diff --git a/platformio.ini b/platformio.ini
index bcca900..3c57c5d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -9,7 +9,7 @@
 ; http://docs.platformio.org/page/projectconf.html
 [platformio]
 default_envs = 
-    lolin32-example-input
+    esp32c3supermini-example-bleled
 ;
 ; common options for all variants of iotsa
 ;
@@ -123,6 +123,13 @@ board_build.mcu = esp32c3
 board_build.partitions = bare_minimum_2MB.csv
 board_upload.flash_size = 2MB
 
+[esp32c3supermini]
+extends = esp32c3
+board = esp32-c3-devkitm-1
+board_build.mcu = esp32c3
+board_build.partitions = min_spiffs.csv
+board_upload.flash_size = 4MB
+
 [example-hello]
 build_src_filter = +<*> +<../examples/Hello>
 
@@ -240,6 +247,10 @@ build_flags = -DIOTSA_BLE_DEBUG -DIOTSA_WITH_BLE -DNEOPIXEL_PIN=2 -DWITHOUT_VOLT
 extends = esp32c3lcd, example-bleled
 build_flags = -DIOTSA_BLE_DEBUG -DIOTSA_WITH_BLE -DNEOPIXEL_PIN=2 -DWITHOUT_VOLTAGE ${esp32c3lcd.build_flags}
 
+[env:esp32c3supermini-example-bleled]
+extends = esp32c3supermini, example-bleled
+build_flags = -DIOTSA_BLE_DEBUG -DIOTSA_WITH_BLE -DNEOPIXEL_PIN=2 -DWITHOUT_VOLTAGE ${esp32c3supermini.build_flags}  -DIOTSA_DELAY_ON_BOOT=3 -DCONFIG_NIMBLE_CPP_DEBUG_LEVEL=4 -DCORE_DEBUG_LEVEL=6 -DIOTSA_BLE_DEBUG=1
+
 [env:esp32thing-example-nonimbleled]
 extends = esp32thing, example-bleled
 build_flags = -DIOTSA_WITH_BLE -DIOTSA_WITHOUT_NIMBLE
diff --git a/src/iotsaBLEServer.cpp b/src/iotsaBLEServer.cpp
index ae85a3d..e4242ff 100644
--- a/src/iotsaBLEServer.cpp
+++ b/src/iotsaBLEServer.cpp
@@ -23,26 +23,22 @@ class IotsaBLEServerCallbacks : public BLEServerCallbacks {
   }
 };
 
-class IotsaBLECharacteristicCallbacks : public BLECharacteristicCallbacks {
+class IotsaBLECharacteristicCallbacks : public NimBLECharacteristicCallbacks {
 public:
   IotsaBLECharacteristicCallbacks(UUIDstring _charUUID, IotsaBLEApiProvider *_api)
   : charUUID(_charUUID),
     api(_api)
   {}
 
-	void onRead(BLECharacteristic* pCharacteristic) {
+	void onRead(BLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo) override {
     IFBLEDEBUG IotsaSerial.printf("BLE char onRead %s\n", pCharacteristic->getUUID().toString().c_str());
     iotsaConfig.postponeSleep(0);
     api->bleGetHandler(charUUID);
   }
-	void onWrite(BLECharacteristic* pCharacteristic) {
+	void onWrite(BLECharacteristic* pCharacteristic, NimBLEConnInfo& connInfo) override {
     IFBLEDEBUG IotsaSerial.printf("BLE char onWrite %s\n", pCharacteristic->getUUID().toString().c_str());
     iotsaConfig.postponeSleep(0);
     api->blePutHandler(charUUID);
-  }
-	void onNotify(BLECharacteristic* pCharacteristic) {
-    IFBLEDEBUG IotsaSerial.printf("BLE char onNotify %s\n", pCharacteristic->getUUID().toString().c_str());
-    iotsaConfig.postponeSleep(0);
   }
 	void onStatus(BLECharacteristic* pCharacteristic, uint32_t code) {
     iotsaConfig.postponeSleep(0);