Buderus KM200 Reader

Description

Buderus KM200 Reader provides functionality to read datapoint data from Buderus KM200 communication module.

The base functionality was translated from demel42's IP-Symcon module https://github.com/demel42/IPSymconBuderusKM200/. Further description of supported devices can also be found there.

To translate decryption algorithm, this source was used: https://stackoverflow.com/questions/19719294/decrypt-string-in-c-sharp-that-was-encrypted-with-php-openssl-encrypt.

Tested hardware

This library was tested with a Buderus heat pump heating system (indoor unit IDU-8), equipped with following modules:

• Buderus Logamatic HMC300
  • Software version NF13.06
• "Internet module"
  • Internal gateway module, included in tower, no specific name
  • Details shown in menu of main unit:
    • Internet module: KMx
    • Software version 04.07
  • Details read from the interface via it's datapoints
    • Hardware version: iCom_Low_NSC_v1 (/gateway/versionHardware)
    • Software version: 04.07.05 (/gateway/versionSoftware)

Sample response from device

Query URL: http://device-address-and-port/system/sensors/temperatures/outdoor_t1

Decrypted response:

{
    "id": "/system/sensors/temperatures/outdoor_t1",
    "type": "floatValue",
    "writeable": 0,
    "recordable": 1,
    "value": 0.6,
    "unitOfMeasure": "C",
    "state": [
        {
            "open": -3276.8
        },
        {
            "short": 3276.7
        }
    ]
}