LKM LKM75X, Manual Relating To The System Components

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14
9. Appendix 1
Interface protocol USB and RS485 (not Modbus)
Byte 0…3
Sensor type
Byte 4…11 IEEE address
Byte 12
…13 PAN-ID
Byte 14…22 4xdata à 2Byte
Byte 23 Hop (number of intermediate stations)
Byte 24 Battery status
Byte 25 RSSI (field intensity)
Interface protocol for Modbus
For further information, please refer to the Modbus manual.
Register No. Assignment Example Remarks
xxxx1
Device type transmitter 1
H
0x0000
xxxx2
Device type transmitter 1
L
0x1202 LKM75xFT
xxxx3 IEEE address H1 0x0015
xxxx4 IEEE address L1 0x8d00
xxxx5 IEEE address H0 0x0008
xxxx6 IEEE address L0 0x23CD
xxxx7 PAN ID 0xBAFF
xxxx8 Temperature 0x00EA 23.4°C
xxxx9
Analogue 2
0x0230
In general, the moisture value in the
case of transmitters with SHTxx,
here 56.0% r.h.
xxx10 Analogue 3 0x0000 In general 0, available only in the
case of special transmittes
xxx11 Analogue 4 0x0000 In general 0, available only in the
case of special transmitters
xxx12 Battery/Lost-Connect/ LQI 0x00FF Battery OK (H) LQI = 255 (L)
xxx13 Reserve 0x0000
xxx14 Reserve 0x0000
xxx15 Reserve 0x0000