HCL:Dragino LG02
The Dragino LG02 and OLG02 are MIPS based dual-channel LoRa gateways, shipping with OpenWrt.
Technical details
- Dragino HE SoM
- Atheros AR9331 SoC
- 1x MIPS CPU @ 400 MHz
- Atheros AR9331 SoC
- Dragino LoRa G-Dual daughterboard
- 2x HopeRF RFM9x LoRa modules (SPI)
- Semtech SX127x LoRa transceiver
- 2x HopeRF RFM9x LoRa modules (SPI)
- 2x Ethernet
- 1x USB 2.0
- XBee socket
Manual installation
Beneath the daughterboard there's a connector with labeled RXD, TXD, GND pins that expose the serial console.
Note: A mips port of openSUSE is not bootstrapped yet.
U-Boot
The device ships a downstream U-Boot 1.1.4.
As of v2018.11-rc3, mainline U-Boot has some support for ar933x but no configs for Dragino boards.
Kernel
The mainline kernel does have support for ar9331, but no Device Tree for LG02 or HE. (Being prepared on dragino-next branch.)
$ make ARCH=mips CROSS_COMPILE=mips-suse-linux- ath79_defconfig
Select CONFIG_MIPS_RAW_APPENDED_DTB=y.
$ make ARCH=mips CROSS_COMPILE=mips-suse-linux- vmlinux.bin dtbs
$ cat arch/mips/boot/vmlinux.bin arch/mips/boot/dts/qca/ar9331_dragino_lg02.dtb > vmlinux_dtb.bin
$ mkimage -A mips -O linux -T kernel -C none \
-a 0xffffffff80060000 -e $(arch/mips/tools/elf-entry vmlinux) \
-d vmlinux_dtb.bin uImage
To boot from TFTP:
dr_boot> tftpboot $loadaddr uImage dr_boot> bootm $loadaddr
Unfortunately this does not yet reliably boot as of v4.20-rc1.