diff --git a/src/bare-metal/microcontrollers/embedded-hal.md b/src/bare-metal/microcontrollers/embedded-hal.md
index 5e8c3da9..5a6cf581 100644
--- a/src/bare-metal/microcontrollers/embedded-hal.md
+++ b/src/bare-metal/microcontrollers/embedded-hal.md
@@ -1,25 +1,36 @@
 # `embedded-hal`
 
-The [`embedded-hal`](https://crates.io/crates/embedded-hal) crate provides a
-number of traits covering common microcontroller peripherals.
+The [`embedded-hal`] crate provides a number of traits covering common
+microcontroller peripherals:
 
 - GPIO
-- ADC
-- I2C, SPI, UART, CAN
-- RNG
-- Timers
-- Watchdogs
+- PWM
+- Delay timers
+- I2C and SPI buses and devices
 
-Other crates then implement
-[drivers](https://github.com/rust-embedded/awesome-embedded-rust#driver-crates)
-in terms of these traits, e.g. an accelerometer driver might need an I2C or SPI
-bus implementation.
+Similar traits for byte streams (e.g. UARTs), CAN buses and RNGs and broken out
+into [`embedded-io`], [`embedded-can`] and [`rand_core`] respectively.
+
+Other crates then implement [drivers] in terms of these traits, e.g. an
+accelerometer driver might need an I2C or SPI device instance.
 
 <details>
 
+- The traits cover using the peripherals but not initialising or configuring
+  them, as initialisation and configuration is usually highly platform-specific.
 - There are implementations for many microcontrollers, as well as other
   platforms such as Linux on Raspberry Pi.
-- There is work in progress on an `async` version of `embedded-hal`, but it
-  isn't stable yet.
+- [`embedded-hal-async`] provides async versions of the traits.
+- [`embedded-hal-nb`] provides another approach to non-blocking I/O, based on
+  the [`nb`] crate.
 
 </details>
+
+[drivers]: https://github.com/rust-embedded/awesome-embedded-rust#driver-crates
+[`embedded-can`]: https://crates.io/crates/embedded-can
+[`embedded-hal`]: https://crates.io/crates/embedded-hal
+[`embedded-hal-async`]: https://crates.io/crates/embedded-hal-async
+[`embedded-hal-nb`]: https://crates.io/crates/embedded-hal-nb
+[`embedded-io`]: https://crates.io/crates/embedded-io
+[`nb`]: https://crates.io/crates/nb
+[`rand_core`]: https://crates.io/crates/rand_core
diff --git a/src/bare-metal/microcontrollers/examples/Cargo.lock b/src/bare-metal/microcontrollers/examples/Cargo.lock
index 8f6df42b..b4b18c55 100644
--- a/src/bare-metal/microcontrollers/examples/Cargo.lock
+++ b/src/bare-metal/microcontrollers/examples/Cargo.lock
@@ -17,12 +17,6 @@ dependencies = [
  "rustc_version",
 ]
 
-[[package]]
-name = "bare-metal"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8fe8f5a8a398345e52358e18ff07cc17a568fbca5c6f73873d3a62056309603"
-
 [[package]]
 name = "bitfield"
 version = "0.13.2"
@@ -53,7 +47,7 @@ version = "0.7.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ec610d8f49840a5b376c69663b6369e71f4b34484b9b2eb29fb918d92516cb9"
 dependencies = [
- "bare-metal 0.2.5",
+ "bare-metal",
  "bitfield",
  "embedded-hal 0.2.7",
  "volatile-register",
@@ -79,16 +73,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "critical-section"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1706d332edc22aef4d9f23a6bb1c92360a403013c291af51247a737472dcae6"
-dependencies = [
- "bare-metal 1.0.0",
- "critical-section 1.1.2",
-]
-
 [[package]]
 name = "critical-section"
 version = "1.1.2"
@@ -101,15 +85,6 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
 
-[[package]]
-name = "embedded-dma"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46c8c02e4347a0267ca60813c952017f4c5948c232474c6010a381a337f1bda4"
-dependencies = [
- "stable_deref_trait",
-]
-
 [[package]]
 name = "embedded-dma"
 version = "0.2.0"
@@ -141,12 +116,6 @@ version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
 
-[[package]]
-name = "embedded-storage"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "723dce4e9f25b6e6c5f35628e144794e5b459216ed7da97b7c4b66cdb3fa82ca"
-
 [[package]]
 name = "embedded-storage"
 version = "0.3.1"
@@ -177,20 +146,20 @@ dependencies = [
 
 [[package]]
 name = "microbit-common"
-version = "0.13.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45651d001be4281a6f4536c30f3d8522f231bc56fd58d5baf2c630f565d31256"
+checksum = "37409f40befaa165d8a94255955475337422f5fe2fecaeeeedde170562ee114b"
 dependencies = [
- "embedded-hal 0.2.7",
- "nrf52833-hal 0.14.1",
+ "embedded-hal 1.0.0",
+ "nrf52833-hal",
  "tiny-led-matrix",
 ]
 
 [[package]]
 name = "microbit-v2"
-version = "0.13.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9895242259950730bc112623e4a2e37345dc51ddb5fc8878c110489260d84e7"
+checksum = "ba72e1c5b286e8374734e345a1c3b3d3768d77c9004bf905d2ca86e7c47088a9"
 dependencies = [
  "microbit-common",
 ]
@@ -202,8 +171,8 @@ dependencies = [
  "cortex-m-rt",
  "embedded-hal 1.0.0",
  "microbit-v2",
- "nrf52833-hal 0.17.0",
- "nrf52833-pac 0.12.2",
+ "nrf52833-hal",
+ "nrf52833-pac",
  "panic-halt",
 ]
 
@@ -224,59 +193,26 @@ checksum = "8d5439c4ad607c3c23abf66de8c8bf57ba8adcd1f129e699851a6e43935d339d"
 
 [[package]]
 name = "nrf-hal-common"
-version = "0.14.1"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd37b3fd039327b4005cc0d4ef20bce0a41bf521071774d5adb854e4b1230639"
+checksum = "56fbecd598c7f16e32bd4783447ca023aa7897d4a4c8e70f6b7c5739c81b4ceb"
 dependencies = [
  "cast",
  "cfg-if",
  "cortex-m",
- "embedded-dma 0.1.2",
- "embedded-hal 0.2.7",
- "embedded-storage 0.2.0",
- "fixed",
- "nb 1.1.0",
- "nrf-usbd 0.1.1",
- "nrf52833-pac 0.10.1",
- "rand_core",
- "void",
-]
-
-[[package]]
-name = "nrf-hal-common"
-version = "0.17.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f0280b48785ca132a353c2fc12e307d361eae4608aa8139768728bea6a05b25"
-dependencies = [
- "cast",
- "cfg-if",
- "cortex-m",
- "embedded-dma 0.2.0",
+ "embedded-dma",
  "embedded-hal 0.2.7",
  "embedded-hal 1.0.0",
  "embedded-io",
- "embedded-storage 0.3.1",
+ "embedded-storage",
  "fixed",
  "nb 1.1.0",
- "nrf-usbd 0.2.0",
- "nrf52833-pac 0.12.2",
+ "nrf-usbd",
+ "nrf52833-pac",
  "rand_core",
  "void",
 ]
 
-[[package]]
-name = "nrf-usbd"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "640e88d4c108743c667f03320d0c9ab24a20f183a7a1b18bde7891ee13fd92c5"
-dependencies = [
- "bare-metal 1.0.0",
- "cortex-m",
- "critical-section 0.2.8",
- "usb-device",
- "vcell",
-]
-
 [[package]]
 name = "nrf-usbd"
 version = "0.2.0"
@@ -284,41 +220,19 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "66b2907c0b3ec4d264981c1fc5a2321d51c463d5a63d386e573f00e84d5495e6"
 dependencies = [
  "cortex-m",
- "critical-section 1.1.2",
+ "critical-section",
  "usb-device",
  "vcell",
 ]
 
 [[package]]
 name = "nrf52833-hal"
-version = "0.14.1"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87f76d269c9a239ffe24edaa5ee0972b102c04e898b464e3e9a12ab0eacd5f76"
+checksum = "10409e4c7a9af33161da0ac7329ea50d94bec24c9184cdec6138fd2bd590bdd3"
 dependencies = [
- "embedded-hal 0.2.7",
- "nrf-hal-common 0.14.1",
- "nrf52833-pac 0.10.1",
-]
-
-[[package]]
-name = "nrf52833-hal"
-version = "0.17.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "edad8621582cbdb935c4db94e1ba66fd4975883a4b7477fdb2b4a5ae537e761a"
-dependencies = [
- "nrf-hal-common 0.17.0",
- "nrf52833-pac 0.12.2",
-]
-
-[[package]]
-name = "nrf52833-pac"
-version = "0.10.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd69bdb25903e18e098c040ef31dc863814437af010dea8bd55aa31f686cb461"
-dependencies = [
- "cortex-m",
- "cortex-m-rt",
- "vcell",
+ "nrf-hal-common",
+ "nrf52833-pac",
 ]
 
 [[package]]
diff --git a/src/bare-metal/microcontrollers/examples/Cargo.toml b/src/bare-metal/microcontrollers/examples/Cargo.toml
index 1f56ce44..64e7c8bb 100644
--- a/src/bare-metal/microcontrollers/examples/Cargo.toml
+++ b/src/bare-metal/microcontrollers/examples/Cargo.toml
@@ -7,10 +7,10 @@ edition = "2021"
 publish = false
 
 [dependencies]
-cortex-m-rt = "0.7.3"
+cortex-m-rt = "0.7.4"
 embedded-hal = "1.0.0"
-microbit-v2 = "0.13.0"
-nrf52833-hal = "0.17.0"
+microbit-v2 = "0.14.0"
+nrf52833-hal = "0.17.1"
 nrf52833-pac = { version = "0.12.2", features = ["rt"] }
 panic-halt = "0.2.0"
 
diff --git a/src/bare-metal/microcontrollers/examples/src/bin/board_support.rs b/src/bare-metal/microcontrollers/examples/src/bin/board_support.rs
index 3914845d..32a1fabd 100644
--- a/src/bare-metal/microcontrollers/examples/src/bin/board_support.rs
+++ b/src/bare-metal/microcontrollers/examples/src/bin/board_support.rs
@@ -19,7 +19,7 @@
 extern crate panic_halt as _;
 
 use cortex_m_rt::entry;
-use microbit::hal::prelude::*;
+use embedded_hal::digital::OutputPin;
 use microbit::Board;
 
 #[entry]
diff --git a/src/exercises/bare-metal/compass/Cargo.lock b/src/exercises/bare-metal/compass/Cargo.lock
index 8395de23..f6ca381f 100644
--- a/src/exercises/bare-metal/compass/Cargo.lock
+++ b/src/exercises/bare-metal/compass/Cargo.lock
@@ -17,12 +17,6 @@ dependencies = [
  "rustc_version",
 ]
 
-[[package]]
-name = "bare-metal"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8fe8f5a8a398345e52358e18ff07cc17a568fbca5c6f73873d3a62056309603"
-
 [[package]]
 name = "bitfield"
 version = "0.13.2"
@@ -70,7 +64,7 @@ version = "0.7.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ec610d8f49840a5b376c69663b6369e71f4b34484b9b2eb29fb918d92516cb9"
 dependencies = [
- "bare-metal 0.2.5",
+ "bare-metal",
  "bitfield",
  "embedded-hal 0.2.7",
  "volatile-register",
@@ -96,16 +90,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "critical-section"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1706d332edc22aef4d9f23a6bb1c92360a403013c291af51247a737472dcae6"
-dependencies = [
- "bare-metal 1.0.0",
- "critical-section 1.1.2",
-]
-
 [[package]]
 name = "critical-section"
 version = "1.1.2"
@@ -120,9 +104,9 @@ checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
 
 [[package]]
 name = "embedded-dma"
-version = "0.1.2"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46c8c02e4347a0267ca60813c952017f4c5948c232474c6010a381a337f1bda4"
+checksum = "994f7e5b5cb23521c22304927195f236813053eb9c065dd2226a32ba64695446"
 dependencies = [
  "stable_deref_trait",
 ]
@@ -144,16 +128,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "361a90feb7004eca4019fb28352a9465666b24f840f5c3cddf0ff13920590b89"
 
 [[package]]
-name = "embedded-storage"
-version = "0.2.0"
+name = "embedded-io"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "723dce4e9f25b6e6c5f35628e144794e5b459216ed7da97b7c4b66cdb3fa82ca"
+checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
+
+[[package]]
+name = "embedded-storage"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a21dea9854beb860f3062d10228ce9b976da520a73474aed3171ec276bc0c032"
 
 [[package]]
 name = "fixed"
-version = "1.24.0"
+version = "1.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02c69ce7e7c0f17aa18fdd9d0de39727adb9c6281f2ad12f57cbe54ae6e76e7d"
+checksum = "2fc715d38bea7b5bf487fcd79bcf8c209f0b58014f3018a7a19c2b855f472048"
 dependencies = [
  "az",
  "bytemuck",
@@ -173,31 +163,31 @@ dependencies = [
 
 [[package]]
 name = "lsm303agr"
-version = "0.3.0"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82d672443f0535384ea86fff40c50156c5fae3fe0446242edeb9ff993b63e0dc"
+checksum = "d4a03acd01d27c9ca96ba8205760673a23ba1914d85cc00e92a6a05963d5fe9b"
 dependencies = [
  "bitflags",
- "embedded-hal 0.2.7",
+ "embedded-hal 1.0.0",
  "nb 1.1.0",
 ]
 
 [[package]]
 name = "microbit-common"
-version = "0.13.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45651d001be4281a6f4536c30f3d8522f231bc56fd58d5baf2c630f565d31256"
+checksum = "37409f40befaa165d8a94255955475337422f5fe2fecaeeeedde170562ee114b"
 dependencies = [
- "embedded-hal 0.2.7",
+ "embedded-hal 1.0.0",
  "nrf52833-hal",
  "tiny-led-matrix",
 ]
 
 [[package]]
 name = "microbit-v2"
-version = "0.13.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9895242259950730bc112623e4a2e37345dc51ddb5fc8878c110489260d84e7"
+checksum = "ba72e1c5b286e8374734e345a1c3b3d3768d77c9004bf905d2ca86e7c47088a9"
 dependencies = [
  "microbit-common",
 ]
@@ -219,15 +209,16 @@ checksum = "8d5439c4ad607c3c23abf66de8c8bf57ba8adcd1f129e699851a6e43935d339d"
 
 [[package]]
 name = "nrf-hal-common"
-version = "0.14.1"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd37b3fd039327b4005cc0d4ef20bce0a41bf521071774d5adb854e4b1230639"
+checksum = "56fbecd598c7f16e32bd4783447ca023aa7897d4a4c8e70f6b7c5739c81b4ceb"
 dependencies = [
  "cast",
  "cfg-if",
  "cortex-m",
  "embedded-dma",
- "embedded-hal 0.2.7",
+ "embedded-hal 1.0.0",
+ "embedded-io",
  "embedded-storage",
  "fixed",
  "nb 1.1.0",
@@ -239,33 +230,31 @@ dependencies = [
 
 [[package]]
 name = "nrf-usbd"
-version = "0.1.1"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "640e88d4c108743c667f03320d0c9ab24a20f183a7a1b18bde7891ee13fd92c5"
+checksum = "66b2907c0b3ec4d264981c1fc5a2321d51c463d5a63d386e573f00e84d5495e6"
 dependencies = [
- "bare-metal 1.0.0",
  "cortex-m",
- "critical-section 0.2.8",
+ "critical-section",
  "usb-device",
  "vcell",
 ]
 
 [[package]]
 name = "nrf52833-hal"
-version = "0.14.1"
+version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87f76d269c9a239ffe24edaa5ee0972b102c04e898b464e3e9a12ab0eacd5f76"
+checksum = "10409e4c7a9af33161da0ac7329ea50d94bec24c9184cdec6138fd2bd590bdd3"
 dependencies = [
- "embedded-hal 0.2.7",
  "nrf-hal-common",
  "nrf52833-pac",
 ]
 
 [[package]]
 name = "nrf52833-pac"
-version = "0.10.1"
+version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd69bdb25903e18e098c040ef31dc863814437af010dea8bd55aa31f686cb461"
+checksum = "10e1358255b360cdc816dd7b6ef81be8c8499c0998277e5249bed222bd0f5241"
 dependencies = [
  "cortex-m",
  "cortex-m-rt",
diff --git a/src/exercises/bare-metal/compass/Cargo.toml b/src/exercises/bare-metal/compass/Cargo.toml
index d2599665..b5053ce4 100644
--- a/src/exercises/bare-metal/compass/Cargo.toml
+++ b/src/exercises/bare-metal/compass/Cargo.toml
@@ -9,6 +9,6 @@ publish = false
 [dependencies]
 cortex-m-rt = "0.7.3"
 embedded-hal = "1.0.0"
-lsm303agr = "0.3.0"
-microbit-v2 = "0.13.0"
+lsm303agr = "1.0.0"
+microbit-v2 = "0.14.0"
 panic-halt = "0.2.0"
diff --git a/src/exercises/bare-metal/compass/src/main.rs b/src/exercises/bare-metal/compass/src/main.rs
index 3e9c8b25..ac93faa3 100644
--- a/src/exercises/bare-metal/compass/src/main.rs
+++ b/src/exercises/bare-metal/compass/src/main.rs
@@ -23,11 +23,11 @@ use core::fmt::Write;
 use cortex_m_rt::entry;
 // ANCHOR_END: top
 use core::cmp::{max, min};
+use embedded_hal::digital::InputPin;
 use lsm303agr::{
     AccelMode, AccelOutputDataRate, Lsm303agr, MagMode, MagOutputDataRate,
 };
 use microbit::display::blocking::Display;
-use microbit::hal::prelude::*;
 use microbit::hal::twim::Twim;
 use microbit::hal::uarte::{Baudrate, Parity, Uarte};
 use microbit::hal::{Delay, Timer};
@@ -40,7 +40,7 @@ const ACCELEROMETER_SCALE: i32 = 700;
 // ANCHOR: main
 #[entry]
 fn main() -> ! {
-    let board = Board::take().unwrap();
+    let mut board = Board::take().unwrap();
 
     // Configure serial port.
     let mut serial = Uarte::new(