12/14/2023 0 Comments Sontex supercal 531I did order a 280T and received the slightly different 280T-S but it’s working for me so it’s ok.įor anyone new digging in, the values returned for data are actually decimal and not hex and the data bytes are ordered right to left. based, although I doubt their manufacturing is. Thanks for all the work comparison, here’s some example data from my SpireMT 280T-S which appears to be a relative of the Shenitech STUF-280T. If anyone finds the reader useful and would like to contribute further VIF details, I would welcome contributions. If (val=0x75) Serial.print("Duration minutes") If (val=0x70) Serial.print("Duration seconds") If (val=0圆D) Serial.print("TIME & DATE") If (val=0x3e) Serial.print("Volume Flow m3/h") If (val=0x5f) Serial.print("Return Temp C") If (val=0x5b) Serial.print("Flow Temp C") I’ve entered the vif codes for a small number of the potential variable types, see lines 201 to 215: if (val=0x06) Serial.print("Energy kWh") The reader currently implements a basic data packet decode. Troubleshooting: If no acknowledgement is received make sure Arduino serial line ending is set to “Both NL & CR” and the serial monitor baudrate is set to 115200. This is what the reply looks like from the third page of the Sontex 531 Heat Meter: Command sent: request data To read a frame of data from the M-Bus meter, enter character ‘n’ and press enter. If the meter receives the command it will reply with an acknowledgement (ACK). Some M-Bus meters store multiple pages of results, to access pages other than 1 enter character ‘p’ with the page number immediately appended e.g: ‘p2’ and press enter. Command sent: set address 100Įnter character ‘n’ and press enter. The MBUS address to set is hard coded in the MBUS_Reader firmware. In the Arduino Serial Monitor enter character ‘a’ and press enter. After uploading to the Heatpump Monitor or Arduino with the M-Bus reader circuit, the following options should be presented: Arduino M-Bus reader This is also available in the HeatpumpMonitor repository here:Ī quick example of what the MBUS_Reader tool can do. ![]()
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