This is a new heat pump monitor board designed specifically for interfacing with MID standard electricity and heat meters via MBUS or/and Modbus. It has a RaspberryPi at it’s core running our emonSD image enabling local or/and remote logging and data visualisation.
It is designed for monitoring heat pump electricity consumption, heat output and system temperatures for detailed performance analysis & troubleshooting.
- MBUS Reader (Reads from heat meters and some electric meters, though the SDM120-MBUS is no longer recommended)
- A Modbus Reader is recommended for reading from SDM120-Modbus electricity meters
- DS18B20 Temperature sensor connections
- 6 Digital input or outputs can be used for pulse counting
- I2C connection (uses 2 of the 6 digital IO's)
- RaspberryPi running the OpenEnergyMonitor emonSD image
This hardware design combines in a single unit a:
- RaspberryPi
- Heat pump monitoring baseboard
- USB to MBUS reader
Please read our guide on selecting the right heat meter here:
https://github.com/openenergymonitor/HeatpumpMonitor/blob/master/selectingheatmeter.md
The following setup instructions assume an assembled heat pump monitor kit as shown in the picture above, with pre-prepared SD card running the standard emonSD image inserted into the RaspberryPi (with SSH enabled, see Guide: Credentials).
-
Use the connection diagram above to connect MBUS meters, temperature sensors and power. There are two A and B MBUS terminals that can be used to simplify connecting two meters to the MBUS reader. Make sure that the power supply is capable of supplying 2A e.g OpenEnergyMonitor Shop 5V USB Power Adapter (MBUS data corruption can occur if the power supply output is too low).
-
Power up the unit, wait a couple of minutes for the Pi to create a WiFi access point. Connect to the access point and then use the WiFi configuration interface to connect the unit to your home WiFi. See Guide: Connect for full details.
-
If you have connected DS18B20 temperature sensors a couple of minor steps are required to enable reading from DS18B20 temperature sensors on the Pi. Follow steps 1 to 4 here EmonHub Interfacers: Direct DS18B20 temperature sensing.
-
EmonHub is piece of software running on the Pi that reads from the connected MBUS meters and DS18B20 temperature sensors. It then forwards the data to a seperate piece of software called Emoncms for data storage and visualisation. EmonHub is configured using a configuration file located at: /etc/emonhub/emonhub.conf. A configuration example is included at the bottom of this page for reading from a SDM120-MBUS electricity meter, a Qalcosonic E3 heat meter and DS18B20 temperature sensors. Overwrite the existing default configuration with this configuration as it is a better starting point for our requirements.
-
Configure EmonHub MBUS settings. The default MBUS configuration settings below assumes that a suitable heat meter is connected on address 1. You may need to adjust the MBUS address of either of the meters to ensure that they are not both on the same address. See instructions in the forum post here on how to do this: https://community.openenergymonitor.org/t/reading-from-multiple-mbus-meters-with-the-emonhub-mbus-interfacer/18159
-
Example configuration with a Sontex 531 heat meter:
[[MBUS]]
Type = EmonHubMBUSInterfacer
[[[init_settings]]]
device = /dev/ttyAMA0
baud = 2400
[[[runtimesettings]]]
pubchannels = ToEmonCMS,
read_interval = 10
validate_checksum = False
nodename = mbus
[[[[meters]]]]
[[[[[sontex]]]]]
address = 1
type = sontex531
- With the hardware connected up and the settings in place, data should now be coming in and be listed as inputs in Emoncms.
...
...
Reading from a SDM120-MBUS electricity meter and a Qalcosonic E3 heat meter. These, or similar meters would usually be installed as part of heat pump installation.
Note: The SDM120-MBUS electricity meter is no longer recommended due to reliability issues. We now recommend to use a SDM120-Modbus meter with a seperate Modbus reader. See forum post: https://community.openenergymonitor.org/t/sdm120-mbus-meter-freezing-drop-out/20765/2
The following is a full /etc/emonhub/emonhub.conf example that reads from any connected DS18B20 temperature sensors, a Sontex Superstatic 440 heat meter with Multical 531 integrator on MBUS and a SDM120-Modbus electricity meter. Data is forwarded to the local emoncms installation using MQTT and the remote emoncms installation via HTTP.
[hub]
loglevel = DEBUG
[interfacers]
[[DS18B20]]
Type = EmonHubDS18B20Interfacer
[[[init_settings]]]
[[[runtimesettings]]]
pubchannels = ToEmonCMS,
read_interval = 10
nodename = temperatures
[[MBUS]]
Type = EmonHubMBUSInterfacer
[[[init_settings]]]
device = /dev/ttyAMA0
baud = 2400
[[[runtimesettings]]]
pubchannels = ToEmonCMS,
read_interval = 10
validate_checksum = False
nodename = mbus
[[[[meters]]]]
[[[[[sontex]]]]]
address = 1
type = sontex531
[[SDM120]]
Type = EmonHubSDM120Interfacer
[[[init_settings]]]
device = /dev/ttyUSB0
baud = 2400
[[[runtimesettings]]]
pubchannels = ToEmonCMS,
read_interval = 10
nodename = SDM120
[[MQTT]]
Type = EmonHubMqttInterfacer
[[[init_settings]]]
mqtt_host = 127.0.0.1
mqtt_port = 1883
mqtt_user = emonpi
mqtt_passwd = emonpimqtt2016
[[[runtimesettings]]]
pubchannels = ToRFM12,
subchannels = ToEmonCMS,
nodevar_format_enable = 1
nodevar_format_basetopic = emon/
[[emoncmsorg]]
Type = EmonHubEmoncmsHTTPInterfacer
[[[init_settings]]]
[[[runtimesettings]]]
pubchannels = ToRFM12,
subchannels = ToEmonCMS,
url = https://emoncms.org
apikey = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
senddata = 1
sendstatus = 1
sendinterval= 30
[nodes]
Forum post: Reading from multiple MBUS meters with the EmonHub MBUS interfacer
https://community.openenergymonitor.org/t/reading-from-multiple-mbus-meters-with-the-emonhub-mbus-interfacer/18159