Energy Meter configuration
Arska can read imported and exported energy information from HAN P1 enabled smart meters (installed by your grid company) or from a separately installed Shelly 3EM energy meter.
A direct connection to the energy meter via the adapter enables almost real-time monitoring of consumption. The meter sends measurement data at least once every 10 seconds. This requires that the meter installed by the network company has a HAN P1 port. In Finland, the installation of meters began in 2022, and in the coming years all meters will be replaced with new meters.
The serial adapter package includes cables for a energy meter with a HAN P1 port (RJ12 connection) and ESP32 boards (Olimex) with an UEXT interface. If your ESP32 device is not equipped with UEXT interface you can connect your MCU to the adapter with 3 wires: RXD, 3.3V and GND. You can buy an adapter from Robomaa Oy.
- Energy Meter:
HAN P1 wired - GPIO (RXD):
36(GPIO number of connected io pin. Depends on your hardware, e.g. 36 for Olimex boards with UEXT connection.)
Shelly 3EM is a separate energy monitor metering you exported and imported energy. To read grid data from Shelly 3EM energy meter it should be connected to the local wifi. More information you can find in Shelly's documentation. Leave installation of the meter to the main current to certified electrician professionals.
Check that Shelly gets a fixed IP address. Use Shelly configuration or get a fixed IP address from your wifi router.
Shelly 3EM 3 Phase Energy Meter and Contactor Control, Image: https://shop.shelly.cloud/
- Set NTP time server, e.g. time.google.com
- Set password (RESTRICT LOGIN)
- Energy Meter:
Shelly 3EM - Host: ´admin:password@192.168.1.2´ (use password and IP address of Shelly installed), if you do not use a password (not recommended) enter the IP address of Shelly only.
- Port: 80
HomeWizard Wi-Fi P1 Meter (HWE-P1-G1) is a wifi-enabled connector module plugged into a modern smart energy meter (installed by your grid company) with a compatible P1 port. Tested with Aidon 7534 (Helen Sähköverkko), HWE-P1-G1 firmware version 4.14. More infomation by Helen Sähköverkko:
Install the meter according to the manufacturer's instructions. You may need to use an additional external power source before the device software is updated to the latest version.
- Energy Meter:
HAN P1 telegram - Host:
192.168.1.2(IP address of the HWE-P1-G1 device. Check from your wifi router.)