Help converting const char to float in Mesh.subscribe()

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1

The Mesh.subscribe() and Mesh.publish() functions send and receive data as const char. Any tips on converting that to float, int, etc. for calculation?

Example syntax:

void myHandler(const char *event, const char *data)
{
  Serial.printlnf("event=%s data=%s", event, data ? data : "NULL");
//would like to cast / convert to float to do maths...tried float variable = data.toFloat() but got compiler errors.
}

void setup()
{
  Serial.begin(9600);
  Mesh.subscribe("motion-sensor", myHandler);
}
2 
double value = atof(data);

You can’t call toFloat() because data is a const char * not a String object. The standard c library function atof can be used with const char *.

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3

Thank you very much! Been a while since I used that c std lib function! I did try to convert to a string first but wasn’t getting very far with that either.