netvox R718CN2 User Manual page 7

Tips
1. Battery Voltage:
The voltage value is bit 0 ~ bit 6, bit 7=0 is normal voltage, and bit 7=1 is low voltage.
Battery=0xA0, binary=1010 0000, if bit 7= 1, it means low voltage.
The actual voltage is 0010 0000 = 0x20 = 32, 32*0.1v =3.2v
2. Version Packet:
When Report Type=0x00 is the version packet, such as 0116000A0B202005200000, the firmware version is 2020.05.20
3. Data Packet:
When Report Type=0x01 is data packet.
4. Signed Value:
When the temperature is negative, 2's complement should be calculated.
Device DeviceType
R718CK2 0x16
R718CT2 0x17
R718CN2 0x18
Example 1 of Uplink: 0116012400FD0109000000
st
1 byte (01): Version
nd
2 byte (16): DeviceType 0x16－R718CK2
rd
3 byte (01): ReportType
th
4 byte (24): Battery, 24H
th th
5 6 byte (00FD): Temperature1, 00FD H
th th
7 8 byte (0109): Temperature2, 0109 H
th th
9 -11 byte (000000): Reserved
Example 2 of Uplink: 0117019FFF39FEC5000000
st
1 byte (01): Version
nd
2 byte (17): DeviceType 0x17－R718CT2
rd
3 byte (01): ReportType
th
4 byte (9F): Battery, 1F H
th th
5 6 byte (FF39): Temperature1, FF39 H
th th
7 8 byte (FEC5): Temperature2, FEC5 H
th th
9 -11 byte (000000): Reserved
ReportType
Battery
0x01
(1Byte, unit:0.1V)
=36 D , 36x0.1v = 3.6v
ex ec
=253 D
ex
=265 D
ex ec,
= 31 D , 31x0.1v=3.1v
ex ec
= -199 D
ex
= -315 D
ex
NetvoxPayLoadData
Temperature1
(Signed2Bytes,unit:0.1°C)
, 253x0.1°C = 25.3°C
ec
265x0.1°C = 26.5°C
,-199 x 0.1°C = -19.9°C
ec
-315 x 0.1°C = -31.5°C
ec,
6
Temperature2
(Signed2Bytes,unit:0.1°C)
// low battery
Reserved
(3Bytes,fixed 0x00)