This is a plugin for the free open-source Domoticz home automation system that read and write some parameters from/to the Emmeti Mirai heat pump by Modbus connection (RS485 serial connection).
Emmeti Mirai heat pumps have a RS485 port designed to communicate by Modbus protocol with Emmeti Febos-HP device which read the power from the electricity grid and set the maximum compressor frequency (power) that the heat pump can use to improve own-consumption.
Who already have a domotic system and photovoltaic on the roof, do not need to reinvent the wheel installing Febos-HP: they can use an automation (LUA script?) that controls the heat pump in this way:
- increase the heat pump power consumption in case that energy is exported to the grid (solar photovoltaic is producing more than house usage), increasing the self-consumption
- in the Winter, act as a smart thermostat that increases the room temperature setpoint (overheating) in case of excess photovoltaic production, to get the heat pump off in the evening/night
- in the Summer, activates the heat pump only if there is enough solar photovoltaic production, consuming Zero Watt from the electrical grid
A LUA script for Domoticz that controls the Emmeti Mirai heat pump is available in github.
Anyway, using this plugin is possible to read and change main heat pump parameters manually.
Plugin is tested using Emmeti Mirai SMI EH1018DC with firmware Rev.C: please note that different heat pump firmware version lead to different register address.
This software comes with absolute no warranty. Please check the manual to verify that modbus address registers meets the plugin configuration (check next section).
This plugin can be installed from Python Plugin Manager or Python Plugins Manager which also permit to update plugin easily or automatically.
Alternatively, it's possible to give the following commands from the linux shell:
cd ~/domoticz/plugins
git clone https://github.com/CreasolTech/domoticz-emmeti-mirai
Then, in the future, to update the plugin it's possible to simply type
cd ~/domoticz/plugins/domoticz-emmeti-mirai
git pull
Used python modules: minimalmodbus -> http://minimalmodbus.readthedocs.io
Please edit the plugin.py file and check that register address of your heat pump are exactly the ones specified in the configuration (second field in the parameter list).
Restart Domoticz, then go to Setup -> Hardware and add the Emmeti Mirai heat pump plugin, specifying a name for that hardware and the serial port to connect heat pump.
Plugin can be easily translate in other languages: just add the language code to LANGS variable, and add a field to each device with the translated name of device. Please send a copy of the plugin.py file to linux at creasol dot it
Many thanks to:
- Patrick Hamers, who developed the plugin for SPRSUN heat pump
Our industrial and home automation modules are designed to be
- very low power (around 10mW with relays OFF)
- reliable (no disconnections)
- bus connected (no radiofrequency interference, no battery to replace).
Modules are available in two version:
- with DomBus proprietary protocol, working with Domoticz only
- with Modbus standard protocol, working with Home Assistant, OpenHAB, Node-RED
Store website - Information website
- Single-phase and three-phases, up to 36A (8kW or 22kW)
- Needs external contactor, RCCB (protection) and EV cable
- Optional power meter to measure charging power, energy, voltage and power factor
- Optional power meter to measure the power usage from the grid (not needed if already exists)
- Two max grid power thresholds can be programmed: for example, in Italy who have 6kW contractual power can drain from the grid Max (6* 1.27)=7.6kW for max 90 minutes followed by (6* 1.1)=6.6kW for another 90 minutes. The module can use ALL available power when programmed to charge at 100%.
- Works without the domotic controller (stand-alone mode), and can also work with charging current set by the domotic controller (managed mode)
DomBusTH - Compact board to be placed on a blank cover, with temperature and humidity sensor and RGW LEDs
Includes:
- temperature and relative humidity sensor
- red, green and white LEDs
- 4 I/Os configurable as analog or digital inputs, pushbuttons, counters (water, gas, S0 energy, ...), NTC temperature and ultrasonic distance sensors
- 2 ports are configured by default as open-drain output and can drive up to 200mA led strip (with dimming function) or can be connected to the external module DomRelay2 to control 2 relays; they can also be configured as analog/digital inputs, pushbuttons and distance sensors.
- analog/digital inputs
- pushbutton and UP/DOWN pushbutton
- counters (water, gas, S0 energy, ...)
- NTC temperature and ultrasonic distance sensors
- 2 ports are configured by default as open-drain output and can drive up to 200mA led strip (with dimming function) or can be connected to the external module DomRelay2 to control 2 relays.
- 2x relays SPST 5A
- 1x 10A 30V mosfet (led stripe dimming)
- 2x 0-10V analog output: each one can be configured as open-drain output to control external relay
- 2x I/O lines, configurable as analog/digital inputs, temperature/distance sensor, counter, ...
- 2x low voltage AC/DC opto-isolated inputs, 9-40V
- 1x 230V AC opto-isolated input
- 6x relays SPST 5A
- 2x relays STDT 10A
- Only 10mW power consumption with all relays OFF
- Only 500mW power consumption with all 8 relays ON !!
- 3x relays SPST 5A
- 3x 115/230Vac optoisolated inputs
- Single common for relays and AC inputs
- 5x general purpose I/O, each one configurable as analog/digital inputs, pushbutton, counter, temperature and distance sensor.
- 3x relays SPST 5A
- 3x 115/230Vac optoisolated inputs
- Single common for relays and AC inputs
- 5x general purpose I/O, each one configurable as analog/digital inputs, pushbutton, counter, temperature and distance sensor.
Each relay can toggle the existing step-relay, switching the light On/Off. The optoisolator monitors the light status. The 5 I/Os can be connected to pushbuttons to activate or deactivate one or all lights.
- 12x relays SPST 5A
- Relays are grouped in 3 blocks, with a single common per block, for easier wiring
- Only 12mW power consumption with all relays OFF
- Only 750mW power consumption with all 12 relays ON !!
- 12x low voltage inputs (analog/digital inputs, buttons, alarm sensors, counters, temperature and distance sensors, ...)
- 3x 115/230Vac optoisolated inputs
- 2x relays SPST 5A
- 1x relay SPST 10A
- In12 port can be used to send power supply to an external siren, monitoring current consumption
- 2x 5A 12V SPST relays (Normally Open contact)
- Overvoltage protection (for inductive loads, like motors)
- Overcurrent protection (for capacitive laods, like AC/DC power supply, LED bulbs, ...)
- 9-24V input voltage, with high efficiency DC/DC regulator with 5V output
- 4x SPST relays 5V with overvoltage protection
- 1x SSR output (max 40V output)
- 2x mosfet output (max 30V, 10A) for LED dimming or other DC loads
- 1x I²C interface for sensors, extended I/Os and more)
- 1x OneWire interface (DS18B20 or other 1wire sensors/devices)