Relay x16 Board

Archive
1

Can I have multiple Relay x16 Boards on the same Cobra? I think I read they can be daisy chained but I cannot find anything on that.

2

Yes they use I2C so they can be chained, up to 7 (112 relays!)

You need more than 16 relays?! Must be some cool project :slight_smile:

3

homemade beer system!

4

How do I chain them? Any pictures or docs around?

5

You need to manually create “Y” cable. It is a simple pin to pin connection. Remember to change the address on the device using jumpers.

6

Figured that out. But any recommendation on talking to the 2 boards at the same time? Seems only one I2C device can be active at the same time:

var I2C = new I2CDevice(new I2CDevice.Configuration(0x20, 100));
var I2C2 = new I2CDevice(new I2CDevice.Configuration(0x21, 100));

It fails when it trys to open i2c2…

7

Correct. Read the wiki page on how to use multiple I2C devices GHI Electronics – Where Hardware Meets Software

8

Thanks!

9

I changed the driver to support 8 boards. Interested in it?

10

yes sure

11

I attached it. Works great for me. I like the function GetRelayFromNum but it does add lots of extra lines.

12

Hi

I’d sure like to see this code. Can someone forward it to me? Also I don’t see any dips on my board

Thx

13

Can someone post the code to address multiple relay boards? I’m too lazy to figure it out myself :wink: