Arduino IDE setup process about microocpp

[matth-x]

Hi Akhil, you can copy the whole repo into the Arduino IDE library folder. To get started, please create a new project and copy all files from the OneConnector_EVSE folder into the project folder.

[pulse-aj]

Thank you Matth-x. Let me give this a go. I have successfully setup Steve. Now time to get a chargepoint simulator running using your code

[204maker]

Hi Akhil, you can copy the whole repo into the Arduino IDE library folder. To get started, please create a new project and copy all files from the OneConnector_EVSE folder into the project folder.

Are there any special tweaks to be made to be able to compile/run successfully in Arduino for ESP32?
I am having errors with missing files.

[matth-x]

At this moment, only the example in the folder ESP32 can compile for the ESP32. But it showcases all mechanics of the OCPP library, so it is a good starting point as well.

You can patch the other examples by adapting the Wi-Fi connection method in the main file and changing the pin mapping. And it needs the dependencies from the ESP32 environment in the platformio.ini.

[pulse-aj]

So I tried following the steps you provided Matth-x. But ran into an error. I am using a generic NodeMCU ESP8266 broad, but somehow it's asking for a ESP32 FS libraries. Any idea how I can resolve them in Arduino IDE?

/Users/akhil/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/ConfigurationContainerFlash.cpp:15:10: fatal error: LITTLEFS.h: No such file or directory
15 | #include <LITTLEFS.h>
| ^~~~~~~~~~~~
compilation terminated.
exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).

[pulse-aj]

Made a bit more progress, I installed the LITTLEFS library. Now I get this error while compiling

/Users/akhil/Documents/Arduino/libraries/LITTLEFS/src/LITTLEFS.cpp:17:10: fatal error: vfs_api.h: No such file or directory
17 | #include "vfs_api.h"
| ^~~~~~~~~~~
compilation terminated.
exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).

[pulse-aj]

Resolved the above issue by doing two things
a) editing file "ConfigurationContainerFlash.cpp' inside the ArduinoOCpp library. The edit was to simply replace any reference for LITTLEFS to LittleFS
b) installed the esp32 board libraries as well.

After compiling post the steps above, I get a new error as follows.

WARNING: library ArduinoOcpp claims to run on espressif8266, espressif32 architecture(s) and may be incompatible with your current board which runs on esp8266 architecture(s).
/Users/akhil/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/MessagesV16/ChangeConfiguration.cpp: In member function 'virtual void ArduinoOcpp::Ocpp16::ChangeConfiguration::processReq(ArduinoJson::JsonObject)':
/Users/akhil/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/MessagesV16/ChangeConfiguration.cpp:43:32: error: invalid conversion from 'char' to 'const char*' [-fpermissive]
43 | const char *value_string = '\0';
| ^~~~
| |
| char
exit status 1
Error compiling for board Generic ESP8266 Module.

[pulse-aj]

Found the issue. For this code to compile successfully, you need to change the board version from esp8266 3.0 to 2.7.4. One can do this by going to Tools -> Boards -> Boardmanager --> type in ESP8266 --> select 2.7.4 and install.

[pulse-aj]

Here are the board manager URLs that I set under preferences

https://dl.espressif.com/dl/package_esp32_index.json, http://arduino.esp8266.com/stable/package_esp8266com_index.json

[EZBOT1]

Found the issue. For this code to compile successfully, you need to change the board version from esp8266 3.0 to 2.7.4. One can do this by going to Tools -> Boards -> Boardmanager --> type in ESP8266 --> select 2.7.4 and install.

hey I changed the board version but getting new error . can you help?
`

WARNING: library ArduinoOcpp claims to run on espressif8266, espressif32 architecture(s) and may be incompatible with your current board which runs on esp8266 architecture(s).
In file included from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.hpp:37:0,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.h:9,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperationCallbacks.h:8,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.h:14,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:5:
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp: In instantiation of 'static void ArduinoJson6194_F1::Converter<T, Enable>::toJson(const T&, ArduinoJson6194_F1::VariantRef) [with T = std::basic_string; Enable = void]':
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/VariantRef.hpp:173:38: required from 'bool ArduinoJson6194_F1::VariantRef::set(const T&) const [with T = std::basic_string]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Document/JsonDocument.hpp:201:27: required from 'bool ArduinoJson6194_F1::JsonDocument::add(const TValue&) [with TValue = std::basic_string]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:118:36: required from here
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:17:27: error: no matching function for call to 'convertToJson(const std::basic_string&, ArduinoJson6194_F1::VariantRef&)'
convertToJson(src, dst); // Error here? See https://arduinojson.org/v6/unsupported-set/
^
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:17:27: note: candidates are:
In file included from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Document/BasicJsonDocument.hpp:7:0,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Document/DynamicJsonDocument.hpp:7,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.hpp:28,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.h:9,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperationCallbacks.h:8,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.h:14,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:5:
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Document/JsonDocument.hpp:291:13: note: void ArduinoJson6194_F1::convertToJson(const ArduinoJson6194_F1::JsonDocument&, ArduinoJson6194_F1::VariantRef)
inline void convertToJson(const JsonDocument& src, VariantRef dst) {
^
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Document/JsonDocument.hpp:291:13: note: no known conversion for argument 1 from 'const std::basic_string' to 'const ArduinoJson6194_F1::JsonDocument&'
In file included from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.hpp:37:0,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.h:9,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperationCallbacks.h:8,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.h:14,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:5:
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:247:13: note: void ArduinoJson6194_F1::convertToJson(const Printable&, ArduinoJson6194_F1::VariantRef)
inline void convertToJson(const ::Printable& src, VariantRef dst) {
^
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:247:13: note: no known conversion for argument 1 from 'const std::basic_string' to 'const Printable&'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:155:59: note: template typename ArduinoJson6194_F1::enable_if<ArduinoJson6194_F1::IsString<TString, void>::value, bool>::type ArduinoJson6194_F1::convertToJson(const T&, ArduinoJson6194_F1::VariantRef)
inline typename enable_if<IsString::value, bool>::type convertToJson(
^
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:155:59: note: template argument deduction/substitution failed:
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp: In substitution of 'template typename ArduinoJson6194_F1::enable_if<ArduinoJson6194_F1::IsString<TString, void>::value, bool>::type ArduinoJson6194_F1::convertToJson(const T&, ArduinoJson6194_F1::VariantRef) [with T = std::basic_string]':
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:17:27: required from 'static void ArduinoJson6194_F1::Converter<T, Enable>::toJson(const T&, ArduinoJson6194_F1::VariantRef) [with T = std::basic_string; Enable = void]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/VariantRef.hpp:173:38: required from 'bool ArduinoJson6194_F1::VariantRef::set(const T&) const [with T = std::basic_string]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Document/JsonDocument.hpp:201:27: required from 'bool ArduinoJson6194_F1::JsonDocument::add(const TValue&) [with TValue = std::basic_string]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:118:36: required from here
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:155:59: error: no type named 'type' in 'struct ArduinoJson6194_F1::enable_if<false, bool>'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp: In instantiation of 'static T ArduinoJson6194_F1::Converter<T, Enable>::fromJson(ArduinoJson6194_F1::VariantConstRef) [with T = std::basic_string; Enable = void]':
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/VariantRef.hpp:72:40: required from 'typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type ArduinoJson6194_F1::VariantConstRef::as() const [with T = std::basic_string; typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::is_same<T, char>::value)), T>::type = std::basic_string]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Array/ElementProxy.hpp:71:53: required from 'typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::ConverterNeedsWriteableRef::value)), T>::type ArduinoJson6194_F1::ElementProxy< >::as() const [with T = std::basic_string; TArray = ArduinoJson6194_F1::JsonDocument&; typename ArduinoJson6194_F1::enable_if<((! ArduinoJson6194_F1::is_same<T, char*>::value) && (! ArduinoJson6194_F1::ConverterNeedsWriteableRef::value)), T>::type = std::basic_string]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:158:56: required from here
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:24:32: error: invalid initialization of reference of type 'String&' from expression of type 'std::basic_string'
convertFromJson(src, result); // Error here? See https://arduinojson.org/v6/unsupported-as/
^
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:266:13: error: in passing argument 2 of 'void ArduinoJson6194_F1::convertFromJson(ArduinoJson6194_F1::VariantConstRef, String&)'
inline void convertFromJson(VariantConstRef src, ::String& dst) {
^
In file included from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/serialize.hpp:7:0,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/JsonSerializer.hpp:9,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/ConverterImpl.hpp:7,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.hpp:37,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson.h:9,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperationCallbacks.h:8,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.h:14,
from /Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:5:
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/Writer.hpp: In instantiation of 'size_t ArduinoJson6194_F1::Writer<TDestination, Enable>::write(const uint8_t*, size_t) [with TDestination = std::basic_string; Enable = void; size_t = unsigned int; uint8_t = unsigned char]':
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/CountingDecorator.hpp:21:12: required from 'void ArduinoJson6194_F1::CountingDecorator::write(const uint8_t*, size_t) [with TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>; uint8_t = unsigned char; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/TextFormatter.hpp:145:5: required from 'void ArduinoJson6194_F1::TextFormatter::writeRaw(const char*) [with TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/JsonSerializer.hpp:97:5: required from 'size_t ArduinoJson6194_F1::JsonSerializer::visitNull() [with TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/VariantFunctions.hpp:20:30: required from 'typename TVisitor::result_type ArduinoJson6194_F1::variantAccept(const ArduinoJson6194_F1::VariantData*, TVisitor&) [with TVisitor = ArduinoJson6194_F1::JsonSerializer<ArduinoJson6194_F1::Writer<std::basic_string, void> >; typename TVisitor::result_type = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/serialize.hpp:15:68: required from 'size_t ArduinoJson6194_F1::doSerialize(ArduinoJson6194_F1::VariantConstRef, TWriter) [with TSerializer = ArduinoJson6194_F1::JsonSerializer; TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/serialize.hpp:21:49: required from 'size_t ArduinoJson6194_F1::serialize(ArduinoJson6194_F1::VariantConstRef, TDestination&) [with TSerializer = ArduinoJson6194_F1::JsonSerializer; TDestination = std::basic_string; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/JsonSerializer.hpp:120:55: required from 'size_t ArduinoJson6194_F1::serializeJson(ArduinoJson6194_F1::VariantConstRef, TDestination&) [with TDestination = std::basic_string; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:130:35: required from here
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/Writer.hpp:22:29: error: 'class std::basic_string' has no member named 'write'
return _dest->write(s, n);
^
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/Writer.hpp: In instantiation of 'size_t ArduinoJson6194_F1::Writer<TDestination, Enable>::write(uint8_t) [with TDestination = std::basic_string; Enable = void; size_t = unsigned int; uint8_t = unsigned char]':
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/CountingDecorator.hpp:17:12: required from 'void ArduinoJson6194_F1::CountingDecorator::write(uint8_t) [with TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>; uint8_t = unsigned char]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/TextFormatter.hpp:162:5: required from 'void ArduinoJson6194_F1::TextFormatter::writeRaw(char) [with TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/TextFormatter.hpp:81:19: required from 'void ArduinoJson6194_F1::TextFormatter::writeFloat(T) [with T = double; TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/JsonSerializer.hpp:62:5: required from 'size_t ArduinoJson6194_F1::JsonSerializer::visitFloat(ArduinoJson6194_F1::Float) [with TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>; size_t = unsigned int; ArduinoJson6194_F1::Float = double]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/VariantData.hpp:49:51: required from 'typename TVisitor::result_type ArduinoJson6194_F1::VariantData::accept(TVisitor&) const [with TVisitor = ArduinoJson6194_F1::JsonSerializer<ArduinoJson6194_F1::Writer<std::basic_string, void> >; typename TVisitor::result_type = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Variant/VariantFunctions.hpp:18:31: required from 'typename TVisitor::result_type ArduinoJson6194_F1::variantAccept(const ArduinoJson6194_F1::VariantData*, TVisitor&) [with TVisitor = ArduinoJson6194_F1::JsonSerializer<ArduinoJson6194_F1::Writer<std::basic_string, void> >; typename TVisitor::result_type = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/serialize.hpp:15:68: required from 'size_t ArduinoJson6194_F1::doSerialize(ArduinoJson6194_F1::VariantConstRef, TWriter) [with TSerializer = ArduinoJson6194_F1::JsonSerializer; TWriter = ArduinoJson6194_F1::Writer<std::basic_string, void>; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/serialize.hpp:21:49: required from 'size_t ArduinoJson6194_F1::serialize(ArduinoJson6194_F1::VariantConstRef, TDestination&) [with TSerializer = ArduinoJson6194_F1::JsonSerializer; TDestination = std::basic_string; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Json/JsonSerializer.hpp:120:55: required from 'size_t ArduinoJson6194_F1::serializeJson(ArduinoJson6194_F1::VariantConstRef, TDestination&) [with TDestination = std::basic_string; size_t = unsigned int]'
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoOcpp/src/ArduinoOcpp/Core/OcppOperation.cpp:130:35: required from here
/Users/aashutoshjha/Documents/Arduino/libraries/ArduinoJson/src/ArduinoJson/Serialization/Writer.hpp:18:26: error: 'class std::basic_string' has no member named 'write'
return _dest->write(c);
^
exit status 1
Error compiling for board Generic ESP8266 Module.

`