Fighting with access to MCP23017 I/O Ports

[smq]

Hi,

I'm trying to setup input/outputs port using mcp23017 expander connected to i2c port in my Raspberry Pi (http://www.raspberrypi-spy.co.uk/2013/0 ... pi-part-1/).
Firstly I'd like to explain what I have done now. I've been installed WiringPi and i'm able to export GPIO pins on RPI and of course I can configure switches which are directly on RPI board.
But... there is also an option to expand gpio ports using mcp23017 expander (http://wiringpi.com/the-gpio-utility/i2 ... xtensions/), and also I'm able to control inputs/outputs pins using command line. And the main goal here is to configure switches/lights buttons inside the domoticz to control mcp23017 in/out pins. It allows to expand inputs/outputs up to 128 inputs/outputs (It's possible to connect up to 8 devices to i2c bus and each device can support 16 lines).
Have anybody done domoticz configuration to manage mcp23017 in/outs?

I would be grateful for any help!!
Thank you in advance.

[smq]

Is it even possible? Maybe I'd like to go throw the way which is currently impossible to be covered by domoticz software?

The goal I want to achieve to have at least 32 (preferable 48 digital outputs), and at least 16 inputs. Every circuits are done by wires inside the walls.

Any sugestions?

[smq]

Ok, It seems I solved this problem using Dummy Virtual Devices and updating them by JSON and lua scripts and execute commands using script:/ function.
In a while I could present the way and solution if anybody is interested.

For sure the huge goal of this solution is possibility to connect up to 8 mcp23017 devices (each equipped 16 i/o ports) so in fact we can manage up to 128 i/o devices using just 2 communication wires (i2c bus) and it is low cost and stable solution.

Thank you.

[nickos]

hi
if you have a tutorial to explain how you did it
thank you

[smq]

Hi,

I'm do not, but when I find a while I will describe the way.

[macieiks]

Any update ? I have 2x MCPs ready to be installed.

Cheers

[RonEN]

Hi SMQ,

Although it is some time ago since you wrote your message, i am very interesseted in your solution to control the MCP23017.
I hope you can help me with your "tutorial"

Regards,

Ronald.

[oipmok]

new ideas ?
I fight with this a few days (

[oipmok]

Instead mcp23017 I want to use mcp23s17 which is used in PiFace, however, is limited to 4 in domoticz, and the raspberry pi can address their 8 and an additional 8 to spi1, which gives 128 + 128 = 256 inputs / outputs. if someone tried to modify PiFace.cpp domoticz to detect them more than 4 Piface?

[steffend82]

Hi,

does anybody have any tutorial or samples how to manage outputs of one or more MCP23017 with domoticz?

Thanks!

[pkilar]

http://kiler.blog.pl/2017/03/14/raspber ... -mcp23017/

just added few words about it

[ILoveIOT]

try this https://www.domoticz.com/forum/viewtopi ... 32&t=27447

For output i use inside Domoiticz

On;

script:///usr/local/bin/gpio -x mcp230170x24 mode 110 out ; /usr/local/bin/gpio -x mcp230170x24 write 110 0

Off;

script:///usr/local/bin/gpio -x mcp230170x24 mode 110 out ; /usr/local/bin/gpio -x mcp230170x24 write 110 1