# Connect PCM in IOT#0? and disconnect Audio jack WP7607

**URL:** <https://mangoh.discourse.group/t/connect-pcm-in-iot-0-and-disconnect-audio-jack-wp7607/2251>\
**Category:** mangOH Green\
**Created:** [December 19, 2018, 9:25am UTC](https://mangoh.discourse.group/t/connect-pcm-in-iot-0-and-disconnect-audio-jack-wp7607/2251 "2018-12-19T09:25:51Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![natanb](https://avatars.discourse-cdn.com/v4/letter/n/45deac/32.png) [@natanb](https://mangoh.discourse.group/u/natanb)\
**Post date:** [December 19, 2018, 9:25am UTC](https://mangoh.discourse.group/t/connect-pcm-in-iot-0-and-disconnect-audio-jack-wp7607/2251/1 "2018-12-19T09:25:51Z")

</div>

Hi  
i am using WP7607  
I can’t connect PCM to IOT#0.  
I have already look at

> [@How to configuration to using PCM in IOT#0?](https://mangoh.discourse.group/t/how-to-configuration-to-using-pcm-in-iot-0/143):
>
> I can not see any documents talking about this? Can you help me? Thanks

I am looking for software solution.  
From 4118903\_mangOH\_Green\_(DV4)\_Developers\_Guide\_r3.pdf  
Table 2-5: GPIO Expander Signals  
I have to master gpio - I/O\_6 for PCM\_ANALOG\_SELECT , I/O\_9 for PCM\_EXP1\_ENn, I/O\_10 PCM\_EXP1\_SEL. ???

From AirPrime\_WP76xx\_Product\_Technical\_Specification\_Rev6\_2.pdf  
Table 4-6: GPIO Pin Description  
Which gpio should I use  
I have tried gpios - 2,7,8,13,21,22,23,24,25,28,29,30,31,32,33,35,42  
using at commads - AT+WIOCFG==,4,1,1,0,0  
AT+WIOW==,  
I do know the following connection  
GPIO42 - Controls pin 24  
GPIO13 - Controls pin 26  
GPIO33 - Controls pin 25  
GPIO8 - Controls pin 27

and gpios 36,37,38,40,41 using legato apps “streamMedia”.

I couldn’t disconnect the Audio jack or connect PCM (pins on extender 36,35,34,33).  
I have also tried to active MuxControl from [GitHub - mangOH/MuxControl](https://github.com/mangOH/MuxControl)  
I have got on ssh

Connecting to service …  
Error: Can’t connect to muxCtrlService. Is it running?

cm info  
Device: WP7607-1  
IMEI: 359780080132123  
IMEISV: 5  
FSN: VP804370200810  
Firmware Version: SWI9X07Y\_02.18.05.00 000000 jenkins 2018/07/19 17:40:21  
Bootloader Version: SWI9X07Y\_02.18.05.00 000000 jenkins 2018/07/19 17:40:21  
MCU Version: 002.009  
PRI Part Number (PN): 9907364  
PRI Revision: 001.004  
Carrier PRI Name: SIERRA  
Carrier PRI Revision: 001.002\_000  
SKU: 1103529  
Last Reset Cause: Reset, User Requested  
Resets Count: Expected: 418 Unexpected: 0