.h”
And the Arduino IDE produces this error:
The library has been previously installed and the file is in the following path:
The code in:Cayenne-MQTT-Arduino/ESP32.ino at master · myDevicesIoT/Cayenne-MQTT-Arduino · GitHub
It makes the following inclusion:#include <CayenneMQTTESP32.h>
CayenneMQTTESP32.h is located on the following route:
So :
Why does Cayenne automatically produce code that includes an error?
Why the Arduino IDE can’t find the CayenneMQTTClient.h library?
What is the difference between CayenneMQTTClient.h and CayenneMQTTESP32.h?
I think it is important to understand this.
Best regards.
zukia:
Why does Cayenne automatically produce code that includes an error?
First of all, there is no ESP32 device on the cayenne dashboard to select. We have added support to ESP32 quite later and it is in the GitHub library.
zukia:
Why the Arduino IDE can’t find the CayenneMQTTClient.h library?
Because you had downloaded the cayenne MQTT library.
zukia:
What is the difference between CayenneMQTTClient.h and CayenneMQTTESP32.h?
CayenneMQTTClient.h is the common header for the cayenne MQTT library
/*
The MIT License(MIT)
Cayenne MQTT Client Library
Copyright (c) 2016 myDevices
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
documentation files(the "Software"), to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _CAYENNEMQTTCLIENT_h
#define _CAYENNEMQTTCLIENT_h
show original
whereas CayenneMQTTESP32.h is the header file specific to ESP32 which also includes CayenneMQTTClient.h
/*
The MIT License(MIT)
Cayenne Arduino Client Library
Copyright (c) 2016 myDevices
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
documentation files(the "Software"), to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense, and / or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so, subject to the following conditions :
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _CAYENNEMQTTESP32_h
#define _CAYENNEMQTTESP32_h
show original
