Connecting AirPoint - M (metering) to WebHMI

This version of the AirPoint module is intended for reading data from heat meters via the M-bus protocol and transmitting telemetry data via the MQTT protocol to data collection systems.

Features

Compatible meters: DIEHL Scylar INT, Siemens FUE950, Danfoss Infocal, and their equivalents
Connection using a standard connector (included with the module) instead of the communication board of the heat meter
Energy saving polling cycle

Connection method

The module connects to a meter with edge connector right to the extension module slot.

M-bus protocol

All meters are read with “REQ-UD2” request using broadcast address. The M-bus tags are mapped onto statndard AirPoint's MQTT topics:

Value	Description	Units	Mapped to
FWT	Forward temp.	°C	“temp_int”
RET	Return temp.	°C	“temp_ext”
E	Energy	Gcal	“counter_in1”
VOL	Volume	m3	“counter_in2”
Q	Flow	m3/hour	“hum_int”

Connection with Sontex SuperCalc531

The AirPoint - M can be connected to the heatmeter w/o extra communication module.

Connection with PolluTherm X