^{Originally posted by adm1nsys August 29, 2025}
Hello to everyone! Is it possible to run Matter Over Thread no WiFi in Arduno IDE?
I made code which enable BLE first setup and then it's Matter Over WiFi. It's like mix mode. Can I make Matter Over Thread?

#define CONFIG_ENABLE_CHIPOBLE 1 
#define CHIP_DEVICE_CONFIG_ENABLE_THREAD 1
#define CHIP_DEVICE_CONFIG_ENABLE_WIFI 0 
#include <Matter.h>
#include <Preferences.h>
#include <platform/CHIPDeviceLayer.h>
#include <platform/ConnectivityManager.h>
using namespace chip::DeviceLayer;
#include "esp_mac.h"
// Matter endpoint: On/Off Light
MatterOnOffLight OnOffLight;
Preferences matterPref;
#ifndef LED_BUILTIN
# define LED_BUILTIN 2
#endif
const uint8_t ledPin = LED_BUILTIN;
const uint8_t buttonPin = BOOT_PIN; // BOOT 
const char *nsName = "MatterPrefs";
const char *onOffKey = "OnOff";
uint32_t btn_ts = 0;
bool btn_down = false;
const uint32_t debounceMs = 250;
const uint32_t decommissionHoldMs = 5000;
bool setLightOnOff(bool state) {
 digitalWrite(ledPin, state ? HIGH : LOW);
 matterPref.putBool(onOffKey, state);
 return true;
}
void printMacs() {
 uint8_t mac[6];
 esp_read_mac(mac, ESP_MAC_WIFI_STA);
 Serial.printf("WiFi STA MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
 mac[0],mac[1],mac[2],mac[3],mac[4],mac[5]);
 esp_read_mac(mac, ESP_MAC_WIFI_SOFTAP);
 Serial.printf("WiFi AP MAC: %02X:%02X:%02X:%02X:%02X:%02X\n",
 mac[0],mac[1],mac[2],mac[3],mac[4],mac[5]);
}
void setup() {
 Serial.begin(115200);
 pinMode(ledPin, OUTPUT);
 pinMode(buttonPin, INPUT_PULLUP);
 ConnectivityMgr().SetWiFiStationMode(ConnectivityManager::kWiFiStationMode_Disabled);
 ConnectivityMgr().ClearWiFiStationProvision();
 printMacs();
 matterPref.begin(nsName, false);
 bool last = matterPref.getBool(onOffKey, true);
 OnOffLight.begin(last);
 OnOffLight.onChange(setLightOnOff);
 Matter.begin();
 if (!Matter.isDeviceCommissioned()) {
 Serial.println("\n=== Matter over Thread (BLE commissioning) ===");
 Serial.printf("Manual pairing code: %s\n", Matter.getManualPairingCode().c_str());
 Serial.printf("QR code URL: %s\n", Matter.getOnboardingQRCodeUrl().c_str());
 } else {
 Serial.printf("Resumed. Initial state: %s\n", OnOffLight.getOnOff() ? "ON" : "OFF");
 OnOffLight.updateAccessory();
 }
}
void loop() {
 static uint32_t lastNote = 0;
 if (!Matter.isDeviceCommissioned() && millis() - lastNote > 5000) {
 Serial.println("Waiting for commissioning...");
 lastNote = millis();
 }
 if (digitalRead(buttonPin) == LOW && !btn_down) {
 btn_down = true;
 btn_ts = millis();
 }
 uint32_t dt = millis() - btn_ts;
 if (btn_down && dt > debounceMs && digitalRead(buttonPin) == HIGH) {
 btn_down = false;
 OnOffLight.toggle();
 }
 if (btn_down && dt > decommissionHoldMs) {
 Serial.println("Decommissioning...");
 OnOffLight.setOnOff(false);
 Matter.decommission();
 btn_ts = millis();
 }
}

E (xxxx) OPENTHREAD: esp_openthread_task_queue_init(...): Failed to create OpenThread task queue event fd
E (xxxx) OPENTHREAD: esp_openthread_platform_init(...): esp_openthread_task_queue_init failed
assert failed: modem_clock_device_disable modem_clock.c:236 (refs >= 0)

# 802.15.4 + OpenThread
CONFIG_IEEE802154_ENABLED=y
CONFIG_OPENTHREAD_ENABLED=y
CONFIG_OPENTHREAD_RADIO_NATIVE=y
CONFIG_OPENTHREAD_FTD=y # (or MTD if preferred)
# VFS / eventfd (fixes the crash)
CONFIG_VFS_SUPPORT_SELECT=y
CONFIG_ESP_EVENTFD=y
# Network for Matter over Thread
CONFIG_LWIP_IPV6=y
CONFIG_LWIP_IPV4=n
# Matter / CHIP
CONFIG_ENABLE_MATTER_OVER_THREAD=y
CONFIG_ENABLE_CHIPOBLE=y
# Disable radio competitors in this build
CONFIG_ZB_ENABLED=n
CONFIG_WIFI_ENABLED=n