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Creasol DomBus12 is a compact module, 40x30x11mm, with 9 configurable inputs/outputs.
It can be connected to the Domoticz controller by a RS485 serial bus (4 wires, 2 for 12/24V power supply, and 2 for data at 115200bps).
As other DomBus devices, DomBus12 is designed to consume low power, be reliable, fully configurable and easy to use.
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Creasol DomBus12 is a compact module, 40x30x11mm, with 9 configurable inputs/outputs.
It can be connected to the Domoticz controller by a RS485 serial bus (4 wires, 2 for 12/24V power supply, and 2 for data at 115200bps).
As other DomBus devices, DomBus12 is designed to consume low power, be reliable, fully configurable and easy to use.
Default address: 0xff12
Port# | Name | Capabilities | Default configuration | Description |
1 | IO | IN_DIGITAL, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER, OUT_DIGITAL | IN_TWINBUTTON | Input, with optional pullup (pcb jumper) |
2 | IO2 | IN_DIGITAL, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER, OUT_DIGITAL | IN_TWINBUTTON | Input, with optional pullup (pcb jumper) |
3 | IO3 | IN_DIGITAL, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER, OUT_DIGITAL | IN_TWINBUTTON | Input, with optional pullup (pcb jumper) |
4 | IO4 | IN_DIGITAL, IN_ANALOG, IN_TWINBUTTON, IN_COUNTER, OUT_DIGITAL | IN_TWINBUTTON |
Input, with optional pullup (pcb jumper) |
5 | IO5 | IN_DIGITAL, IN_ANALOG, OUT_DIGITAL, OUT_RELAY_LP, OUT_BLIND, OUT_DIMMER | OUT_DIGITAL | Open-drain output, 60V 100mA capability, suitable to be connected to an external relay. With 2 pcb jumpers it's possibile to bypass mosfet and use this port as normal input/output. |
6 | IO6 | IN_DIGITAL, IN_ANALOG, OUT_DIGITAL, OUT_RELAY_LP, OUT_BLIND, OUT_DIMMER | OUT_DIGITAL | Open-drain output, 60V 100mA capability, suitable to be connected to an external relay. With 2 pcb jumpers it's possibile to bypass mosfet and use this port as normal input/output. |
7 | IO7 | IN_DIGITAL, IN_ANALOG, IN_COUNTER, OUT_DIGITAL, OUT_BLIND, OUT_DIMMER | IN_DIGITAL | Input, with optional 150 ohm resistor that can be enabled by pcb jumper to drive external buzzer or relay board within relay driver |
8 | IO8 | IN_DIGITAL, IN_ANALOG, IN_COUNTER, OUT_DIGITAL, OUT_BLIND, OUT_DIMMER, OUT_BUZZER | IN_DIGITAL | Input, with optional 150 ohm resistor that can be enabled by pcb jumper to drive external buzzer or relay board within relay driver |
9 | IO9 | IN_DIGITAL, IN_ANALOG, IN_COUNTER, OUT_DIGITAL, OUT_BLIND, OUT_DIMMER, OUT_BUZZER | IN_DIGITAL | Input, with optional 150 ohm resistor that can be enabled by pcb jumper to drive external buzzer or relay board within relay driver |
(1): can be used as BLIND output, to open a blind/curtain, but only the previous port can be configured in Domoticz as OUT_BLIND because, when configured as OUT_BLIND, DomBus device automatically configure the next port to drive a relay in open direction.
Just connect the two open-drain outputs to the 2-relays module by any type of cable (for example a standard 4x0.22mm²).
These outputs can be configured as OUT_DIGITAL or, better, as OUT_RELAY_LP: in this case the relay power consumption will be 1/3 or less.
Many energy meters, like Eastron SDM230, provide 2 pulse outputs to count the import and export energy, 1 pulse every Wh.
Using DomBus12, DomBus23 or DomBusTH it's very easy to read the pulses from energy meters, compute the instant power and get two devices in Domoticz that show the usage and return power, usage and return total energy and graphs. Below the instructions when SDM230 is used (but check the manual of your energy meter to connect it):
Domoticz needs up to 5 minutes before updating the energy counter correctly.
Water and gas meter usually have an optoinsulated output that generate a pulse every 0.NNN m³.
Connecting that output to an I/O input of DomBus12, or DomBus23 or DomBusTH, and common output to GND, it's possible to get an incremental counter in Domoticz measuring water, gas, and anything else: counter divider, meter offset and unity of measure can be specified in Domoticz.
The I/O device connected to the meter should be configured in this way: click Edit on the domoticz device, write the appropriate name (for example Water_Meter), replace the current device type (e.g. IN_DIGITAL) in the Description field with IN_COUNTER and save: the device will be moved to the Utility panel and is ready to count pulses.
The following schema shows how to use this home automation module to control some alarm sensors (PIR, to detect movements inside a room, and 4 magnetic contact sensors applied to windows, doors and blinds, to detect the open state and transition), and also command 2 loads (light and dehumidifier, for example) by using the additional DomRelay2 board (within 2 relays) placed near the loads and connected to DomBus12 by a small wire cable.
Both DomBus12 and DomRelay2 are very small modules that can fit everywhere.
The two buttons are connected together by a 4k7 resistor and connected to a single input wire: this configuration is called "twinbutton" and permits to use 2 buttons for each module input, and is normally used by double buttons with the function UP/DOWN (applied to roller shutters, for example) or ON/OFF.
DomBus12, DomBus23, DomBus31 and DomBusTH have also the possibility to send command directly to other devices of the same family (and also to itsself), with the following gains:
Example: module address = 1201, with 2 buttons connected to port 1 and configured as IN_TWINBUTTON, with the following functions:
Short pulse on DOWN button to get light (connected to port 6 of module 1201) ON for 120s: DCMD(Pulse)=1201.6:ON:120s
2s pulse on DOWN button to toggle the same light ON/OFF without any timer: DCMD(Pulse2)=1201.6:TOGGLE
Short pulse on UP button to swith the dehumidifier (connected to port 5 of module 1201) ON for 2 hours: DCMD(Pulse)=1201.5:ON:2h
1s pulse to switch dehumidifer OFF: DCMD(Pulse1)=1201.5:OFF
To configure the port 1 of module 1201 in this way it's sufficient to edit the port 1 device in Domoticz, and write in the description all commands above:
IN_TWINBUTTON,DCMD(Pulse)=1201.6:ON:120s,DCMD(Pulse2)=1201.6:TOGGLE,DCMD(Pulse)=1201.5:ON:2h,DCMD(Pulse1)=1201.5:OFF
Then light and dehumidifier will work even if Domoticz is offline.
MORE INFORMATION AT https://www.creasol.it/CreasolDomBus12
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