volatile float serialized as int

[stormtroober]

With the last update of the library, i get floats variable serialized as ints variable.
I'm using a ESP32.

This is the code you need:

volatile float distance;
volatile int state;

StaticJsonDocument<128> doc;

   doc["type"] = "data";
   doc["state"] = state;
   Serial.println(distance);
   doc["distance"] = distance;
   serializeJson(doc, msg);
   doc.clear();
   Serial.println(msg);

From the prints i get:
5.74
{"type":"data","state":2,"distance":5}

I don't get this issue using a non volatile variable.
Bye

[bblanchon]

Hi @aleshark87,

Thank you very much for reporting this issue 👍
I'll fix the bug in branch 6.x very soon.

As a workaround, you can cast to float:

doc["distance"] = (float)distance;

Best regards,
Benoit

[bblanchon]

The fix is included in ArduinoJson 6.18.1