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NervesConf EU Call for Talks
The first day of Goatmire will be the NervesConf EU day this year as well. And the Call for Talks is open .
I already see that we've received some absolute bangers. And if you have workshop sessions or project hack sessions you want to host those are also welcome. Most of the Nerves core team is confirmed to attend so it is also a great opportunity to get some face to face time with folks that really know this stuff.
Reminder about the Nerves Discord
The Nerves Discord is the official place for discussion, community support and more for Nerves. It also hosts the Nerves Meetup EU activities. We have BEAM Bots as a guest channel. Lots of good stuff happening in there.
Nerves Meetup EU
We finally got the inside scoop on the official Nerves Starter Kit. This is a lovely hardware device Gus is working on that will give a powerful starting point for learning the ins and outs of Nerves and compared to something like a Raspberry Pi will come with both interesting inputs and outputs so as to not require HATs and extensions to get started.
There are big plans and Gus shares a lot of the current progress (significant!) and the near-term roadmap (ambitious). Attending live is always best but the video is below.
We've already seen significant contributions from people who attended and grabbed the existing repo for the Goatmire name badge , which is the foundation for the starter kit. And just using the web-based simulator of the badge implemented several improvements. Like a calendar (shoutout to Pepe).
Very exciting presentation. And you should have seen what we got shown in the breakout rooms after. Wow. But I suppose that's for attendees only.
Nerves at ElixirConf EU?
If you are going to ElixirConf EU in Malaga. Do try and be there with some margin as we are planning to do something on the day before the conf starts (overlaps with trainings unfortunately). More information to come.
I was also sent some write-ups by the new unfamiliar Nerves speaker Marta Habdas. Some neat Arduino-oriented projects there.
These are the known-Nerves talks for ElixirConf EU:
Software updates
Nerves Project Official
This is a big one, partially because the newsletter got pushed out a bit but also due to big system updates for the RPi systems.
We'll start with the non-major version system changes:
This is a bug and security fix release. See the Erlang and Buildroot release notes for details.
Changes
- Log firmware nicknames if available
- Log firmware nicknames if available
Package updates
General updates
Package updates
Raspberry Pi-specific updates
- Fix camera support by enabling the unicam-legacy Linux device driver
- Enable USB gadget mode on CM5/CM5IO
Non-Raspberry Pi updates (I believe)
Enabled multipath TCP support in the Linux kernel.
System versions
nerves_system_rpi0, v1.33.1
nerves_system_rpi0_2, v1.33.1
nerves_system_rpi, v1.33.1
nerves_system_rpi2, v1.33.1
nerves_system_rpi3, v1.33.1
nerves_system_rpi3a, v1.33.1
nerves_system_rpi4, v1.33.1
kiosk_system_rpi4, v0.6.2
kiosk_system_rpi5, v0.6.2
nerves_system_mangopi_mq_pro, v0.15.1
nerves_system_grisp2, v0.17.1
nerves_system_osd32mp1, v0.24.1
nerves_system_vultr, v0.30.1
nerves_system_x86_64, v1.33.1
nerves_system_bbb, v2.29.1
nerves_system_qemu_aarch64, v0.3.1
Major Raspberry Pi update, 2.x-series
Release notes:
This is a major update of the system that changes the MicroSD/eMMC layout in order to support automatic rollback of non-working firmware updates.
IMPORTANT This is a one way upgrade. Going back to the old partitioning requires manually reflashing of the RPi’s storage.
Previous releases assumed that firmware updates worked. This one requires that firmware images mark themselves as good using Nerves.Runtime.validate_firmware/0. See Nerves.Runtime for more information on this. Firmware not marked as good reverts back to the previous version.
Changes
- Fix camera support by enabling the unicam-legacy Linux device driver
- Enabled multipath TCP support in the Linux kernel
- Deleted all use of nerves_fw_active since it was sometimes incorrect and caused confusion
Package updates
Systems
nerves_system_rpi0, v2.0.0
- Add gpio-poweroff overlay to support Soleil
- Add gpio-poweroff overlay to support Soleil
nerves_system_rpi, v2.0.0
nerves_system_rpi2, v2.0.0
nerves_system_rpi3, v2.0.0
nerves_system_rpi3a, v2.0.0
nerves_system_rpi4, v2.0.0
nerves_system_rpi5, v2.0.0
kiosk_system_rpi4, v2.0.0
kiosk_system_rpi5, v2.0.0
This updates the Raspberry Pi Nerves systems to their 2.0 versions. If upgrading an existing device, the MicroSD/eMMC layout will be upgraded to support the Raspberry Pi Tryboot feature. It’s not possible to downgrade to the old layout without manually reflashing.
All other supported devices just have patch updates for the new Erlang and Buildroot versions.
- Updates
- Update Nerves systems to nerves_system_br v1.33.1 (Erlang/OTP 28.3.1, Buildroot 2025.11.1)
Other updates
- Fixes
- Handle spaces in instance names on MacOS and Avahi
- Always return maps with all fields on MacOS so that it behaves the same as the generic and Avahi resolvers
New features
- Add :addresses field to return devices that contain all of the IPv4 addresses for a device. This adds support for multi-homed devices. Consequently, the :ip field is now redundant and is marked as deprecated.
- Add :addresses field to return devices that contain all of the IPv4 addresses for a device. This adds support for multi-homed devices. Consequently, the :ip field is now redundant and is marked as deprecated.
Improvements
- Replace all System.shell calls with System.cmd
- Small documentation updates per feedback
- Changed
- Reverted change which changed the :remote_iex_timeout unit value in config to be specified in seconds again to retain backwards compatibility. If you didn't specify this config, the change had no effect.
- Added
- Support restoring the private key when using TPM for authentication.
- Support separate SSL config for downloader.
- Allow additional fwup arguments to be passed from configuration. Allows using --unsafe for example.
This release shouldn’t affect your setup unless you are doing fairly unusual connection config. A bunch of dependencies were also updated of course.
Added
- Add a local shell extension for establishing an interactive shell separate from the iex console.
- Add logging that can help indicate clock issues for shared secret connections.
- Execute support scripts under a Task.Supervisor.
- Foundational support for multiple Sockets.
Updated
- Only set :server_name_indication if set in the config.
- Follow redirects returned during connection. This allows setting up custom domains to be able to switch NervesHub providers.
- Changes
- Fix nerves.loadpaths crash when using ElixirLS (@bjyoungblood)
- Minor improvements to nerves.discover including showing multiple IP addresses for multi-homed devices and firmware nicknames
- Changes
- Removed unused application callbacks and clarified how the library is used
- Changes
- Partially revert Elixir 1.20 warning fix in v0.13.11 that caused a different issue. This fixes a missing require Logger on non-host targets.
This change adds a simple firmware validator for Nerves devices that validate their firmware the first time it’s run. It’s optional and the default is to not use it. This is useful for all Nerves systems that require validation on boot and is intended to ease the change on the Raspberry Pi “2.0” Nerves systems.
The simple firmware validator only checks that all OTP applications have started up successfully. If you already have a firmware validator, you can just ignore this.
If you don’t know if you need a firmware validator, you likely don’t since your device boots with the assumption that the firmware will work. If you need to run fw_validate or Nerves.Runtime.validate_firmware/0 every time you load new firmware, then you’ll want some code to do it automatically and this is an option.
See the main README.md and Nerves.Runtime.StartupGuard for integration with your project.
- Changes
- Add Nerves.Runtime.StartupGuard
- Fix new Elixir 1.20 warnings
- Improvements
- Print firmware nickname if available when running mix upload
This release completely removes support for the SCP protocol. This shouldn’t affect use of the scp commandline program since it was updated to use the SFTP protocol in 2022. See https://www.openssh.org/txt/release-9.0 .
The code is being removed to avoid needing to maintain or audit it for security issues.
- Fixes
- Fix trivial Elixir warnings when compiled with Elixir 1.19 and 1.20
Community projects
ExNVR - A network video recorder, on Nerves
What’s Changed
Nerves
- Bug fixes on the remote configurer by @gBillal in https://github.com/evercam/ex_nvr/pull/839
Nerves Community
Starting from this version, we have pre-built nerves images for rpi4 and rpi5 :tada:
Full Changelog : https://github.com/evercam/ex_nvr/compare/v0.26.0…v0.26.1
What’s Changed
Core/UI
- upgrade deps and refactor mp4 concatenater by @gBillal in https://github.com/evercam/ex_nvr/pull/831
- Upgrade elixir, otp and nerves by @gBillal in https://github.com/evercam/ex_nvr/pull/834
- Use hlx lib for hls by @gBillal in https://github.com/evercam/ex_nvr/pull/835
- Parse victron hex protocol by @gBillal in https://github.com/evercam/ex_nvr/pull/832
Nerves
- Add more api for teltonika rut configuration by @gBillal in https://github.com/evercam/ex_nvr/pull/822
- Add community nerves image by @gBillal in https://github.com/evercam/ex_nvr/pull/833
- Update Evercam remote configurer by @gBillal in https://github.com/evercam/ex_nvr/pull/813
Full Changelog : https://github.com/evercam/ex_nvr/compare/v0.25.1…v0.26.0
This is a major Buildroot and Linux update. It should be seamless for most 1.32.0 users.
Updated dependencies
This is a major Buildroot and Linux update. It should be seamless for most 0.7.0 users.
Updated dependencies
AtomVM - Erlang and Elixir for the smaller devices
This release is primarily a bug fix for the new --lib option, which was not added to the escript. This issue has been fixed and should now work for both the escript and the underlying APIs. We have also expanded test coverage, and added documentation for the new --lib option. See CHANGELOG.md for a complete list of changes.
GRiSP
Added
- Add allow_expired_certs option by @sylane in https://github.com/grisp/grisp_keychain/pull/2
New Contributors
- @sylane made their first contribution in https://github.com/grisp/grisp_keychain/pull/2
Full Changelog : https://github.com/grisp/grisp_keychain/compare/1.0.0…1.1.0
Added
- Support for OTP 28
Full Changelog : https://github.com/grisp/grisp_updater_grisp2/compare/0.2.1…1.0.0
Added
- Support for OTP 28
Full Changelog : https://github.com/grisp/grisp_cryptoauth/compare/2.5.0…2.6.0
Added
- Add reserved partition role support
- Add support for extra manifest metadata
- Add optional system_update_init/2 cleanup callback for releasing resources
- Add optional system callback to receive firmware info during updates
Changed
- Make system_get_global_target/1 optional in the system behaviour
Fixed
- Reset update status correctly when canceling an update
Full Changelog : https://github.com/grisp/grisp_updater/compare/2.1.1…2.2.0
BEAM Bots - Robotics on the BEAM with Elixir
Bug Fixes:
- thread remaining buffer through sync_read responses (#9) by James Harton
Features:
- migrate to structured error system (#8) by James Harton
Features:
- migrate to structured error system (#8) by James Harton
Bug Fixes:
prevent stale-goal torque impulse when arming (#10) by James Harton
prevent stale-goal torque impulse when arming by James Harton
Bug Fixes:
update for bb 0.15.0 compatibility by James Harton
update TestRobot disarm command for bb 0.15.0 by James Harton
Bug Fixes:
- docs: correct BB.Message.Sensor.IMU references to BB.Message.Sensor.Imu by James Harton
You can buy an official Nerves shirt from oswag . Fair trade, organic and high-quality. Family-scale business.
Got questions?
Trouble-shooting is best done on the Nerves Forum over at Elixir's Forum. But if you have big-picture questions you would like to ask around Nerves, feel free to send them in and we might just have ourselves a column here.
Participating in the community
The Nerves community is found wherever Elixirists gather. But our primary focus is the Nerves Discord . You are very welcome to join us there.
Also fine to throw questions into the Elixir Forum's Nerves section .
How you can help Nerves
Contribute in the way that works for you:
- Send corrections or improvements for documentation wherever it fails to help you.
- Write about Nerves, give talks about Nerves. Make videos about Nerves. It is all good.
- Write or port a new hardware library and include it in the Elixir Circuits collection .
- Get in touch about taking over maintenance duties for some libraries, we might be able to provide you hardware.
- Apply for an EEF stipend on something Nerves-related and build it. We can help if you have questions about this.
Finally, if you have questions about the newsletter or want to suggest something you can simply respond to this email.
- Lars
