GSM V4.2 extend outputs

[kadlik70]

Hi, I have GSM Controller V4.2.
Is it possible to extend the outputs with a relay board?
Thank you for answer.

[Peter Xing]

yes, I have it working. Just connect to i2c PCF8574 , then you get additional 4 relays.

first is for on board relay, 2-5 for those on i2c
outs=0,0,0,0,0 ok