Data Sheet

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LGT-92 LoRa GPS Tracker User Manual 2 / 29
1. Introduction .............................................................................................................................. 4
1.1 What is LGT-92 LoRa GPS Tracker .............................................................................................. 4
1.2 Specifications .............................................................................................................................. 5
1.3 Features ...................................................................................................................................... 6
1.4 Applications ................................................................................................................................ 6
2. Use LGT-92 with stock LoRaWAN firmware ............................................................................... 7
2.1 How it works? ............................................................................................................................. 7
2.2 Quick guide to connect to LoRaWAN server (OTAA) ................................................................... 7
2.3 Uplink Payload .......................................................................................................................... 10
2.3.1 Payload Analyze: ............................................................................................................. 10
2.3.2 Add Payload format in TTN: ............................................................................................ 10
2.4 Downlink Payload ..................................................................................................................... 11
2.5 Firmware Change Log............................................................................................................... 11
3. Use AT Command .................................................................................................................... 12
3.1 Access AT Command ................................................................................................................. 12
3.2 Common AT Command Sequence ............................................................................................. 14
3.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ...................................................... 14
3.2.2 Single-channel ABP mode (Use with LG01/LG02) ........................................................... 14
4. Upload Firmware .................................................................................................................... 15
5. Developer Guide ..................................................................................................................... 17
5.1 Source Code .............................................................................................................................. 17
5.2 Compile Source Code ................................................................................................................ 17
5.2.1 Set up Keil compile environment .................................................................................... 17
5.2.2 Install STM32L0 Series Device......................................................................................... 20
5.2.3 Compile Source Code ...................................................................................................... 21
6. FAQ ......................................................................................................................................... 22
6.1 Why there is 433/868/915 version? ......................................................................................... 22
6.2 What is the frequency range of LT LoRa part? ......................................................................... 23
6.3 How to change the LoRa Frequency Bands/Region? ................................................................ 24
6.4 Can I use Private LoRa protocol? .............................................................................................. 24