went more context sensitive and it seem to be working better

main.py

@@ -4,12 +4,12 @@ from PicoAirQuality import  KitronikBME688, KitronikButton, KitronikDataLogger,
                             KitronikOLED, KitronikRTC, KitronikZIPLEDs,\
                             KitronikBuzzer
 import time
-from array import array
+
 #from datetime import datetime
 
 logFileName = "atmosphere_log.txt"
- 
-
+mindex=0
+morse = []
 bme688 = KitronikBME688()
 oled = KitronikOLED()
 rtc = KitronikRTC()
@@ -28,6 +28,8 @@ beeper  = KitronikBuzzer()
 buttons = KitronikButton()
 last_pv = 0
 last_tt = 0
+spurious = 0 # interrupts are often repeated for the low level
+
 # make this array size 20. A morse char of 5 dots|dashes
 # would take up 10 slots max.
 #
@@ -49,23 +51,31 @@ class buttonEvent:
 #    print("button B pressed", buttonB)
     
 def ButtonB_f_IRQHandler(pin):
-    global last_pv, last_tt
+    global last_pv, last_tt, spurious, mindex
     pv = pin.value()
     tt  = time.ticks_ms()
-    print("button B IRQ", tt, pv)
+    #print("button B IRQ", tt, pv)
     if last_pv ==   pv  : # get get spurious 0 level ints
-        print("two   ints @ same level in a row",pv) # ignore
+        #print("two   ints @ same level in a row",pv) # ignore
+        spurious += 1
     else:
-        b=buttonEvent(time.ticks_ms(),pv)
+        #b=buttonEvent(time.ticks_ms(),pv)
         d = tt - last_tt
         if pv:
-            print(" duration of inter-m space ", d)
+            #print(" duration of inter-m space ", d)
+            if d < 600:
+                print (" ")
+            else:
+                print (" interval ")
+                mindex += 1;
             beeper.playTone(600)
         else:
-            print(" duration of press ", d)
+            #print(" duration of press ", d)
             if d > 300:
+                morse.append("-");
                 print ("DAH")
             else:
+                morse.append(".");
                 print ("DIT")
             beeper.stopTone()
     last_pv = pv
@@ -76,14 +86,33 @@ def ButtonB_f_IRQHandler(pin):
 buttons.buttonB.irq(trigger=machine.Pin.IRQ_FALLING|machine.Pin.IRQ_RISING, handler=ButtonB_f_IRQHandler)
 #buttons.buttonB.irq(trigger=machine.Pin.IRQ_RISING, handler=ButtonB_r_IRQHandler)
 
+def decode_morse():
+    global morse
+    dm_a = [".","-"]
+    dm_b = ["-",".",".","."]
+    dm_e = ["."]
+    dm_i = [".","."]
+    dm_s = [".",".","."]
+    if morse == dm_e:
+        print ("E")
+    if morse == dm_a:
+        print ("A")
+    if morse == dm_i:
+        print ("I")
+    if morse == dm_s:
+        print ("S")      
+        
         
         
 def process_morse():
-    #global mbuf # : why python WHY: why muck everyone about with local fucking copies your sxdjhklazsedfbokhjlfvbegrhjk
-    #global mbuf, mindex, mindex_t, mcount, mmaxindex, oled, old_m_count
-    #for i in range (0,mmaxindex-1):
-        #be = mbuf[i]
-        #print ("be ", be.timestampms, be.pinstate )
+    global last_tt, morse
+    tt  = time.ticks_ms()
+    if (tt - last_tt) > 600:
+        # morse chacter complete
+        if (len(morse) > 0):
+            print(morse)
+            decode_morse()
+            morse = []
     oled.clear()
     oled.displayText(rtc.readDateString(), 1, 25)
     oled.displayText(rtc.readTimeString(), 2, 33)