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LTC2 LoRaWAN Temperature Transmitter

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0E64410B49800160A072B8

0E61410B3F800160A077680E61410B33800160A07C180E64410B2C8

00160A080C80E64410B28800160A085780E64410B24800160A08A280E64410B23800160A08ED

80E64410B22800160A09388

0E64410B1E800160A09838

Where the first 11 bytes is for the first entry:

0E64410B49800160A072B8

Bat voltage:0x0E64 =3684mV

poll message flag & Ext=0x41,means reply data,Ext=1

Channel1 temp=0x0B49/100=28.89

℃

Channel2 temp=0x8001/100=

-

327.67

℃

System timestamp=0x60A072B8= 1621127864(UTC)

2.6

Alarm Mode

LTC2 can monito the temperature in every CTTEMP time, when the temperature exceed the limit ,

it will uplink the sensor value immediately.

Detail commands see:

Enable Alarm Mode.

Config Alarm Sampling Time.

Set Alarm Threshold

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Summary of Contents for LTC2

Page 1: ...com LTC2 LoRaWAN Temperature Transmitter 1 32 LTC2 LoRaWAN Temperature Transmitter User Manual Document Version 1 1 Image Version v1 0 Version Description Date 1 0 Release 2021 May 17 1 1 Correct Inde...

Page 2: ...ow it works 8 2 3 Quick guide to connect to LoRaWAN server OTAA 8 2 3 1 Step 1 Create a device in TTN with the OTAA keys from LTC2 8 2 3 2 Step 2 Power on LTC2 12 2 4 Uplink Payload 13 2 4 1 Payload A...

Page 3: ...5 Print last few data entries 25 3 16 Clear Flash Record 25 4 Battery How to replace 26 4 1 Battery Type 26 4 2 Replace Battery 26 4 3 Power Consumption Analyze 26 5 Firmware Change Log and Upload Fir...

Page 4: ...red by 8500mA Li SOCI2 battery for long time measurement The battery can run 2 10 years depends on the network environment and working mode Each LTC2 has two internal 24 bit ADC interfaces and are cal...

Page 5: ...cy measure of resistance and upload Battery Monitoring and upload 1 3 Applications Logistics and Supply Chain Management Food management Cold chains solution Industrial Monitoring and Control 1 4 Hard...

Page 6: ...100 probe Installation Insert Cable Length 2m PT100 Class Class A Probe Dimension 4 30mm Measure Range 50 200 C Suitable Environment General environment LTC2 LT Low Temperature Version LTC2 with 1 x L...

Page 7: ...nge 50 200 C Suitable Environment Attached to the measure point LTC2 HT High Temperature Version LTC2 with 1 x high temperature PT100 probe Installation Insert Cable Length 3m PT100 Class Class A Prob...

Page 8: ...s to input the OTAA or ABP keys in the LoRaWAN network server so to register LTC2 will join the LoRaWAN network and start to transmit data The default period for each uplink is 20 minutes On each upli...

Page 9: ...w dragino com LTC2 LoRaWAN Temperature Transmitter 9 32 Below is TTN screen shot Create Application first Manually Add a LoRaWAN End Device device Choose OTAA and MAC v1 0 3 Input the OTAA keys for LT...

Page 10: ...ragino com LTC2 LoRaWAN Temperature Transmitter 10 32 Each LTC2 is shipped with a sticker with the default device EUI as below Input these keys to device portal Choose the Frequency band for this end...

Page 11: ...Transmitter 11 32 Input APP Key in this page as well Add payload formatter So TTNv3 knows how to parse the LTC2 upload value The payload for TTN can be found at below link https www dragino com downlo...

Page 12: ...hen ship from factory Put a Jumper on JP2 to power on the device After power on LTC2 will auto join to TTN network via the LoRaWAN coverage by DLOS8 After join success LTC2 will start to update messag...

Page 13: ...r time SYNC request is send device will set this bit to 0 until got the time stamp from application server Unix Time Request 1 Request server downlink Unix time 0 N A In this mode LTC2 will set this b...

Page 14: ...x0203 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...

Page 15: ...eq and server will reply with DeviceTimeAns to send the current time to LTC2 If LTC2 fails to get the time from server LTC2 will use the internal time and wait for next time request AT SYNCTDC to set...

Page 16: ...Timestamp start Timestamp end Uplink Interval Timestamp start and Timestamp end use Unix TimeStamp format as mentioned above Devices will reply with all data log during this time period use the uplin...

Page 17: ...ata If devise doesn t have any data in the polling time Device will uplink 11 bytes of 0 Example If LTC2 has below data inside Flash Flash Addr Unix Time Ext BAT voltage Value 8021630 systime 2021 5 1...

Page 18: ...t 11 bytes is for the first entry 0E64410B49800160A072B8 Bat voltage 0x0E64 3684mV poll message flag Ext 0x41 means reply data Ext 1 Channel1 temp 0x0B49 100 28 89 Channel2 temp 0x8001 100 327 67 Syst...

Page 19: ...on the wiki http wiki dragino com index php title End_Device_Downlink_Command Commands special design for LTC2 These commands only valid for LTC2 as below 3 1 Set Transmit Interval Time Feature Chang...

Page 20: ...T ENPTCHNUM 2 Enable channel 1 and 2 Downlink Command 0xA1 Total bytes 2 bytes Example 0xA101 same as AT ENPTCHNUM 1 0xA102 same as AT ENPTCHNUM 2 3 3 Set External Sensor Mode Feature Change External...

Page 21: ...mand Command Example Function AT TIMESTAMP 1611104352 OK Set System time to 2021 01 20 00 59 12 Downlink Command 0x306007806000 Set timestamp to 0x 6007806000 Same as AT TIMESTAMP 1611104352 3 6 Set T...

Page 22: ...e sync time is 10 days Downlink Command 0x29 0A Same as AT SYNCTDC 0x0A 3 8 Retrieve data Feature Retrieval data for specify time slot AT Command No AT Command only valid for downlink command Downlink...

Page 23: ...320FF380320 AT ARTEMP 200 800 200 800 A7000A0064000A0065 AT ARTEMP 10 100 10 101 Channel 1 operating temp 10 100 Channel 2 operating temp 10 101 Downlink Command See Poll Sensor Value 3 12 Set Calibra...

Page 24: ...0 37 44 1 3685 Temp1 28 78 Temp2 327 67 8021620 systime 2021 5 16 00 57 44 1 3684 Temp1 28 83 Temp2 327 67 8021630 systime 2021 5 16 01 17 44 1 3684 Temp1 28 89 Temp2 327 67 8021640 systime 2021 5 16...

Page 25: ...when read sensor data 1 systime 2021 5 17 03 12 37 1 3681 Temp1 26 01 Temp2 327 67 2 systime 2021 5 17 03 17 37 1 3682 Temp1 26 02 Temp2 327 67 3 systime 2021 5 17 03 22 37 1 3687 Temp1 25 94 Temp2 3...

Page 26: ...ntage to show the battery level Below is the battery performance Minimum Working Voltage for the LTC2 LTC2 3 0v 3 6v 4 2 Replace Battery Any battery with 3 6v can be a replacement We recommend to use...

Page 27: ...Life expectation in difference case will be shown on the right 5 Firmware Change Log and Upload Firmware User can use ST Link v2 to upgrade firmware into LTC2 for bug fix or new features The hardware...

Page 28: ...GND USB to TTL RXD LTC2 TXD USB to TTL TXD LTC2 RXD In PC User needs to set serial tool such as putty SecureCRT baud rate to 9600 to access to access serial console for LTC2 The AT commands are disabl...

Page 29: ...user do a calibration to eliminate the effect from the cables so to get the best accuracy Below is the step for calibrate on a three wire PT100 probes There is no step for 2 wire probe calibration at...

Page 30: ...know that each wire of PT100 has 0 594 0 002 2 0 296R Where 0 002 is the value we got from step 1 Step 3 Run Calibrate Command Run this command to both channels to use 0 296R calibrate resistance AT...

Page 31: ...oRa IC Working Frequency Best Tune Frequency Recommend Bands 433 SX1278 Band2 LF 410 525 Mhz 433Mhz CN470 EU433 868 SX1276 Band1 HF 862 1020 Mhz 868Mhz EU868 IN865 RU864 915 SX1276 Band1 HF 862 1020 M...

Page 32: ...ransmitter x 1 Dimension and weight Device Size Device Weight Package Size Packege Weight 10 Support Support is provided Monday to Friday from 09 00 to 18 00 GMT 8 Due to different timezones we cannot...

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