WIP / POC for using the ESP32C3 and ESP32 wifi drivers in bare-metal Rust

esp-rs

Last update: Jan 2, 2023

Related tags

Command-line esp-wifi

Overview

Wifi on ESP32C3 and ESP32 (on bare-metal Rust)

About

This is experimental and work-in-progress! You are welcome to experiment with it and contribute but probably shouldn't use this for something real yet.

This uses the WiFi driver found in https://github.com/espressif/esp-wireless-drivers-3rdparty

Version used

esp-wireless-drivers-3rdparty-055f1ef49d0cb72c24bd492fbbdd37497a90bdae 45701c0

https://github.com/espressif/esp-wireless-drivers-3rdparty/archive/45701c0.zip

Example

dhcp
- set SSID and PASSWORD env variable
- gets an ip address via DHCP
- performs an HTTP get request to some "random" server

Command	Chip
`cargo "+nightly" run --example dhcp_esp32c3 --release --target riscv32i-unknown-none-elf --features "esp32c3,embedded-svc"`	ESP32C3
`cargo "+esp" run --example dhcp_esp32 --release --target xtensa-esp32-none-elf --features "esp32,embedded-svc"`	ESP32

Additional you can specify these features

Feature	Meaning
wifi_logs	logs the WiFi logs from the driver at log level info
dump_packets	dumps some packet info at log level info
utils	Provide utilities to use `embedded-nal`, this is a default feature
allocator	Provides a global allocator which just uses the internal `malloc` - it doesn't honor special alignments
embedded-svc	Provides a (very limited) implementation of the `embedded-svc` WiFi trait, includes `utils` and `allocator` feature

In general you should use the release profile since otherwise the performance is quite bad.

What works?

scanning for WiFi access points
connect to WiFi access point

Notes on ESP32C3 support

uses SYSTIMER as the main timer
doesn't work in direct-boot mode
only works with target riscv32i-unknown-none-elf

Notes on ESP32 support

This is even more experimental than support for ESP32C3.

The WiFi logs only print the format string - not the actual values.
Also there might be some packet loss and a bit worse performance than on ESP32C3 currently.
The code runs on a single core and is currently not multi-core safe!

On ESP32 currently TIMG1 is used as the main timer so you can't use it for anything else.

Directory Structure

src/timer-espXXX.rs: systimer code used for timing and task switching
src/preemt/: a bare minimum RISCV and Xtensa round-robin task scheduler
src/log/: code used for logging
src/binary/: generated bindings to the WiFi driver (per chip)
src/compat/: code needed to emulate enough of an (RT)OS to use the driver
- malloc.rs: a homegrown allocator - this is NOT used on the Rust side (the Rust side of this is currently no-alloc)
- common.rs: basics like semaphores and recursive mutexes
- timer_compat.rs: code to emulate timer related functionality
headers: headers found in the WiFi driver archive (bindings are generated from these)
libs/espXXX: static libraries found in the WiFi driver archive (these get linked into the binary)
mkbindings.bat: generate the bindings / just calls bindgen
ld/espXXX/rom_functions.x: the WiFi driver uses some of these so it needs to get linked
ld/esp32/wifi-link.x: the main linker script for ESP32 - needs to get cleaned up and ideally the changes move to ESP-HAL
examples/dhcp_espXXX/main.rs: example using the code (per chip)

Missing / To be done

lots of refactoring
Bluetooth (and coex)
esp-now
powersafe support

License

Licensed under either of:

Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Comments

Update embedded svc

This is based on the #82 branch, so until that's merged this is blocked. I only implemented the Wifi trait on the Wifi struct, but where should I implement the Interface trait. This contains the actual IP info, should I directly implement it into Wifi or should we change places into Network, what should we do with the poll_dhcp function then in Wifi

Closes #83

opened by ImUrX 22
Remove the embedded-nal / smoltcp-nal dependencies from `wifi_interface.rs` and esp-wifi
While smoltcp itself has no alternative in the embedded world, I'm less than convinced that embedded-nal is the no-brainer for embedded networking: it still relies on the nb "async" approach, which is essentially just busylooping with constant polling of the networking layer. While this might have been the norm a few years ago, it is no more:

embedded-hal is moving away from nb in favor of the async-based traits

smoltcp itself has an async support and an async feature since quite some time, so it is very easy to bind it to an async executor of your choice, if you prefer so

In my opinion:

We need to remove from esp-wifi all dependencies / reliance on embedded-nal / smoltcp-nal. This stuff is anyway a thin wrapper on top of the heavy lifting done by smoltcp itself

The Wifi struct can instead take directly the smoltcp IP interface, i.e. the "ethernet" var

This way, the create_network_stack utility will construct and return directly the smoltcp interface instead of the embedded-nal wrapper. Perhaps, we should rename the utility to create_network_interface or suchlike

The network_stack method of the Wifi struct should instead directly return the native smoltcp interface

With that little surgery, users would be free to either use smoltcp-nal on top of the smoltcp interface returned by Wifi, or the smoltcp built-in async facilities, with an async executor of their choice.
opened by ivmarkov 17
DHCP example fails to get an IP address on ESP32-C3

Hi, I tried running the DHCP example (commit a0a6b5fbcf7) on my esp32-c3-mini and it appears as though the code is racy. It fails to get an ip address, unless I do some random permutation of dump_packets, wifi_logs, and manually putting in for i in 1000 {} style loops.

I'm working with @ImUrX and he also cannot get the example working on his PCB, although his is a lolin_c3_mini v1.0.0 (which may have hardware issues with wifi, so could be a red herring).

If I use --release it works consistently.

opened by TheButlah 16
dhcp_esp32c3 example fails to get an IP address when compiled in Release

When the dhcp_esp32c3 is ran in release it hangs at Start busy loop on main and never continues. This same dhcp_esp32c3 example gets an IP address from DHCP as expected for me when it's ran in debug.

Related to #6?
bug

opened by D1plo1d 16
Getting linking issues when using esp-wifi

I was adding esp32 support to my esp32c3 project and for some reason I'm getting linking issues when activating the esp-wifi feature I have. I honestly dont understand much so maybe I can get some help in here: This is the linking error and this is the project

opened by ImUrX 10
Fix ESP32-C3 development mode
This should address the issue reported in #88

Additionally

updated embedded-io to 0.3.1

improve mkbindings.bat

don't report StaDisconnected as connected anymore
opened by bjoernQ 8
Update drivers
This closes #52

update the drivers for ESP32 and ESP32-C3

improve the examples

While this PR seems to be huge, it isn't. Most of the changes are in C headers and generated bindings.
opened by bjoernQ 8

Swap out the current allocator for `esp-alloc`

~~This builds on #39, and as such cannot be merged until that PR is.~~

This works on the ESP32-C3 without issue, however building for the ESP32 results in a linker error:

error: linking with `xtensa-esp32-elf-gcc` failed: exit status: 1
  |
  = note: "xtensa-esp32-elf-gcc" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.0.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.1.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.10.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.11.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.12.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.13.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.14.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.15.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.2.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.3.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.4.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.5.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.6.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.7.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.8.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.dhcp_esp32.cb737b37-cgu.9.rcgu.o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b.iwnybrojg66ry1h.rcgu.o" "-Wl,--as-needed" "-L" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps" "-L" "/Users/jesse/Work/esp-wifi/target/release/deps" "-L" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/build/esp-wifi-4cf6e16cf3490c76/out" "-L" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/build/xtensa-lx-4a114887ea50d4c3/out" "-L" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/build/xtensa-lx-rt-ef310f0681dc9281/out" "-L" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/build/esp32-hal-981d4cfdf0ff5b85/out" "-L" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/build/esp32-5c76282a31736b6e/out" "-L" "/Users/jesse/.rustup/toolchains/esp/lib/rustlib/xtensa-esp32-none-elf/lib" "-Wl,-Bstatic" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libesp_wifi-fbe4abcbcf215b69.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libesp_alloc-c060953ba804a78a.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/liblinked_list_allocator-4ef263736359aad4.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libspinning_top-21c5f0355a2085be.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libsmoltcp-0bba41ed2db86d27.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libbitflags-2a9f9e706eec8442.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libmanaged-0f6b57e1625fcb7e.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libatomic_polyfill-bb467dab1e9b276f.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libcritical_section-36eac500ce94d399.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/liblog-ca5de0a110cc2fb9.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libesp_println-f12f43cb0797d101.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libesp32_hal-49cf89aa123eccd0.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libesp_hal_common-6d4f0442eb78b1f6.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libcritical_section-279312af61635534.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libcfg_if-778cc715c08c90dd.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libsmart_leds_trait-bf02318b2b258ba1.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/librgb-a61c6a77a5526a3b.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libbytemuck-95ec8e92ea41d238.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libxtensa_lx_rt-8f3e4a9df978c770.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libr0-27ef6ffbef74e8fa.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libfugit-f3d074f1f67858f7.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libgcd-aaa05ddbeaa2620a.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libesp32-7a9f161a7164ba4b.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libxtensa_lx-92fa6630c50fa721.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libspin-dc50f05a7a63865a.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/liblock_api-1b5268dfcd1bf4d3.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libscopeguard-4fd0099d2fa4a15e.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libmutex_trait-f357cef0832b190b.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libbare_metal-8c92058f831287bd.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libvcell-96a925c0101a1afe.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libembedded_hal-5849c01705429e94.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libvoid-e716c48010b93998.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libnb-7384b7c50b3fc834.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libnb-f671a0f55f07f463.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libembedded_svc-0c32aacbbd83c2a9.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libheapless-99bb4813e7ca9dec.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libhash32-23fe63db3bca42b9.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libbyteorder-3eec2d3701626149.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libserde-506dfce2d6d3eeca.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libno_std_net-c8aed46919778570.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libenumset-efb2872dc7c531a5.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libembedded_io-39243cccb0fb937d.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/liballoc-cab08ec8de2630a1.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/librustc_std_workspace_core-2bb66c92ab28eb50.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libcore-822e4434f606ddd3.rlib" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/deps/libcompiler_builtins-23011b67784957ef.rlib" "-Wl,-Bdynamic" "-lbtdm_app" "-lcoexist" "-lcore" "-lespnow" "-lmesh" "-lnet80211" "-lphy" "-lpp" "-lrtc" "-lsmartconfig" "-lwapi" "-lwpa_supplicant" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/Users/jesse/.rustup/toolchains/esp/lib/rustlib/xtensa-esp32-none-elf/lib" "-o" "/Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b" "-Wl,--gc-sections" "-no-pie" "-Wl,-O1" "-nodefaultlibs" "-Tlinkall.x" "-Tesp32_rom_functions.x"
  = note: /Users/jesse/.espressif/tools/xtensa-esp32-elf-gcc/8_4_0-esp-2021r2-patch3-x86_64-apple-darwin/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: /Users/jesse/Work/esp-wifi/target/xtensa-esp32-none-elf/release/examples/dhcp_esp32-db6b59f4ab95624b section `.bss' will not fit in region `dram_seg'
          /Users/jesse/.espressif/tools/xtensa-esp32-elf-gcc/8_4_0-esp-2021r2-patch3-x86_64-apple-darwin/bin/../lib/gcc/xtensa-esp32-elf/8.4.0/../../../../xtensa-esp32-elf/bin/ld: region `dram_seg' overflowed by 35876 bytes
          collect2: error: ld returned 1 exit status

Not sure why dram_seg is overflowing. Reducing the heap size allows it to build, but results in runtime errors instead.

opened by jessebraham 8

Can't connect to any AP?

I've been playing around trying to get this work. Scanning works perfectly, I can see a table of networks near me, but If I try to connect to any (I've tried 4 in total, on two different esp32c3's), the WiFi state never transitions to STA_CONNECTED. Judging by the logs below is transitions to STA_STOP.

wifi_connect returned 0
D (405) wifi:scan end: arg=0x0, status=0, ss_state=0x03
V (405) wifi:hint scan, stop scan
V (405) wifi:back home chan=<1,0>, current chan=<10,0>
V (408) wifi:ht20 freq=2412, chan=1
D (412) wifi:filter: set rx policy=4
D (412) wifi:first chan=1
V (416) wifi:scan_done: arg=0x0, status=0, cur_time=647416, scan_id=128, scan state=00
V (423) wifi:call scan_done cb, arg=0x0
D (427) wifi:handoff_cb: status=0
D (431) wifi:clear rc list
D (431) wifi:clear blacklist
D (435) wifi:send disconnect event
D (438) wifi:connect status 1 -> 3
D (442) wifi:disable connect timer
D (443) wifi:clear scan ap list

Things I've tried

Different AP's
Different boards
Changing the country code in wifi_init

I've sniffed the connect packed with my laptop in promiscuous mode and the packet seems normal.

opened by MabezDev 6

Feature Request: UDP Sockets

I'm interested in using a esp32c3 to received UDP packets. I've been playing with the DHCP example and it looks like it is working quite well (kudos!) and I'm excited to use this more - is there any chance that UDP support is coming soon?

opened by D1plo1d 5

Code fails to compile on latest `main`

Version: 69956d42d2ddf00dd7021e429ed815f982e35319 (latest main)

Feature flags: "esp32c3", "wifi"

I noticed that the crate patches esp32c3-hal, but that I am using esp32c3-hal = 0.2. Perhaps that could be why?

Error:

error[E0433]: failed to resolve: could not find `wifi_interface` in the crate root
   --> /Users/ryan.butler/.cargo/git/checkouts/esp-wifi-836f3b2af57fa847/69956d4/src/wifi/utils.rs:103:31
    |
103 |     interface: RefCell<crate::wifi_interface::Wifi<'a>>,
    |                               ^^^^^^^^^^^^^^ could not find `wifi_interface` in the crate root

error[E0433]: failed to resolve: could not find `wifi_interface` in the crate root
   --> /Users/ryan.butler/.cargo/git/checkouts/esp-wifi-836f3b2af57fa847/69956d4/src/wifi/utils.rs:110:27
    |
110 |         interface: crate::wifi_interface::Wifi<'a>,
    |                           ^^^^^^^^^^^^^^ could not find `wifi_interface` in the crate root

error[E0433]: failed to resolve: could not find `wifi_interface` in the crate root
   --> /Users/ryan.butler/.cargo/git/checkouts/esp-wifi-836f3b2af57fa847/69956d4/src/wifi/utils.rs:122:31
    |
122 |         F: FnOnce(&mut crate::wifi_interface::Wifi<'a>) -> R,
    |                               ^^^^^^^^^^^^^^ could not find `wifi_interface` in the crate root

error[E0392]: parameter `'a` is never used
   --> /Users/ryan.butler/.cargo/git/checkouts/esp-wifi-836f3b2af57fa847/69956d4/src/wifi/utils.rs:102:20
    |
102 | pub struct Network<'a> {
    |                    ^^ unused parameter
    |
    = help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData`

error[E0392]: parameter `'n` is never used
   --> /Users/ryan.butler/.cargo/git/checkouts/esp-wifi-836f3b2af57fa847/69956d4/src/wifi/utils.rs:166:23
    |
166 | pub struct Socket<'s, 'n: 's> {
    |                       ^^ unused parameter
    |
    = help: consider removing `'n`, referring to it in a field, or using a marker such as `PhantomData`

Some errors have detailed explanations: E0392, E0433.
For more information about an error, try `rustc --explain E0392`.
error: could not compile `esp-wifi` due to 5 previous errors

opened by TheButlah 4

BTLE for ESP32-S3
implements BTLE support for ESP32-S3

fixes #78 - not sure why not enabling the RWBLE interrupt fixes this but for me I haven't seen that assert triggered anymore

coex is implemented but only works in opt-level 1 (seems there are still mis-optimizations going on - no idea how to find out what the problem might be) ... that's why coex on ESP32-S3 isn't mentioned in the README
opened by bjoernQ 1
Double Check Wrapping Behavior of Timers

Several functions include blocking behavior or generally deal with timers - double check them for the wrapping behavior of the timers Also note that the timers on different targets have different bit-widths

opened by bjoernQ 0
Support async

Would be very nice. I haven't actually read a lot on how it should work. We would first need embedded-svc to implement an async trait which is nightly. But I see a lot of calls like scanning that could be async and it would be pretty nice to have that, I also see that smoltcp implements Wakers for their socket stuff, could we also have async sends and receives :astonished:?

opened by ImUrX 3
Tracking Bluetooth Progress

I would like to keep this issue open to track progress towards fully working Bluetooth. Personally I am interested in seeing support for Bluetooth hid devices from the ESP32-S3.

opened by PeterHindes 0