diff --git a/.gitignore b/.gitignore
index c8e9e48..636e67c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 target
 Cargo.lock
 .vscode
+.embuild
diff --git a/Cargo.toml b/Cargo.toml
index 268671d..f785efa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,3 +2,11 @@
 members = ["matter", "matter_macro_derive", "tools/tlv_tool"]
 
 exclude = ["examples/*"]
+
+# For compatibility with ESP IDF
+[patch.crates-io]
+smol = { git = "https://github.com/esp-rs-compat/smol" }
+polling = { git = "https://github.com/esp-rs-compat/polling" }
+socket2 = { git = "https://github.com/esp-rs-compat/socket2" }
+chrono = { git = "https://github.com/ivmarkov/chrono" }
+time = { git = "https://github.com/ivmarkov/time", branch = "master" }
diff --git a/matter/Cargo.toml b/matter/Cargo.toml
index 8c4179a..a1f0840 100644
--- a/matter/Cargo.toml
+++ b/matter/Cargo.toml
@@ -16,13 +16,12 @@ path = "src/lib.rs"
 
 [features]
 default = ["std", "crypto_mbedtls", "backtrace"]
-std = ["alloc", "env_logger", "chrono", "rand", "qrcode", "libmdns", "simple-mdns", "simple-dns", "smol"]
+std = ["alloc", "env_logger", "chrono", "time", "rand", "qrcode", "libmdns", "simple-mdns", "simple-dns", "async-io", "smol"]
 backtrace = []
 alloc = []
 nightly = []
 crypto_openssl = ["alloc", "openssl", "foreign-types", "hmac", "sha2"]
-crypto_mbedtls = ["alloc", "mbedtls"]
-crypto_esp_mbedtls = ["esp-idf-sys"]
+crypto_mbedtls = ["alloc", "mbedtls", "esp-idf-sys"]
 crypto_rustcrypto = ["alloc", "sha2", "hmac", "pbkdf2", "hkdf", "aes", "ccm", "p256", "elliptic-curve", "crypto-bigint", "x509-cert", "rand_core"]
 
 [dependencies]
@@ -39,23 +38,22 @@ no-std-net = "0.6"
 subtle = "2.4.1"
 safemem = "0.3.3"
 owo-colors = "3"
+verhoeff = { version = "1", default-features = false }
 
 # STD-only dependencies
-env_logger = { version = "0.10.0", default-features = false, optional = true }
-chrono = { version = "0.4.23", optional = true, default-features = false, features = ["clock", "std"] }
+chrono = { version = "=0.4.19", optional = true, default-features = false, features = ["clock", "std"] } # =0.4.19 for compatibility with ESP IDF
+time = { version = "0.1", optional = true, default-features = false }
 rand = { version = "0.8.5", optional = true }
 qrcode = { version = "0.12", default-features = false, optional = true } # Print QR code
-libmdns = { version = "0.7", optional = true }
 simple-mdns = { version = "0.4", features = ["sync"], optional = true }
 simple-dns = { version = "0.5", optional = true }
 astro-dnssd = { version = "0.3", optional = true } # On Linux needs avahi-compat-libdns_sd, i.e. on Ubuntu/Debian do `sudo apt-get install libavahi-compat-libdnssd-dev`
 zeroconf = { version = "0.10", optional = true }
-smol = { version = "1.3.0", optional = true}
+smol = { version = "1.2", optional = true } # =1.2 for compatibility with ESP IDF
+async-io = { version = "=1.12", optional = true } # =1.2 for compatibility with ESP IDF
 
 # crypto
 openssl = { git = "https://github.com/sfackler/rust-openssl", optional = true }
-mbedtls = { git = "https://github.com/fortanix/rust-mbedtls", optional = true }
-esp-idf-sys = { version = "0.32", optional = true }
 
 # rust-crypto
 foreign-types = { version = "0.3.2", optional = true }
@@ -71,8 +69,13 @@ crypto-bigint = { version = "0.4", default-features = false, optional = true }
 rand_core = { version = "0.6", default-features = false, optional = true }
 x509-cert = { version = "0.2.0", default-features = false, features = ["pem"], optional = true } # TODO: requires `alloc`
 
-# to compute the check digit
-verhoeff = "1"
+[target.'cfg(not(target_os = "espidf"))'.dependencies]
+mbedtls = { git = "https://github.com/fortanix/rust-mbedtls", optional = true }
+env_logger = { version = "0.10.0", optional = true }
+libmdns = { version = "0.7", optional = true }
+
+[target.'cfg(target_os = "espidf")'.dependencies]
+esp-idf-sys = { version = "0.32", default-features = false, features = ["native"], optional = true }
 
 [[example]]
 name = "onoff_light"
diff --git a/matter/src/crypto/crypto_esp_mbedtls.rs b/matter/src/crypto/crypto_esp_mbedtls.rs
index cad046b..2fff707 100644
--- a/matter/src/crypto/crypto_esp_mbedtls.rs
+++ b/matter/src/crypto/crypto_esp_mbedtls.rs
@@ -18,6 +18,7 @@
 use log::error;
 
 use crate::error::{Error, ErrorCode};
+use crate::utils::rand::Rand;
 
 pub fn hkdf_sha256(_salt: &[u8], _ikm: &[u8], _info: &[u8], _key: &mut [u8]) -> Result<(), Error> {
     error!("This API should never get called");
@@ -60,10 +61,11 @@ impl HmacSha256 {
     }
 }
 
+#[derive(Debug)]
 pub struct KeyPair {}
 
 impl KeyPair {
-    pub fn new() -> Result<Self, Error> {
+    pub fn new(_rand: Rand) -> Result<Self, Error> {
         error!("This API should never get called");
 
         Ok(Self {})
diff --git a/matter/src/crypto/mod.rs b/matter/src/crypto/mod.rs
index 47d49b7..85c40b0 100644
--- a/matter/src/crypto/mod.rs
+++ b/matter/src/crypto/mod.rs
@@ -37,14 +37,14 @@ pub const ECDH_SHARED_SECRET_LEN_BYTES: usize = 32;
 
 pub const EC_SIGNATURE_LEN_BYTES: usize = 64;
 
-#[cfg(feature = "crypto_esp_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", target_os = "espidf"))]
 mod crypto_esp_mbedtls;
-#[cfg(feature = "crypto_esp_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", target_os = "espidf"))]
 pub use self::crypto_esp_mbedtls::*;
 
-#[cfg(feature = "crypto_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", not(target_os = "espidf")))]
 mod crypto_mbedtls;
-#[cfg(feature = "crypto_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", not(target_os = "espidf")))]
 pub use self::crypto_mbedtls::*;
 
 #[cfg(feature = "crypto_openssl")]
@@ -60,14 +60,12 @@ pub use self::crypto_rustcrypto::*;
 #[cfg(not(any(
     feature = "crypto_openssl",
     feature = "crypto_mbedtls",
-    feature = "crypto_esp_mbedtls",
     feature = "crypto_rustcrypto"
 )))]
 pub mod crypto_dummy;
 #[cfg(not(any(
     feature = "crypto_openssl",
     feature = "crypto_mbedtls",
-    feature = "crypto_esp_mbedtls",
     feature = "crypto_rustcrypto"
 )))]
 pub use self::crypto_dummy::*;
diff --git a/matter/src/error.rs b/matter/src/error.rs
index 507ce4b..e15cbb7 100644
--- a/matter/src/error.rs
+++ b/matter/src/error.rs
@@ -157,7 +157,7 @@ impl From<openssl::error::ErrorStack> for Error {
     }
 }
 
-#[cfg(feature = "crypto_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", not(target_os = "espidf")))]
 impl From<mbedtls::Error> for Error {
     fn from(e: mbedtls::Error) -> Self {
         ::log::error!("Error in TLS: {}", e);
@@ -165,6 +165,14 @@ impl From<mbedtls::Error> for Error {
     }
 }
 
+#[cfg(all(feature = "crypto_mbedtls", target_os = "espidf"))]
+impl From<esp_idf_sys::EspError> for Error {
+    fn from(e: esp_idf_sys::EspError) -> Self {
+        ::log::error!("Error in TLS: {}", e);
+        Self::new(ErrorCode::TLSStack)
+    }
+}
+
 #[cfg(feature = "crypto_rustcrypto")]
 impl From<ccm::aead::Error> for Error {
     fn from(_e: ccm::aead::Error) -> Self {
diff --git a/matter/src/mdns.rs b/matter/src/mdns.rs
index eb19a9f..defb137 100644
--- a/matter/src/mdns.rs
+++ b/matter/src/mdns.rs
@@ -475,7 +475,7 @@ pub mod astro {
 //     }
 // }
 
-#[cfg(feature = "std")]
+#[cfg(all(feature = "std", not(target_os = "espidf")))]
 pub mod libmdns {
     use super::Mdns;
     use crate::error::Error;
diff --git a/matter/src/secure_channel/crypto.rs b/matter/src/secure_channel/crypto.rs
index d1292eb..027db69 100644
--- a/matter/src/secure_channel/crypto.rs
+++ b/matter/src/secure_channel/crypto.rs
@@ -18,13 +18,12 @@
 #[cfg(not(any(
     feature = "crypto_openssl",
     feature = "crypto_mbedtls",
-    feature = "crypto_esp_mbedtls",
     feature = "crypto_rustcrypto"
 )))]
 pub use super::crypto_dummy::CryptoSpake2;
-#[cfg(feature = "crypto_esp_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", target_os = "espidf"))]
 pub use super::crypto_esp_mbedtls::CryptoSpake2;
-#[cfg(feature = "crypto_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", not(target_os = "espidf")))]
 pub use super::crypto_mbedtls::CryptoSpake2;
 #[cfg(feature = "crypto_openssl")]
 pub use super::crypto_openssl::CryptoSpake2;
diff --git a/matter/src/secure_channel/crypto_esp_mbedtls.rs b/matter/src/secure_channel/crypto_esp_mbedtls.rs
index 316276b..d1d77ee 100644
--- a/matter/src/secure_channel/crypto_esp_mbedtls.rs
+++ b/matter/src/secure_channel/crypto_esp_mbedtls.rs
@@ -16,6 +16,7 @@
  */
 
 use crate::error::Error;
+use crate::utils::rand::Rand;
 
 const MATTER_M_BIN: [u8; 65] = [
     0x04, 0x88, 0x6e, 0x2f, 0x97, 0xac, 0xe4, 0x6e, 0x55, 0xba, 0x9d, 0xd7, 0x24, 0x25, 0x79, 0xf2,
@@ -77,7 +78,16 @@ impl CryptoSpake2 {
     }
 
     #[allow(non_snake_case)]
-    pub fn get_pB(&mut self, pB: &mut [u8]) -> Result<(), Error> {
+    #[allow(dead_code)]
+    pub fn set_L_from_w1s(&mut self, w1s: &[u8]) -> Result<(), Error> {
+        // From the Matter spec,
+        //        L = w1 * P
+        //    where P is the generator of the underlying elliptic curve
+        Ok(())
+    }
+
+    #[allow(non_snake_case)]
+    pub fn get_pB(&mut self, pB: &mut [u8], _rand: Rand) -> Result<(), Error> {
         // From the SPAKE2+ spec (https://datatracker.ietf.org/doc/draft-bar-cfrg-spake2plus/)
         //   for y
         //   - select random y between 0 to p
diff --git a/matter/src/secure_channel/mod.rs b/matter/src/secure_channel/mod.rs
index 15417b3..58020b4 100644
--- a/matter/src/secure_channel/mod.rs
+++ b/matter/src/secure_channel/mod.rs
@@ -20,13 +20,12 @@ pub mod common;
 #[cfg(not(any(
     feature = "crypto_openssl",
     feature = "crypto_mbedtls",
-    feature = "crypto_esp_mbedtls",
     feature = "crypto_rustcrypto"
 )))]
 mod crypto_dummy;
-#[cfg(feature = "crypto_esp_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", target_os = "espidf"))]
 mod crypto_esp_mbedtls;
-#[cfg(feature = "crypto_mbedtls")]
+#[cfg(all(feature = "crypto_mbedtls", not(target_os = "espidf")))]
 mod crypto_mbedtls;
 #[cfg(feature = "crypto_openssl")]
 pub mod crypto_openssl;
diff --git a/matter/tests/common/mod.rs b/matter/tests/common/mod.rs
index 96682b9..94837fc 100644
--- a/matter/tests/common/mod.rs
+++ b/matter/tests/common/mod.rs
@@ -22,7 +22,7 @@ pub mod handlers;
 pub mod im_engine;
 
 pub fn init_env_logger() {
-    #[cfg(feature = "std")]
+    #[cfg(all(feature = "std", not(target_os = "espidf")))]
     {
         let _ = env_logger::try_init();
     }