Dragino LTC2, User Manual

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LTC2 LoRaWAN Temperature Transmitter
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0x1422 0x1422/100 = 51.54
℃
0x1422/10 = 515.4
℃
0x1422/100 = 51.54
Ω
0xEC2D (0xEC2D - 65536)/100
= - 50.75
℃
(0xEC2D - 65536)/10
= - 507.5
℃
(0xEC2D - 65536)/100
= - 50.75
Ω
✓
Unix TimeStamp
Refer to Datalog feature.
Example Uplink Payload :
Uplink payload example 1:0CE9011422EC2D6073E83B
➢
Bat voltage:0x0CE9 =3305mV
➢
Ext=0x01
➢
Channel1 temp=0x1422/100=51.54
℃
➢
Channel2 temp=0xEC2D/100= - 50.75
℃
➢
System timestamp=0x6073E83B= 1618208827(UTC)
Uplink payload example 2:0CED020203FE056073E697
➢
Bat voltage:0x0CED =3309mV
➢
Ext=0x02
➢
Channel1 temp=0x0203/10=51.5
℃
➢
Channel2 temp=0xFE05/10= - 50.7
℃
➢
System timestamp=0x6073E697=1618208407(UTC)
Uplink payload example 3 :0CE9032EDE1F406073E967
➢
Bat voltage:0x0CE9 =3309mV
➢
Ext=0x03
➢
Channel1 res=0x2EDE/100=119.98 ohm
➢
Channel2 res=0x1F40/100=80.00 ohm
➢
System timestamp=0x6073E967= 1618209127(UTC)
2.5 Datalog Feature
LTC2 will auto get the time from LoRaWAN server during Join, and each uplink will then include a
timestamp. When user want to retrieve sensor value, user can send a poll command from the IoT
platform to ask sensor to send value in the required time slot.
LoRaWAN server must be v1.0.3 or higher, if LoRaWAN server doesn’t support this time request,
user can manually set the timestamp.
2.5.1 Unix TimeStamp
LTC2 uses Unix TimeStamp format base on