LGT-92: Difference between revisions
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{{Project | {{Project | ||
|Name=LGT-92 | |Name=LGT-92 | ||
|Picture= | |Picture=Lgt92.jpg | ||
|Omschrijving=Improving LGT- | |Omschrijving=Improving LGT-92 LoRaWAN tracker software | ||
|Status=Initializing | |Status=Initializing | ||
|Contact=bertrik | |Contact=bertrik | ||
| Line 12: | Line 12: | ||
The plan is to investigate if the firmware can be improved, e.g.: | The plan is to investigate if the firmware can be improved, e.g.: | ||
* fix minor existing bugs | * fix minor existing bugs | ||
** see the Issues page | ** see the [https://github.com/dragino/LGT-92_-LoRa_GPS_Tracker/issues Issues page] on github | ||
* add Cayenne encoding | * add Cayenne encoding | ||
* collect information on how to interface with it (over the "USB" port) | * collect information on how to interface with it (over the "USB" port) | ||
| Line 21: | Line 21: | ||
* STM32L151 microcontroller, could also be STM32L072 I can't get this really clear | * STM32L151 microcontroller, could also be STM32L072 I can't get this really clear | ||
* GPS | * GPS | ||
* accelerometer | * accelerometer, MPU9250? | ||
* button, 3 LEDs (R, G, B) | * button, 3 LEDs (R, G, B) | ||
* 1000 mAh battery + charging circuit | * 1000 mAh battery + charging circuit | ||
Information provided by Dragino: https://github.com/dragino/Lora/tree/master/LGT-92 | Information provided by Dragino: https://github.com/dragino/Lora/tree/master/LGT-92 | ||
Manual: https://www.dragino.com/downloads/downloads/LGT_92/ | |||
== Software == | == Software == | ||
* Dragino binary firmware downloads: https://www.dragino.com/downloads/downloads/LGT_92/firmware/ | |||
* Dragina source code: https://github.com/dragino/LGT-92_-LoRa_GPS_Tracker | |||
* Decoder: https://www.dragino.com/downloads/index.php?dir=LGT_92/Decoder/ | |||
It's a bit peculiar that there are binary versions out there that have no correspondence to the source archive. | |||
Every commit in the official source archive consists of a huge number of changes, often includes also binary/intermediate files. | |||
My fork of the Dragino firmware: https://github.com/bertrik/LGT-92_-LoRa_GPS_Tracker | My fork of the Dragino firmware: https://github.com/bertrik/LGT-92_-LoRa_GPS_Tracker | ||
| Line 33: | Line 42: | ||
=== Flashing === | === Flashing === | ||
When | When holding the reset pin (e.g. push a dupont-pin in the hole next to the USB connector), you can communicate over SWCLK/SWDIO debug pins. | ||
ST-Link pin connections (from: https://github.com/dragino/LGT-92_-LoRa_GPS_Tracker/issues/10): | ST-Link pin connections (from: https://github.com/dragino/LGT-92_-LoRa_GPS_Tracker/issues/10): | ||
ST-LINK v2 5.0v <--> Dupont red pin | ST-LINK v2 5.0v <--> Dupont red pin | ||
ST-LINK v2 SWDIO <--> Dupont white pin | |||
ST-LINK v2 SWCLK <--> Dupont green pin | |||
ST-LINK v2 GND <--> Dupont black pin | ST-LINK v2 GND <--> Dupont black pin | ||
Official firmware binaries are available [https://www.dragino.com/downloads/downloads/LGT_92/firmware/ here] | |||
For example: | For example: | ||
openocd - | openocd -s /usr/share/openocd/scripts -f interface/stlink.cfg -f target/stm32l0.cfg | ||
To program a HEX file: | |||
openocd -s /usr/share/openocd/scripts -f interface/stlink.cfg -f target/stm32l0.cfg -c init -c "program LGT92-EU868-v1.6.2.hex verify reset exit" | |||
This takes only a few seconds. | |||
=== TTN mapper configuration === | === TTN mapper configuration === | ||
Connect it at 9600 baud through a USB-UART converter, pins GND, RX, TX. Switch the LGT-92 on. | |||
USB serial TXD <--> Dupont white pin | |||
USB serial RXD <--> Dupont green pin | |||
USB serial GND <--> Dupont black pin | |||
To reset settings after a firmware update | |||
AT+FDR | |||
Run these commands to set it up with ABP keys, ADR off, uplink at SF7 every 15 seconds: | Run these commands to set it up with ABP keys, ADR off, uplink at SF7 every 15 seconds: | ||
AT+NJM=0 | |||
AT+ADR=0 | AT+ADR=0 | ||
AT+CFM=0 | AT+CFM=0 | ||
AT+DR=5 | AT+DR=5 | ||
| Line 59: | Line 83: | ||
AT+PORT=1 | AT+PORT=1 | ||
AT+FTIME=0 | AT+FTIME=0 | ||
AT+PDOP=10.0 | |||
AT+SGM=0 | |||
The AT+SGM=0 line allows the altitude and HDOP to be sent. | |||
Latest revision as of 19:29, 10 August 2021
| Project LGT-92 | |
|---|---|
| |
| Improving LGT-92 LoRaWAN tracker software | |
| Status | Initializing |
| Contact | bertrik |
| Last Update | 2021-08-10 |
What
This page is about the Dragino LGT-92, a GPS-enabled LoRaWAN tracker node.
The plan is to investigate if the firmware can be improved, e.g.:
- fix minor existing bugs
- see the Issues page on github
- add Cayenne encoding
- collect information on how to interface with it (over the "USB" port)
- perhaps write a replacement firmware, that can be easily compiled with platformio
Hardware
As far as I understand:
- STM32L151 microcontroller, could also be STM32L072 I can't get this really clear
- GPS
- accelerometer, MPU9250?
- button, 3 LEDs (R, G, B)
- 1000 mAh battery + charging circuit
Information provided by Dragino: https://github.com/dragino/Lora/tree/master/LGT-92
Manual: https://www.dragino.com/downloads/downloads/LGT_92/
Software
- Dragino binary firmware downloads: https://www.dragino.com/downloads/downloads/LGT_92/firmware/
- Dragina source code: https://github.com/dragino/LGT-92_-LoRa_GPS_Tracker
- Decoder: https://www.dragino.com/downloads/index.php?dir=LGT_92/Decoder/
It's a bit peculiar that there are binary versions out there that have no correspondence to the source archive. Every commit in the official source archive consists of a huge number of changes, often includes also binary/intermediate files.
My fork of the Dragino firmware: https://github.com/bertrik/LGT-92_-LoRa_GPS_Tracker
Work in progress for an Arduino firmware: https://github.com/bertrik/lgt92
Flashing
When holding the reset pin (e.g. push a dupont-pin in the hole next to the USB connector), you can communicate over SWCLK/SWDIO debug pins.
ST-Link pin connections (from: https://github.com/dragino/LGT-92_-LoRa_GPS_Tracker/issues/10):
ST-LINK v2 5.0v <--> Dupont red pin ST-LINK v2 SWDIO <--> Dupont white pin ST-LINK v2 SWCLK <--> Dupont green pin ST-LINK v2 GND <--> Dupont black pin
Official firmware binaries are available here
For example:
openocd -s /usr/share/openocd/scripts -f interface/stlink.cfg -f target/stm32l0.cfg
To program a HEX file:
openocd -s /usr/share/openocd/scripts -f interface/stlink.cfg -f target/stm32l0.cfg -c init -c "program LGT92-EU868-v1.6.2.hex verify reset exit"
This takes only a few seconds.
TTN mapper configuration
Connect it at 9600 baud through a USB-UART converter, pins GND, RX, TX. Switch the LGT-92 on.
USB serial TXD <--> Dupont white pin USB serial RXD <--> Dupont green pin USB serial GND <--> Dupont black pin
To reset settings after a firmware update
AT+FDR
Run these commands to set it up with ABP keys, ADR off, uplink at SF7 every 15 seconds:
AT+NJM=0 AT+ADR=0 AT+CFM=0 AT+DR=5 AT+LON=1 AT+MD=0 AT+DADDR=26 01 1A 30 AT+NWKSKEY=FB 09 6B 85 86 AF 47 12 E8 AE 67 CB 7F A9 CB 51 AT+APPSKEY=CB 9B 8F F5 E6 2C 8E 87 9E 0B 6B 1F 4B 69 14 FA AT+TDC=15000 AT+NMEA886=2 AT+PORT=1 AT+FTIME=0 AT+PDOP=10.0 AT+SGM=0
The AT+SGM=0 line allows the altitude and HDOP to be sent.