Jetson TX2 Wifi Hotspot

Product support
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1

I’m attempting to setup a wifi hotspot on a Jetson TX2. Following the instructions I was able to add a resin-hotspot file in /system-connections/. However, for the TX2 also needs the Broadcomm op_mode set to 2 for it to work as per their wiki.

The hotspot works if I run these commands after boot:

nmcli radio wifi off
echo 2 > /sys/module/bcmdhd/parameters/op_mode
nmcli radio wifi on
nmcli connection up resin-hotspot

I would rather like to set the op_mode in /etc/modprobe.d/bcmdhd.conf so that I don’t have to manually set this up every time.

I tried preparing a fresh SD-card, adding that file to the resin-rootA partition and then provisioning the Jetson. The provisioning seems to go okay and the board shows up in the dashboard. However, upon inspecting the filesystem the bcmdhd.conf file has not shown up on the device.

Any ideas on how to properly add a file to the read-only file-system or is there something else that I’m missing.

Thanks!

1 Like
4

Hey @jemoster I believe this should be added to the resin-boot partition. Note that this is not officially supported though, as any changes will be lost on a host OS update (and may cause other instabilities - although adding a network manager file shouldn’t cause this).

5

Following your suggestion, where in resin-boot would I need to put the bcmdhd.conf for it to end up in the correct place? Or is the feature to support adding the bcmdhd.conf file something that would be needed to be added as a feature of resin-boot?

6

Hi,
I think it would be better if you run this from your container. You can interact with NM from within the user container so you can turn the radio off, set op-mode to 2 and then restarwifi and bring your connection up.
Some info on interacting over dbus can be found here: https://docs.resin.io/reference/OS/network/2.x/#changing-the-network-at-runtime

7

One example to use nmcli from the container would be here: https://github.com/resin-io-playground/nmcli-no-network-manager