Preferred router settings June 30, 2025 12:45 Updated For the dongle to work properly, the following ports must be open in your router: SNTP: time server 123 TLS azure connection: 8883 Modbus (local): 502 Related to Energy manager @home Related articles Requirements for correct functioning of the dongle My home network is not displayed in the list Which devices are compatible with the Energy manager? Installation guide How to determine my maximum peak consumption?