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LGT-92 LoRa GPS Tracker User Manual 3 / 40
1. Introduction..............................................................................................................................5
1.1 What is LGT-92 LoRa GPS Tracker ..............................................................................................5
1.2 Specifications..............................................................................................................................6
1.3 Features......................................................................................................................................7
1.4 Applications................................................................................................................................7
1.5 Hardware Changelog .................................................................................................................7
1.6 Variants ......................................................................................................................................9
2. Use LGT-92 with stock LoRaWAN firmware .............................................................................10
2.1 How it works?...........................................................................................................................10
2.2 Quick guide to connect to LoRaWAN server (OTAA) .................................................................10
2.3Uplink Payload..........................................................................................................................14
2.3.1 Payload Analyze ..............................................................................................................14
2.3.2 Add Payload format in TTN .............................................................................................16
2.4 Downlink Payload.....................................................................................................................18
2.5 LED Status.................................................................................................................................18
2.6 Button Function........................................................................................................................19
2.7 USB Port Function.....................................................................................................................19
2.8 Firmware Change Log...............................................................................................................19
3. Use AT Command....................................................................................................................20
3.1 Access AT Command.................................................................................................................20
3.2 Common AT Command Sequence.............................................................................................23
3.2.1 Multi-channel ABP mode (Use with SX1301/LG308) ......................................................23
3.2.2 Single-channel ABP mode (Use with LG01/LG02)...........................................................23
4. Upload Firmware ....................................................................................................................24
5. Developer Guide .....................................................................................................................26
5.1 Source Code..............................................................................................................................26
5.2 Compile Source Code ................................................................................................................26
5.2.1 Set up Keil compile environment....................................................................................26
5.2.2 Install STM32L0 Series Device.........................................................................................29
5.2.3 Compile Source Code......................................................................................................30
