diff --git a/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py b/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py
index 20f1665..de3d3a2 100644
--- a/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py
+++ b/RaspberryPi&JetsonNano/python/lib/waveshare_epd/epd2in7.py
@@ -172,7 +172,7 @@ class EPD:
         
     def ReadBusy(self):        
         logging.debug("e-Paper busy")
-        while(epdconfig.digital_read(self.busy_pin) == 0):      #  0: idle, 1: busy
+        while(epdconfig.digital_read(self.busy_pin) == 1):      #  0: idle, 1: busy
             epdconfig.delay_ms(200)                
         logging.debug("e-Paper busy release")