diff --git a/subprocess.log b/subprocess.log
new file mode 100644
index 0000000..d1d4ea4
--- /dev/null
+++ b/subprocess.log
@@ -0,0 +1,22 @@
+Read following action from stdin: c
+Data sent to serial: b'c \x00\x00\x00'
+Data sent to serial: b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+Read following action from stdin: s
+Data sent to serial: b's\x00\x00\x00\x00'
+Data sent to serial: b''
+Read following action from stdin: m
+Data sent to serial: b'm\x00\x00\x00\x00'
+Data sent to serial: b''
+Read following action from stdin: a
+Data sent to serial: b'a\x00\x00\x00\x00'
+Data sent to serial: b''
+Read following action from stdin: k
+Data sent to serial: b'k\x10\x00\x00\x00'
+Data sent to serial: b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f'
+Read following action from stdin: p
+Data sent to serial: b'p\x0f\x00\x00\x00'
+Data sent to serial: b'\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e'
+Read following action from stdin: e
+Data sent to serial: b'e'
+Read following action from stdin: C
+Data sent to serial: b'C'
diff --git a/templates/blackpill/Src/main.c b/templates/blackpill/Src/main.c
index 0a642f7..52039ba 100644
--- a/templates/blackpill/Src/main.c
+++ b/templates/blackpill/Src/main.c
@@ -52,6 +52,7 @@ unsigned char m[MAX_LEN];
 unsigned long long mlen = 0;
 unsigned char ad[MAX_LEN];
 unsigned long long adlen = 0;
+unsigned char text[6] = "HELLO";
 
 unsigned char nsec[CRYPTO_NSECBYTES];
 const unsigned long long nslen = CRYPTO_NSECBYTES;
@@ -80,17 +81,12 @@ static void write_serial(const void *src, unsigned int len) {
 	for (int i = 0; i < len; i++) {
 		while (!LL_USART_IsActiveFlag_TXE(USART1));
 		LL_USART_TransmitData8(USART1, buf[i]);
-    LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
-    LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
-    LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
-    LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
 	}
 }
 
 static void read_variable_serial(unsigned char action) {
 	uint32_t len;
 	read_serial(&len, sizeof(len));
-
 	switch(action) {
 		case 'k':
 			while (len != CRYPTO_KEYBYTES);
@@ -187,7 +183,16 @@ int main(void)
 				read_variable_serial(rcv);
 				break;
 
-			case 'C': write_variable_serial(c, clen); break;
+			case 'C': 
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        write_variable_serial(c, clen); 
+        break;
 			case 'M': write_variable_serial(m, mlen); break;
 			case 'A': write_variable_serial(ad, adlen); break;
 			case 'K': write_variable_serial(k, klen); break;
@@ -195,15 +200,30 @@ int main(void)
 			case 'P': write_variable_serial(npub, nplen); break;
 
 			case 'd':
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
 				res = crypto_aead_decrypt(m, &mlen,	nsec, c, clen, ad, adlen, npub, k);
 				break;
 
 			case 'e':
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
+        LL_mDelay(500);
+        LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_12);
 				res = crypto_aead_encrypt(c, &clen, m, mlen, ad, adlen, nsec, npub, k);
 				break;
 
 			default:
-				return 2;
+        LL_mDelay(1);
+
 		}
 		/* USER CODE END WHILE */
 	}
diff --git a/templates/blackpill/middleware.py b/templates/blackpill/middleware.py
index 5d077a3..a38816e 100755
--- a/templates/blackpill/middleware.py
+++ b/templates/blackpill/middleware.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/python3 -u
 
 import os
 import sys
@@ -6,6 +6,8 @@ import struct
 import serial
 from subprocess import Popen, PIPE, run
 
+f = open("subprocess.log", "w+")
+
 ser = serial.Serial('/dev/ttyUSB0', 115200)
 
 def flash():
@@ -25,6 +27,7 @@ def read(channel, l):
 def write(channel, data):
     if channel == 'ser':
         l = ser.write(data)
+        f.write("Data sent to serial: " + str(data) + "\n")
     elif channel == 'std':
         l = sys.stdout.write(data)
     else:
@@ -47,20 +50,22 @@ def main():
     #flash()
     while(1):
         action = read('std', 1)
-        if (action):
-            if action == 'c' or action == 'm' or action == 'a' or action == 'k' or action == 's' or action == 'p':
-                data = obtain('std')
-                submit('ser', action, data)
+        f.write("Read following action from stdin: " + action + "\n")
+        if action == 'c' or action == 'm' or action == 'a' or action == 'k' or action == 's' or action == 'p':
+            data = obtain('std')
+            submit('ser', action, data)
 
-            elif action == 'e' or action == 'd':
-                write('ser', str.encode(action))
+        elif action == 'e' or action == 'd':
+            write('ser', str.encode(action))
 
-            elif action == 'C' or action == 'M' or action == 'A' or action == 'K' or action == 'S' or action == 'P':
-                write('ser', str.encode(action))
-                data = obtain('ser')
-                submit('std', action, data)
-            else:
-                raise Exception("no capiche aczione %s" % (action))
+        elif action == 'C' or action == 'M' or action == 'A' or action == 'K' or action == 'S' or action == 'P':
+            write('ser', str.encode(action))
+            data = obtain('ser')
+            f.write("Obtained following data from serial: " + data + "\n")
+            submit('std', action, data)
+            f.write("Submitted following data to stdout: " + data + "\n")
+        else:
+            raise Exception("no capiche aczione %s" % (action))
                 
 if __name__ == "__main__":
     sys.exit(main())