A Python library for Nextion smart display management
Source: http://wiki.iteadstudio.com/Nextion_Instruction_Set
Nextion chunk size is 8 byte.
70 68656c6c6f ffff ff = 8 + 1 67 005600c501 ffff ff 65 000101 ffffff = 8 + 8
3 messages, 4 read() operations.