Excellent work!
@vshymanskyy - for info… (hope you are okay by the way 
)
Pete.
1 Like
Thanks so much.
Looking forward for an interesting project now with my students.
All the best to all of you
Andreas
hello! i’ve followed your steps and edited the codes but it shows this.
Arduino: 1.8.19 (Mac OS X), Board: “Arduino Uno WiFi Rev2, ATMEGA328”
BlynkParam1_test:16:10: fatal error: Blynk/BlynkParam1_test.h: No such file or directory
#include <Blynk/BlynkParam1_test.h>
^~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Blynk/BlynkParam1_test.h: No such file or directory
This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.
@hellosnakie all you have to do is go to blynk/src/blynk/blynkparam.h file then use any text editing software for example notepad++ to replace atoll with atol.
You can use find and replace feature to replace all atolls with a single button click.
hello @John93! thank you for your prompt reply. i’ve replaced all “atoll” with “atol” & the error still persists. 
Arduino: 1.8.19 (Mac OS X), Board: “Arduino Uno WiFi Rev2, ATMEGA328”
BlynkParam:16:10: fatal error: Blynk/BlynkConfig.h: No such file or directory
- #include <Blynk/BlynkConfig.h>*
-
^~~~~~~~~~~~~~~~~~~~~*
compilation terminated.
exit status 1
Blynk/BlynkConfig.h: No such file or directory
This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.
#ifndef BlynkParam_h
#define BlynkParam_h
#include <string.h>
#include <stdlib.h>
#include <Blynk/BlynkConfig.h>
#include <Blynk/BlynkDebug.h>
#define BLYNK_PARAM_KV(k, v) k "\0" v "\0"
#define BLYNK_PARAM_PLACEHOLDER_64 "PlaceholderPlaceholderPlaceholderPlaceholderPlaceholderPlaceholder"
#if !defined(BLYNK_NO_FLOAT)
extern char* dtostrf_internal(double number, signed char width, unsigned char prec, char *s);
#endif
#if !defined(BLYNK_NO_LONGLONG)
extern long long atol_internal(const char *s);
#endif
class BlynkParam
{
public:
class iterator
{
public:
iterator(const char* c, const char* l) : ptr(c), limit(l) {}
static iterator invalid() { return iterator(NULL, NULL); }
operator const char* () const { return asStr(); }
operator int () const { return asInt(); }
const char* asStr() const { return ptr; }
const char* asString() const { return ptr; }
int asInt() const { if(!isValid()) return 0; return atoi(ptr); }
long asLong() const { if(!isValid()) return 0; return atol(ptr); }
#if !defined(BLYNK_NO_LONGLONG) && defined(BLYNK_USE_INTERNAL_ATOL)
long long asLongLong() const { return atol_internal(ptr); }
#elif !defined(BLYNK_NO_LONGLONG)
long long asLongLong() const { return atol(ptr); }
#endif
#if !defined(BLYNK_NO_FLOAT)
double asDouble() const { if(!isValid()) return 0; return atof(ptr); }
float asFloat() const { if(!isValid()) return 0; return atof(ptr); }
#endif
bool isValid() const { return ptr != NULL && ptr < limit; }
bool isEmpty() const { if(!isValid()) return true; return *ptr == '\0'; }
bool operator < (const iterator& it) const { return ptr < it.ptr; }
bool operator >= (const iterator& it) const { return ptr >= it.ptr; }
iterator& operator ++() {
if(isValid()) {
ptr += strlen(ptr) + 1;
}
return *this;
}
private:
const char* ptr;
const char* limit;
};
public:
explicit
BlynkParam(const void* addr, size_t length)
: buff((char*)addr), len(length), buff_size(length)
{}
explicit
BlynkParam(void* addr, size_t length, size_t buffsize)
: buff((char*)addr), len(length), buff_size(buffsize)
{}
const char* asStr() const { return buff; }
const char* asString() const { return buff; }
int asInt() const { return atoi(buff); }
long asLong() const { return atol(buff); }
#if !defined(BLYNK_NO_LONGLONG) && defined(BLYNK_USE_INTERNAL_ATOL)
long long asLongLong() const { return atol_internal(buff); }
#elif !defined(BLYNK_NO_LONGLONG)
long long asLongLong() const { return atol(buff); }
#endif
#if !defined(BLYNK_NO_FLOAT)
double asDouble() const { return atof(buff); }
float asFloat() const { return atof(buff); }
#endif
bool isEmpty() const { return *buff == '\0'; }
iterator begin() const { return iterator(buff, buff+len); }
iterator end() const { return iterator(buff+len, buff+len); }
iterator operator[](int index) const;
iterator operator[](const char* key) const;
void* getBuffer() const { return (void*)buff; }
size_t getLength() const { return len; }
size_t getBuffSize() const { return buff_size; }
// Modification
void clear() { len = 0; }
void add(int value);
void add(unsigned int value);
void add(long value);
void add(unsigned long value);
void add(long long value);
void add(unsigned long long value);
#ifndef BLYNK_NO_FLOAT
void add(float value);
void add(double value);
#endif
void add(const char* str);
void add(const void* b, size_t l);
#if defined(ARDUINO) || defined(SPARK) || defined(PARTICLE)
void add(const String& str);
#if defined(BLYNK_HAS_PROGMEM)
void add(const __FlashStringHelper* str);
#endif
#endif
template<typename T, typename... Args>
void add_multi(T last) {
add(last);
}
template<typename T, typename... Args>
void add_multi(T head, Args... tail) {
add(head);
add_multi(tail...);
}
template <typename TV>
void add_key(const char* key, const TV& val) {
add(key);
add(val);
}
void remove_key(const char* key);
protected:
char* buff;
size_t len;
size_t buff_size;
};
class BlynkParamAllocated
: public BlynkParam
{
public:
BlynkParamAllocated(size_t size)
: BlynkParam(malloc(size), 0, size)
{}
~BlynkParamAllocated() {
free(buff);
}
};
inline
BlynkParam::iterator BlynkParam::operator[](int index) const
{
const iterator e = end();
for (iterator it = begin(); it < e; ++it) {
if (!index--) {
return it;
}
}
return iterator::invalid();
}
inline
BlynkParam::iterator BlynkParam::operator[](const char* key) const
{
const iterator e = end();
for (iterator it = begin(); it < e; ++it) {
if (!strcmp(it.asStr(), key)) {
return ++it;
}
++it;
if (it >= e) break;
}
return iterator::invalid();
}
inline
void BlynkParam::remove_key(const char* key)
{
bool found;
do {
found = false;
const iterator e = end();
for (iterator it = begin(); it < e; ++it) {
if (!strcmp(it.asStr(), key)) {
const char* key = it.asStr();
++it; ++it;
const char* next = it.asStr();
memmove((void*)key, next, (buff+len)-next);
len -= (next-key);
found = true;
break;
}
++it;
if (it >= e) break;
}
} while (found);
}
inline
void BlynkParam::add(const void* b, size_t l)
{
if (len + l > buff_size)
return;
memcpy(buff+len, b, l);
len += l;
}
inline
void BlynkParam::add(const char* str)
{
if (str == NULL) {
buff[len++] = '\0';
return;
}
add(str, strlen(str)+1);
}
#if defined(ARDUINO) || defined(SPARK) || defined(PARTICLE)
inline
void BlynkParam::add(const String& str)
{
#if defined(ARDUINO_AVR_DIGISPARK) \
|| defined(__ARDUINO_X86__) \
|| defined(__RFduino__)
size_t len = str.length()+1;
char buff[len];
const_cast<String&>(str).toCharArray(buff, len);
add(buff, len);
#else
add(str.c_str());
#endif
}
#if defined(BLYNK_HAS_PROGMEM)
inline
void BlynkParam::add(const __FlashStringHelper* ifsh)
{
PGM_P p = reinterpret_cast<PGM_P>(ifsh);
size_t l = strlen_P(p) + 1;
if (len + l > buff_size)
return;
memcpy_P(buff+len, p, l);
len += l;
buff[len] = '\0';
}
#endif
#endif
#if defined(__AVR__) || defined (ARDUINO_ARCH_ARC32)
#include <stdlib.h>
inline
void BlynkParam::add(int value)
{
char str[2 + 8 * sizeof(value)];
itoa(value, str, 10);
add(str);
}
inline
void BlynkParam::add(unsigned int value)
{
char str[1 + 8 * sizeof(value)];
utoa(value, str, 10);
add(str);
}
inline
void BlynkParam::add(long value)
{
char str[2 + 8 * sizeof(value)];
ltoa(value, str, 10);
add(str);
}
inline
void BlynkParam::add(unsigned long value)
{
char str[1 + 8 * sizeof(value)];
ultoa(value, str, 10);
add(str);
}
inline
void BlynkParam::add(long long value) // TODO: this currently adds just a long
{
char str[2 + 8 * sizeof(value)];
ltoa(value, str, 10);
add(str);
}
inline
void BlynkParam::add(unsigned long long value) // TODO: this currently adds just a long
{
char str[1 + 8 * sizeof(value)];
ultoa(value, str, 10);
add(str);
}
#ifndef BLYNK_NO_FLOAT
inline
void BlynkParam::add(float value)
{
char str[33];
dtostrf(value, 5, 3, str);
add(str);
}
inline
void BlynkParam::add(double value)
{
char str[33];
dtostrf(value, 5, 7, str);
add(str);
}
#endif
#else
#include <stdio.h>
inline
void BlynkParam::add(int value)
{
len += snprintf(buff+len, buff_size-len, "%i", value)+1;
}
inline
void BlynkParam::add(unsigned int value)
{
len += snprintf(buff+len, buff_size-len, "%u", value)+1;
}
inline
void BlynkParam::add(long value)
{
len += snprintf(buff+len, buff_size-len, "%li", value)+1;
}
inline
void BlynkParam::add(unsigned long value)
{
len += snprintf(buff+len, buff_size-len, "%lu", value)+1;
}
inline
void BlynkParam::add(long long value)
{
len += snprintf(buff+len, buff_size-len, "%lli", value)+1;
}
inline
void BlynkParam::add(unsigned long long value)
{
len += snprintf(buff+len, buff_size-len, "%llu", value)+1;
}
#ifndef BLYNK_NO_FLOAT
#if defined(BLYNK_USE_INTERNAL_DTOSTRF)
inline
void BlynkParam::add(float value)
{
char str[33];
dtostrf_internal(value, 5, 3, str);
add(str);
}
inline
void BlynkParam::add(double value)
{
char str[33];
dtostrf_internal(value, 5, 7, str);
add(str);
}
#else
inline
void BlynkParam::add(float value)
{
len += snprintf(buff+len, buff_size-len, "%2.3f", value)+1;
}
inline
void BlynkParam::add(double value)
{
len += snprintf(buff+len, buff_size-len, "%2.7f", value)+1;
}
#endif
#endif
#endif
#endif
@hellosnakie Please edit your post, using the pencil icon at the bottom, and add triple backticks at the beginning and end of your code so that it displays correctly.
Triple backticks look like this:
```
Pete.
@John93 thank you for your reply! 
I’ve used the modified file attached but the following error still exists. (line 16 showed in the screenshot attached)
Arduino: 1.8.19 (Mac OS X), Board: “Arduino Uno WiFi Rev2, ATMEGA328”
BlynkParam:16:10: fatal error: Blynk/BlynkConfig.h: No such file or directory
#include <Blynk/BlynkConfig.h>
^~~~~~~~~~~~~~~~~~~~~
compilation terminated.
exit status 1
Blynk/BlynkConfig.h: No such file or directory
This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.
Have you tried uninstall/reinstall ?
Blynk library.
hello! i’ve uninstalled and reinstalled blynk library but the same error as my previous post still persists…
I just tried it, everything is working properly.
You’re using the latest version of blynk library right ?
How are you installing the library?
Are you using the library manager in the IDE, and if so which version does it show as installed?
Pete.
can i check which version of blynk did you installed?
@PeteKnight
yes, i installed the library manager in the IDE & i am using the latest version (see screenshot attached)
I’ll investigate.
sorry for the trouble & thank you so much! 
No problem buddy.
Go to src/blynk folder, can you see a file named " BlynkConfig.h " ?
yup.