diff --git a/templates/f7/compile b/templates/f7/compile
index 52b69fa..e4c827b 100755
--- a/templates/f7/compile
+++ b/templates/f7/compile
@@ -13,9 +13,10 @@ mv build/f7.bin .
 mv build/f7.hex . 
 mv build/f7.elf .
 
-rm ./Drivers
+rm -rf ./Drivers
 rm -rf ./build/
 
-exit EXIT_CODE
+exit $EXIT_CODE
+
 
 
diff --git a/templates/longan-nano/src/main.ino b/templates/longan-nano/src/main.ino
index e760eec..72ce48f 100644
--- a/templates/longan-nano/src/main.ino
+++ b/templates/longan-nano/src/main.ino
@@ -7,7 +7,7 @@
 #define CMDBUF_LEN 200
 static uint8_t cmdbuf[CMDBUF_LEN];
 
-#define CRYPTO_BUSY PA7
+#define CRYPTO_BUSY PB9
 #define noInterrupts() eclic_global_interrupt_disable()
 #define interrupts() eclic_global_interrupt_disable()
 #define yield() do {} while(0)
@@ -32,8 +32,6 @@ extern "C" {
 
 static void init_uart0(void)
 {
-    // enable GPIO clock 
-    rcu_periph_clock_enable(RCU_GPIOA);
     // enable USART0 clock 
     rcu_periph_clock_enable(RCU_USART0);  
     // configure USART0
@@ -79,6 +77,8 @@ void my_assert(bool b) {
 }
 
 void setup() {
+    rcu_periph_clock_enable(RCU_GPIOA);
+    rcu_periph_clock_enable(RCU_GPIOB);
     init_uart0();
     pinMode(CRYPTO_BUSY, OUTPUT);
     digitalWrite(CRYPTO_BUSY, HIGH);
diff --git a/test-scheduler.py b/test-scheduler.py
index 8e657a8..4dfd9c8 100644
--- a/test-scheduler.py
+++ b/test-scheduler.py
@@ -260,7 +260,7 @@ class ScheduleJob(Resource):
             'cipher', 'cipher_timestamp'
         ]
         for k in mandatory_fields:
-            if k not in data:
+            if k not in data or len(k) == 0:
                 return 'field "%s" expected' % k, 400
 
         schedule.append(ScheduledTest(**data))