diff --git a/bluetooth_connect/bluetooth_connect.ino b/bluetooth_connect/bluetooth_connect.ino
index fd7ed41..ef81fde 100644
--- a/bluetooth_connect/bluetooth_connect.ino
+++ b/bluetooth_connect/bluetooth_connect.ino
@@ -1,39 +1,11 @@
-/**
- * Bluetooth Classic Example
- * Scan for devices - asyncronously, print device as soon as found
- * query devices for SPP - SDP profile
- * connect to first device offering a SPP connection
- * 
- * Example python server:
- * source: https://gist.github.com/ukBaz/217875c83c2535d22a16ba38fc8f2a91
- *
- * Tested with Raspberry Pi onboard Wifi/BT, USB BT 4.0 dongles, USB BT 1.1 dongles, 
- * 202202: does NOT work with USB BT 2.0 dongles when esp32 aduino lib is compiled with SSP support!
- *         see https://github.com/espressif/esp-idf/issues/8394
- *         
- * use ESP_SPP_SEC_ENCRYPT|ESP_SPP_SEC_AUTHENTICATE in connect() if remote side requests 'RequireAuthentication': dbus.Boolean(True),
- * use ESP_SPP_SEC_NONE or ESP_SPP_SEC_ENCRYPT|ESP_SPP_SEC_AUTHENTICATE in connect() if remote side has Authentication: False
- */
-
 #include <map>
 #include <BluetoothSerial.h>
 
-#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
-#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
-#endif
-
-#if !defined(CONFIG_BT_SPP_ENABLED)
-#error Serial Bluetooth not available or not enabled. It is only available for the ESP32 chip.
-#endif
-
 BluetoothSerial SerialBT;
 
-
 #define BT_DISCOVER_TIME  10000
-esp_spp_sec_t sec_mask=ESP_SPP_SEC_NONE; // or ESP_SPP_SEC_ENCRYPT|ESP_SPP_SEC_AUTHENTICATE to request pincode confirmation
-esp_spp_role_t role=ESP_SPP_ROLE_SLAVE; // or ESP_SPP_ROLE_MASTER
-
-// std::map<BTAddress, BTAdvertisedDeviceSet> btDeviceList;
+esp_spp_sec_t sec_mask=ESP_SPP_SEC_NONE;
+esp_spp_role_t role=ESP_SPP_ROLE_SLAVE;
 
 void setup() {
   Serial.begin(115200);
@@ -41,15 +13,10 @@ void setup() {
     Serial.println("========== serialBT failed!");
     abort();
   }
-  // SerialBT.setPin("1234"); // doesn't seem to change anything
-  // SerialBT.enableSSP(); // doesn't seem to change anything
-
 
   Serial.println("Starting discoverAsync...");
-  BTScanResults* btDeviceList = SerialBT.getScanResults();  // maybe accessing from different threads!
+  BTScanResults* btDeviceList = SerialBT.getScanResults();
   if (SerialBT.discoverAsync([](BTAdvertisedDevice* pDevice) {
-      // BTAdvertisedDeviceSet*set = reinterpret_cast<BTAdvertisedDeviceSet*>(pDevice);
-      // btDeviceList[pDevice->getAddress()] = * set;
       Serial.printf(">>>>>>>>>>>Found a new device asynchronously: %s\n", pDevice->toString().c_str());
     } )
     ) {
@@ -87,13 +54,9 @@ void setup() {
   }
 }
 
-
-String sendData="Hi from esp32!\n";
-
 void loop() {
   if(! SerialBT.isClosed() && SerialBT.connected()) {
     if(SerialBT.available()) {
-      Serial.print("rx: ");
       while(SerialBT.available()) {
         int c=SerialBT.read();
         if(c >= 0) {