As character names:

U+2402 SYMBOL FOR START OF TEXT character (␂)

As raw characters:

␂

As a string of HTML entities:

␂

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 144, hex 0x90, octal \220, binary 10010000
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 130, hex 0x82, octal \202, binary 10000010
This is continuation byte 2, expecting 0 more.

U+2402	SYMBOL FOR START OF TEXT