This class allows send the specified commands to a meter connected with an IrDA or RS485 adapter to a ser2net router. Some commands can be found in the comments, a complete description of Mercury 230 protocol is available here.
// Router or adapter IP address and port, meter address (the last two digits of the serail number)
$meter = new Mercury230('tcp:https://ip', 'port', 'address');
// Open connection
$meter->open();
// Send commands to the meter
// Get the meter information
$info = $meter->get_meter();
// Get energy at the moment
$moment = $meter->get_moment();
// Get stored energy (daily and total)
$stored = $meter->get_stored();
// Send custom command
$command = $meter->send('0800');
...
// Close connection
$meter->close();
There are several ways to get counter data in Home Assistant. For example, you can do this via JSON response and automation in Node-RED. Sample json.php response:
Another way is to publish data to an MQTT topic. See how to do it in mqtt.php. Don't forget to install dependencies with:
composer install
An example of a cron job to publish data to MQTT:
moment values every 10 minutes
*/10 * * * * root /usr/bin/php /path/to/mqtt.php
stored values once a day
11 0 * * * root /usr/bin/php /var/www/smart.home/public/energy/mqtt.php stored
It's also possible to use wget to run the script:
11 0 * * * root /usr/bin/wget -O- https://smart.home/energy/mqtt.php?mode=stored >> /dev/null
After that you can add sensors to your Home Assistant configuration.yaml
sensor:
- platform: mqtt
name: "Energy T1"
state_topic: "homeassistant/sensor/energy/stored"
device_class: energy
unit_of_measurement: "kWh"
value_template: "{{ (value_json.t1 | int * 0.001) | round(2) }}"
- platform: mqtt
name: "Energy Volt 1"
state_topic: "homeassistant/sensor/energy/moment"
device_class: voltage
unit_of_measurement: "V"
value_template: "{{ (value_json.U1 | int * 0.01) | round(2) }}"
...
A complete list of sensors can be found in homeassistant_config.yaml