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Nerves Meetup EU
Paul Guyot connected Nerves and AtomVM. And showed it to us. Great presentation with lots of interesting bits to it.
Make sure you are on the list for when we announce the next speaker.
NervesConf EU at Goatmire Elixir
The Goatmire Elixir website has all the planned speakers and workshop. Check it out :)
Software updates
System updates
This release fixes a patch to turn off WiFi roaming and buggy features on Raspberry Pis. The patch was previously ineffective. With the patch, some Raspberry Pi 5s reportedly have been WiFi.
- Package updates
- rpi-distro-firmware-nonfree: fix modprobe.d location for Busybox modprobe
This is a security and bug fix release.
- Package updates
Raspberry Pi systems
This is a security and bug fix release.
Changes
- Use https for the backup site
- Use https for the backup site
Package updates
- linux: support USB touchscreens
- linux: support USB touchscreens
nerves_system_qemu_aarch64, v0.3.4
- Use ARMv8 floating point since available
- Add Nerves backup site and other missing options
nerves_system_mangopi_mq_pro, v0.15.4
nerves_system_osd32mp1, v0.24.4
- Package updates
Changes
- Turn off visible terminal cursor blinking on some displays
- linux: enable transparent huge pages to remove video driver warning
Package updates
Other updates
Drop support for Elixir 1.15.
- Changes
- Add service announcement on responder startup to improve discovery time
- Fixes
- Fix quick_scan/1 crash on FAIL-BUSY. (@gordoneliel)
- Fixes
- Fix permissions on /etc/resolv.conf so unprivileged users could read it on systems with 077 umasks. This fixes name resolution for those users.
- Changed
- Support requesting DHCP options. For example, ipv4: %{method: :dhcp, dhcp_request_options: ["wpad"]} (@gordoneliel)
- Fix Elixir 1.20 warnings
- New features
- Add optional Matcher.match_spec/1 callback to support returning an ETS match-spec to speed up PropertyTable.match/2. This moves an O(n) search in Elixir to ETS’s optimized C implementation. The default string list support uses it now.
Added
- HTTP options (including HTTP proxy) can now be passed through to Mint.HTTP.connect/4 for both the WebSocket connection (config :nerves_hub_link, socket: [http_opts: [...]]) and the firmware downloader (config :nerves_hub_link, downloader_http_opts: [...]). The options are merged on top of the existing SSL config rather than replacing it. See the configuration guide for a proxy example.
- Support resolving the network interface from Erlang’s new :socket based sockets (#418)
- NervesHubLink.UpdateManager.CachingUpdater now clears the cache directory when it sees a 404 during a partial-range download, allowing recovery from stale/invalid partial files (#411)
- The NervesHubLink.Downloader now detects when an HTTP request finishes with fewer bytes than the advertised content-length and surfaces :downloaded_content_length_mismatch so the updater can retry instead of treating the
download as complete. A warning is also logged if the downloaded length exceeds the content length (#411)
Updated
- NervesHubLink.status/0,1 now defaults to dispatching to NervesHubLink.UpdateManager (it previously defaulted to Socket, which doesn’t implement the call) (#412)
- The minimum value for the downloader’s worst-case timeout has been raised from 1 minute to 5 minutes so that small firmware/archive files aren’t aborted prematurely on slower networks (#421)
- NervesHubLink.NetworkInterface.from_socket/1 now matches sockets by shape instead of relying on exact tuple structure, and falls back gracefully (with a warning) for unknown socket types instead of raising (#410)
- When the connecting socket’s network interface can’t be determined yet, the retry now waits 60 seconds instead of 10 to avoid noisy polling (#410)
- Bumped castore to 1.0.18, jason to 1.4.5, nerves_time to 0.4.10, and dev/test deps bandit (1.11.0) and credo (1.7.18)
- New feature
- Support “group 2” udev notifications so that hot plugging input devices triggers applications using libinput to see the new device.
- Support “group 2” udev notifications so that hot plugging input devices triggers applications using libinput to see the new device.
This release makes it possible for firmware updates to request larger block cache sizes. Earlier versions fixed the cache at 8 MB which is too small for many delta firmware update use cases. The visible effect is that delta firmware updates become extremely slow (sometimes >1 hour) due to thrashing when their source window is set to values much larger than 8 MB.
New features
- Adjustable block cache specified in the fwup.conf. See block-cache-size-mb. Thanks to @kybishop
- Support dm-crypt aes-xts-plain64 encrypted
partitions
Bug fixes
- Fix AES compilation on 32-bit ARMv8 like a Raspberry Pi 3 with a 32-bit OS
- Fix compilation on PowerPC Macs. Thanks to @barracuda156
Community projects
- remove reverse?, move to motor-space (#31) by James Harton
- add bb_servo_robotis.install igniter task (#28) by James Harton
- remove reverse?, move to motor-space (#29) by James Harton
- add bb_servo_pigpio.install igniter task (#26) by James Harton
- remove reverse?, move to motor-space (#29) by James Harton
- add bb_servo_pigpio.install igniter task (#26) by James Harton
- remove reverse?, move to motor-space (#35) by James Harton
- add bb_servo_pca9685.install igniter task (#32) by James Harton
- remove reverse?, move to motor-space (#28) by James Harton
- skip bb_servo_feetech.install when controller is already present (#27) (#29) by James Harton
- add bb_servo_feetech.install igniter task (#25) by James Harton
model URDF <transmission> in the BB DSL (#110) by James Harton
add mix bb.from_urdf URDF importer (#107) by James Harton
bridge BB.Safety.arm/1/disarm/1 to user-defined commands (#106) by James Harton
merge mix bb.from_urdf output into existing modules (#109) by James Harton
add nx_eigen to the Nx backend choices in bb.add_nx_backend (#105) by James Harton
- stop publishing synthetic target JointState from BB.Motion (#104) by James Harton
- prompt for Nx backend during mix igniter.install bb (#103) by James Harton
- add test-subprojects CI workflow (#102) by James Harton
migrate from ex_cldr_units to localize (#96) by James Harton
force-disarm via topology supervisor instead of auto_disarm_on_error (#95) by James Harton
store wall-clock time and originating node on BB.Message (#37) (#94) by James Harton
- cover tuple argument types in typespec and :map example (#93) by James Harton
identify the publishing robot in pubsub deliveries (#91) (#92) by James Harton
coerce command goal values to declared argument types (#88) by James Harton
- BB.Igniter helpers for writing into the topology section (#87) by James Harton
- add BB.Igniter helpers for add-on installers (#86) by James Harton
docs: update README example to match Igniter output (#73) by James Harton
docs: align tutorial with Igniter-generated code (#73) by James Harton
docs: use limits instead of limit in first robot tutorial (#74) by James Harton
docs: clarify Igniter quick start instructions (#72) by James Harton
OpenLoopPositionEstimator crash on set_position/3 in kinematic simulation (#59) by James Harton
- Trapezoidal motion profile and accurate position tracking in BB.Sim.Actuator (#85) by James Harton
- Add basic igniter installer by James Harton
- add bb_pid_controller.install igniter task (#20) by James Harton
render :atom-typed argument values with their leading colon (#45) by James Harton
preserve command form input values after execute (#44) by James Harton
- display event-stream timestamps from BB.Message.wall_time (#48) by James Harton
- phoenix bootstrap + endpoint plug injection in bb_liveview.install (#43) by James Harton
- add bb_liveview.install igniter task (#42) by James Harton
- display event-stream timestamps from BB.Message.wall_time (#39) by James Harton
- respect joint limits during DLS iteration (#24) 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
