\u0000 separator in API response

Hey. Me again =)
If I use virtualWrite for multiple values
virtualWrite(pin, value1, value2, value3, value4, value5)
… and try to fetch this pin with HTTP API:
…this happens. values = 0
In browser it looks like this
Not critical, I can parse it, but in case you didn’t know…

Hello. What value format would you expect?

JSON, I guess. Something like this: