HDMI

Pinout

pin	signal	notes	connector
1	TMDS Data2+
2	TMDS Data2 Shield
3	TMDS Data2−
4	TMDS Data1+
5	TMDS Data1 Shield
6	TMDS Data1−
7	TMDS Data0+
8	TMDS Data0 Shield
9	TMDS Data0−
10	TMDS Clock+
11	TMDS Clock Shield
12	TMDS Clock−
13	CEC
14	Reserved (HDMI 1.0–1.3c), HEC Data− (Optional, HDMI 1.4+ with Ethernet)
15	SCL (I²C Serial Clock for DDC
16	SDA (I²C Serial Data Line for DDC)
17	DDC/CEC/HEC Ground
18	+5 V (max 50 mA)
19	Hot Plug detect (all versions) and HEC Data+ (optional, HDMI 1.4+ with Ethernet)

Note: Category 2 (High Speed HDMI Cable) is required for 1080p, 4K, 3D and deep color support

External reference:

To be able to use the HDMI CEC/Anynet+ functionality, you have to enable HDMI Device Link

PS4 does support the use of compatible remote controls with limited functionality to navigate the PS4 system's user interface and some applications.

https://code.google.com/archive/p/cec-arduino/ Arduino library which implements the HDMI v1.3a CEC

http://libcec.pulse-eight.com An enabling platform for the CEC bus in HDMI
https://github.com/chbmuc/cec A Go interface to LibCEC
https://github.com/chbmuc/cec-web A REST micro webservice to control devices via the CEC bus in HDMI
https://github.com/jasmas/cecd Script which can be used to run the cec-client utility
https://github.com/robbiet480/cecd Script which can be used to run the cec-client utility
https://github.com/robbiet480/CEC-Roomie Roomie <-> cec-web bridge
https://github.com/adammw/node-cec libcec bindings for node.js