# HDMI-CEC Control **URL:** https://community.xibo.org.uk/t/hdmi-cec-control/5202 **Category:** Xibo Player for Android **Created:** [February 28, 2016, 9:04pm UTC](https://community.xibo.org.uk/t/hdmi-cec-control/5202 "2016-02-28T21:04:36Z") **Posts on this page:** 1 **Showing post:** 15
### Author: ![edup](https://community.xibo.org.uk/user_avatar/community.xibo.org.uk/edup/32/4353_2.png) [@edup](https://community.xibo.org.uk/u/edup) #### Post date: [December 19, 2017, 4:54pm UTC](https://community.xibo.org.uk/t/hdmi-cec-control/5202/15 "2017-12-19T16:54:24Z")
So, thanks to @Guru_Evi I was able to compile cec-client to android. Thanks a lot for your instructions. As a note to the future, I had to add a flag -DANDROID\_PLATFORM=android-16 in order to be able to execute the command on android \>= 5.0, otherwise I was receiving the error " error: only position independent executables (PIE) are supported.". I’ve added the flag -DHAVE\_EXYNOS\_API=1 and -DHAVE\_AOCEC\_API=1 Now I’m facing a problem of “command ‘PING’ was not acked by the controller”. I’m running it on [this android dongle](http://bit.ly/2oNo2Eb). The device /dev/cec is settled: ``` q8723bs:/ # ls -l /dev/cec crw-rw-rw- 1 root root 218, 0 2017-12-19 16:33 /dev/cec ``` I also can find it on /sys/class/cec: ``` q8723bs:/ # ls -laht /sys/class/cec/ total 0 -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 arc_port lrwxrwxrwx 1 root root 0 2017-12-19 16:45 cec -> ../../devices/aocec/cec -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 cec_version --w------- 1 root root 4.0K 2017-12-19 16:45 cmd -rw-rw-r-- 1 root root 4.0K 2017-12-19 16:45 dbg_en -rw-rw-r-- 1 root root 4.0K 2017-12-19 16:45 device_type -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 dump_reg -rw-rw-r-- 1 root root 4.0K 2017-12-19 16:45 fun_cfg -rw-rw-r-- 1 root root 4.0K 2017-12-19 16:45 menu_language -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 osd_name -rw-rw-r-- 1 root root 4.0K 2017-12-19 16:45 physical_addr -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 pin_status -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 port_num -rw-rw-r-- 1 root root 4.0K 2017-12-19 16:45 port_seq -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 port_status -rw-rw-r-- 1 root root 4.0K 2017-12-19 16:45 vendor_id -r--r--r-- 1 root root 4.0K 2017-12-19 16:45 wake_up drwxr-xr-x 2 root root 0 2017-12-19 16:33 . drwxr-xr-x 110 root root 0 2017-12-19 16:33 .. ``` But when I ran cec-client I receive this answer: ``` q8723bs:/ # id uid=0(root) gid=0(root) groups=0(root) context=u:r:toolbox:s0 q8723bs:/ # cec-client -s /dev/cec opening a connection to the CEC adapter... DEBUG: [1] Broadcast (F): osd name set to 'Broadcast' DEBUG: [2] connection opened, clearing any previous input and waiting for active transmissions to end before starting DEBUG: [396] communication thread started DEBUG: [1396] command 'PING' was not acked by the controller ``` As a note, I also have the device /dev/input/event2 that is a read only cec\_input: ``` q8723bs:/ # ls -l /dev/input/event2 crw-rw---- 1 root input 13, 66 2017-12-19 16:33 /dev/input/event2 q8723bs:/ # ls /sys/devices/virtual/input/input2/ capabilities/ event2/ id/ modalias name phys power/ properties subsystem/ uevent uniq q8723bs:/ # cat /sys/devices/virtual/input/input2/name cec_input ``` I tried to run it on /dev/input/event2 but obviously it didn’t work because it could not open a connection: ``` q8723bs:/ # cec-client /dev/input/event2 No device type given. Using 'recording device' CEC Parser created - libCEC version 4.0.2 opening a connection to the CEC adapter... DEBUG: [1] Broadcast (F): osd name set to 'Broadcast' ERROR: [3335] error opening serial port '/dev/input/event2': Couldn't lock the serial port ERROR: [3335] could not open a connection (try 1) ``` Any thoughts to help me on this? Thanks in advance. --- _[View the full topic](https://community.xibo.org.uk/t/hdmi-cec-control/5202)._