static const uint8_t cmd_light_off[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
static const uint8_t cmd_write_screen[] = { 0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00 };
static const uint8_t cmd_light_off[] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };
static const uint8_t cmd_write_screen[] = { 0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x00 };