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I have 3 UH50 heatmeters that is battery operated. They only update data each 15min. What is the correct way to set up LM as GW for these devices?
I use a MBus to RS232 gateway.
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That's probably right, but when the meter only sends each 15mn, it is in sleep mode the remaining time. It's turning into quite a challange to sync LM and meter.
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M-Bus provides both data and power over two-wire connection. This means that the M-Bus module is permanently powered even though the meter itself uses battery power. You can probably read the data at any time but it won't be real-time measurements.
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None of the meters are responding to adress scans eighter.. It was based on that I thought that values only was available every 15min.
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Have you configured short address on each meter? M-Bus module might use a different baud rate like 1200 or 4800.
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You have outdated firmware.