Well not on the board, but you could build your own and attach. But why do that, just use the machine module part and use UDP or wifi.
So you have been coming to a conclusion at this topic - no MCP23017 or something similar on the autosteer board?
As others have said, I also like the possibility to add some relays for use mainly in cabin (lift and maybe a few sections) And I think easy to set up for beginners.
So I vote for the MCP on the autosteer board 
Looked at your picture of board, which I like with the fuses, but if you have not already spotted it yourself : A0 A1 and A2 did not move down together with the 3 connectors.
Yes thank you, part of the cleanup.
So I just built a couple of PCB V2 and. I really think the mma and ads 1115 should have some kind of support like kaupi board.
Why are you concerned about the ADS1115? Perhaps the lack of MMA support motivates AOG users to go for the brick? Of course I wouldn’t mind having support poles or holes for those. It would likely be safe to drill a hole and put a plastic support pole? Just need to know where.
well it is set up for the 8452 MMA how do you use the brick? Do you mount it off the board somewhere.?
Isnt the brick for heading? or am i confused.
I just use some hot glue.
yeah ill probably do something like that. But the Kaupi board has a post under it that looks like it would work good 
Sorry kansasfarmer, my mistake, confused MMA and BNO because I don’t use either one. Have DOG2 and brick instead.
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Hi, I’m new and I’m following topics of great interest. My opinion may be silly (I don’t have much experience).
In my opinion, the relay board should be in a separate sprayer box.
Why not use rs485 so we only have 2 wires between the tractor and the sprayer or 4 wires if we count the power.
I apologize for my English (I translate with google translate).
Congratulations !!!
You’ll need a second serial port (arduino nano only has 1 hardware serial) and an rs485 converter
I customized these so they were a little longer and glued to the PCB after printing. Can make it into a dual snap for the MD13 as well.
I like the 5V and ground by the SCL / SDA. Also good to have the second ground with a different orientation, hard to get wires into the screw terminals otherwise.
Me too. Handy mans second secret weapon
I used stand offs that had a dab of silicone or hot glue to secure them to the pcb.
Hello
Would such a module be suitable for relay control
Thank you
It would, most of the code is already in the autosteer module to drive the 23017, so really easy! If you could find one with the relays on it as well, that would be good
Did a board design going forward get decided on?
Edit: Did you post the code for the relay board as well? Nice to see you got it working
True, but there are serious advantages for RS485: withstands short circuits to 0V and 12V, immune to all kind of CM noise due to differencial signal, two-wire half-duplex. That’s why all non-ethernet PLCs use RS485 (or CAN, but that’s more complex). USB-to-RS485 sticks ship for $1 from China, so yes, of course, you need a converter, but the costs really don’t matter. Consider the stress you have with non- reliable stuff… 
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