But I need 3 additional push buttons, which I would have connected to any available X or Y socket.
But all sockets are used already.
Can anyone tell me if these modules would leave 3 GPIO’s free, so I could squeeze my buttons in between by breakout boards?
At least my Prototype would be built from std Gadgeteer modules. Hope they fit in a standard German socket ‘box’. (Except USB Module, This I would replace with power only when mounted to wall.)
For the outer part I would use my old Temperature controller housings from Bush Jäger (The display + 3 buttons should just fit in
The valves would be controlled by a standard RS485 capable Dig Out Module with built in relais for 230V (like ICP CON I-70 61 I-7061/I-7061D)
Does anyone know a nice Relay out module I can control via RS485?
The one that I hade in mind (I-7061/I-7061D) costs over 100€.
I need about 8 independent relays (normaly open) for 230V 1Amps.
The protocol does not rally matter (DCON, Modbus RTU, …)
I’ve been think about using the Rel16 module + MedusaMini + RS485, but that’s also not really cheap, and if the pins are open on the bottom of the relays board (as I assume) I have to take care of that too (250V).
Also 16 Relays are too much. There was a 4 Relay module. But I can’t find it in the catalog anymore.
I agree, a DIY mains relay is not for the faint at heart. I personally would be cautious about doing this, but honestly you really don’t get many alternatives, particularly if you’re wanting to have a specific number of relays. I did buy a “powertail” device in case I wanted to switch a single device (haven’t yet used it though) but even this only goes a small way to removing the risk.
I need 7 or 8 relays at one place and 5 at a second place.
So I thought a 8 Relay module would be perfect.
But I don’t want anything that has open pins or a open circuit board.
RS485 is because I need a bus system that can go through the whole house.
Wireless would be an option, but since I can easily put new/additional wires from on spot to another, a wired bus makes more sense.
Ethernet is usually more expensive as RS485, and I have often used RS485 at work already.
If I read the schematics correct it does not matter by which socket I apply the 3.3 and 5V to Medusa Mini.
So I could supply it lets they through the U Socket and only connect a cable to PROG Socket when I want to do a update.
But what happens when the Board already has Power and I additionally connect a USB-Client SP, which also applies power?
I would assume that nothing happens, and the needed power is drained half/half from both sources.
Any one who thinks different?
Can anyone answer my question from my last post, about applying 2 power sources providing 3v3 and 5v0?
I don’t want to kill my Medusa when I finally get it.
I tried to read the USB DP module schematics, but I’m not sure what all the components are for.
It is not recommended to use two power sources on the same board. However, based on the senario that you came up with, you could keep the power USB to SP module left in the PROG socket and use the non powered USB to Serial in the U socket.
@ Aron - It’s a bit different.
I do not have enough space to let the USB SP connected.
For programming I would open the housing and connect the USB SP to the unused PROG socket.
After update I would remove it and the module is powered by the U socket where a RS485 module is connected (and the power is injected by something in the middle).
So for programming / debugging I would have 2 power sources.
Optionally I can power it via PROG socket, and for updating I disconnect external power source and connect USB SP module.
Might be easier anyway then ripping of the cable to RS485.