ONVIF-ActionEngine-Service-Spec-v100
onvif_core_specification_ver_1.01
onvif_test_specification_ver1.01
ONVIF_WG-APG-Application_Programmer’s_Guide
pelco structure
refernz for arduino inplementation needs :
Pelco-D
Byte 1 – Start transmission – always 0xFF
Byte 2 – Address of camera
Byte 3 – Command 1
Byte 4 – Command 2
Byte 5 – Data 1
Byte 6 – Data 2
Byte 7 – Checksum
Pelco-P
Byte 1 – Start transmission. Always 0xA0
Byte 2 – Address of camera – Range 0x00 to 0x1F
Byte 3 – Command 1
Byte 4 – Command 2
Byte 5 – Data 1
Byte 6 – Data 2
Byte 7 – End Transmission. Always 0xAF
Byte 8 – Checksum