diff --git a/1.54inch_e-paper_b_code/RaspberryPi/python2/epd1in54b.py b/1.54inch_e-paper_b_code/RaspberryPi/python2/epd1in54b.py
index 5e19094..8c4f29b 100644
--- a/1.54inch_e-paper_b_code/RaspberryPi/python2/epd1in54b.py
+++ b/1.54inch_e-paper_b_code/RaspberryPi/python2/epd1in54b.py
@@ -153,7 +153,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/1.54inch_e-paper_b_code/RaspberryPi/python3/epd1in54b.py b/1.54inch_e-paper_b_code/RaspberryPi/python3/epd1in54b.py
index 521f5d3..200b214 100644
--- a/1.54inch_e-paper_b_code/RaspberryPi/python3/epd1in54b.py
+++ b/1.54inch_e-paper_b_code/RaspberryPi/python3/epd1in54b.py
@@ -153,7 +153,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/1.54inch_e-paper_c_code/RaspberryPi/python2/epd1in54c.py b/1.54inch_e-paper_c_code/RaspberryPi/python2/epd1in54c.py
index 60a49cc..e86f8df 100644
--- a/1.54inch_e-paper_c_code/RaspberryPi/python2/epd1in54c.py
+++ b/1.54inch_e-paper_c_code/RaspberryPi/python2/epd1in54c.py
@@ -111,7 +111,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/1.54inch_e-paper_c_code/RaspberryPi/python3/epd1in54c.py b/1.54inch_e-paper_c_code/RaspberryPi/python3/epd1in54c.py
index f905a4e..21e9f8a 100644
--- a/1.54inch_e-paper_c_code/RaspberryPi/python3/epd1in54c.py
+++ b/1.54inch_e-paper_c_code/RaspberryPi/python3/epd1in54c.py
@@ -111,7 +111,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/1.54inch_e-paper_code/RaspberryPi/python2/epd1in54.py b/1.54inch_e-paper_code/RaspberryPi/python2/epd1in54.py
index 60a49cc..e86f8df 100644
--- a/1.54inch_e-paper_code/RaspberryPi/python2/epd1in54.py
+++ b/1.54inch_e-paper_code/RaspberryPi/python2/epd1in54.py
@@ -111,7 +111,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/1.54inch_e-paper_code/RaspberryPi/python3/epd1in54.py b/1.54inch_e-paper_code/RaspberryPi/python3/epd1in54.py
index f905a4e..21e9f8a 100644
--- a/1.54inch_e-paper_code/RaspberryPi/python3/epd1in54.py
+++ b/1.54inch_e-paper_code/RaspberryPi/python3/epd1in54.py
@@ -111,7 +111,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.13inch_e-paper_b&c_code/RaspberryPi/python2/epd2in13b.py b/2.13inch_e-paper_b&c_code/RaspberryPi/python2/epd2in13b.py
index 4894cb8..676461f 100644
--- a/2.13inch_e-paper_b&c_code/RaspberryPi/python2/epd2in13b.py
+++ b/2.13inch_e-paper_b&c_code/RaspberryPi/python2/epd2in13b.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.13inch_e-paper_b&c_code/RaspberryPi/python3/epd2in13b.py b/2.13inch_e-paper_b&c_code/RaspberryPi/python3/epd2in13b.py
index 567472c..1e5b71b 100644
--- a/2.13inch_e-paper_b&c_code/RaspberryPi/python3/epd2in13b.py
+++ b/2.13inch_e-paper_b&c_code/RaspberryPi/python3/epd2in13b.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.13inch_e-paper_code/RaspberryPi/python2/epd2in13.py b/2.13inch_e-paper_code/RaspberryPi/python2/epd2in13.py
index dcb942c..26c4d0f 100644
--- a/2.13inch_e-paper_code/RaspberryPi/python2/epd2in13.py
+++ b/2.13inch_e-paper_code/RaspberryPi/python2/epd2in13.py
@@ -63,14 +63,12 @@ class EPD:
         
     # Hardware reset
     def reset(self):
-        epdconfig.digital_write(self.cs_pin, GPIO.LOW)
         epdconfig.digital_write(self.reset_pin, GPIO.HIGH)
         epdconfig.delay_ms(200) 
         epdconfig.digital_write(self.reset_pin, GPIO.LOW)         # module reset
         epdconfig.delay_ms(200)
         epdconfig.digital_write(self.reset_pin, GPIO.HIGH)
-        epdconfig.delay_ms(200)   
-        epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
+        epdconfig.delay_ms(200)
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
diff --git a/2.13inch_e-paper_d_code/RaspberryPi/python2/epd2in13d.py b/2.13inch_e-paper_d_code/RaspberryPi/python2/epd2in13d.py
index dc6a047..a7c75a9 100644
--- a/2.13inch_e-paper_d_code/RaspberryPi/python2/epd2in13d.py
+++ b/2.13inch_e-paper_d_code/RaspberryPi/python2/epd2in13d.py
@@ -176,7 +176,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.13inch_e-paper_d_code/RaspberryPi/python3/epd2in13d.py b/2.13inch_e-paper_d_code/RaspberryPi/python3/epd2in13d.py
index 6daa5cc..0248c3c 100644
--- a/2.13inch_e-paper_d_code/RaspberryPi/python3/epd2in13d.py
+++ b/2.13inch_e-paper_d_code/RaspberryPi/python3/epd2in13d.py
@@ -176,7 +176,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.7inch_e-paper_b_code/RaspberryPi/python2/epd2in7b.py b/2.7inch_e-paper_b_code/RaspberryPi/python2/epd2in7b.py
index 922f4e8..e9b053a 100644
--- a/2.7inch_e-paper_b_code/RaspberryPi/python2/epd2in7b.py
+++ b/2.7inch_e-paper_b_code/RaspberryPi/python2/epd2in7b.py
@@ -168,7 +168,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.7inch_e-paper_b_code/RaspberryPi/python3/epd2in7b.py b/2.7inch_e-paper_b_code/RaspberryPi/python3/epd2in7b.py
index fc0c5cf..76f8234 100644
--- a/2.7inch_e-paper_b_code/RaspberryPi/python3/epd2in7b.py
+++ b/2.7inch_e-paper_b_code/RaspberryPi/python3/epd2in7b.py
@@ -168,7 +168,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.7inch_e-paper_code/RaspberryPi/python2/epd2in7.py b/2.7inch_e-paper_code/RaspberryPi/python2/epd2in7.py
index 3039918..2e29bed 100644
--- a/2.7inch_e-paper_code/RaspberryPi/python2/epd2in7.py
+++ b/2.7inch_e-paper_code/RaspberryPi/python2/epd2in7.py
@@ -161,7 +161,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.7inch_e-paper_code/RaspberryPi/python3/epd2in7.py b/2.7inch_e-paper_code/RaspberryPi/python3/epd2in7.py
index 0d54714..5b784e9 100644
--- a/2.7inch_e-paper_code/RaspberryPi/python3/epd2in7.py
+++ b/2.7inch_e-paper_code/RaspberryPi/python3/epd2in7.py
@@ -161,7 +161,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.9inch_e-paper_b&c_code/RaspberryPi/python2/epd2in9b.py b/2.9inch_e-paper_b&c_code/RaspberryPi/python2/epd2in9b.py
index 7efc127..5303200 100644
--- a/2.9inch_e-paper_b&c_code/RaspberryPi/python2/epd2in9b.py
+++ b/2.9inch_e-paper_b&c_code/RaspberryPi/python2/epd2in9b.py
@@ -110,7 +110,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.9inch_e-paper_b&c_code/RaspberryPi/python3/epd2in9b.py b/2.9inch_e-paper_b&c_code/RaspberryPi/python3/epd2in9b.py
index 5402f6b..68dea03 100644
--- a/2.9inch_e-paper_b&c_code/RaspberryPi/python3/epd2in9b.py
+++ b/2.9inch_e-paper_b&c_code/RaspberryPi/python3/epd2in9b.py
@@ -110,7 +110,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.9inch_e-paper_code/RaspberryPi/python2/epd2in9.py b/2.9inch_e-paper_code/RaspberryPi/python2/epd2in9.py
index d7efad7..b6230d6 100644
--- a/2.9inch_e-paper_code/RaspberryPi/python2/epd2in9.py
+++ b/2.9inch_e-paper_code/RaspberryPi/python2/epd2in9.py
@@ -113,7 +113,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/2.9inch_e-paper_code/RaspberryPi/python3/epd2in9.py b/2.9inch_e-paper_code/RaspberryPi/python3/epd2in9.py
index f91914b..fa8ceb5 100644
--- a/2.9inch_e-paper_code/RaspberryPi/python3/epd2in9.py
+++ b/2.9inch_e-paper_code/RaspberryPi/python3/epd2in9.py
@@ -113,7 +113,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/4.2inch_e-paper_b&c_code/RaspberryPi/python2/epd4in2b.py b/4.2inch_e-paper_b&c_code/RaspberryPi/python2/epd4in2b.py
index a8097fd..f920438 100644
--- a/4.2inch_e-paper_b&c_code/RaspberryPi/python2/epd4in2b.py
+++ b/4.2inch_e-paper_b&c_code/RaspberryPi/python2/epd4in2b.py
@@ -116,7 +116,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/4.2inch_e-paper_b&c_code/RaspberryPi/python3/epd4in2b.py b/4.2inch_e-paper_b&c_code/RaspberryPi/python3/epd4in2b.py
index 2c80d1b..660a440 100644
--- a/4.2inch_e-paper_b&c_code/RaspberryPi/python3/epd4in2b.py
+++ b/4.2inch_e-paper_b&c_code/RaspberryPi/python3/epd4in2b.py
@@ -116,7 +116,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/4.2inch_e-paper_code/RaspberryPi/python2/epd4in2.py b/4.2inch_e-paper_code/RaspberryPi/python2/epd4in2.py
index 8116e4e..2374673 100644
--- a/4.2inch_e-paper_code/RaspberryPi/python2/epd4in2.py
+++ b/4.2inch_e-paper_code/RaspberryPi/python2/epd4in2.py
@@ -161,7 +161,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/4.2inch_e-paper_code/RaspberryPi/python3/epd4in2.py b/4.2inch_e-paper_code/RaspberryPi/python3/epd4in2.py
index 73cb99c..91749ba 100644
--- a/4.2inch_e-paper_code/RaspberryPi/python3/epd4in2.py
+++ b/4.2inch_e-paper_code/RaspberryPi/python3/epd4in2.py
@@ -161,7 +161,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/5.83inch_e-paper_b&c_code/RaspberryPi/python2/epd5in83b.py b/5.83inch_e-paper_b&c_code/RaspberryPi/python2/epd5in83b.py
index 4dc1b60..cfcf007 100644
--- a/5.83inch_e-paper_b&c_code/RaspberryPi/python2/epd5in83b.py
+++ b/5.83inch_e-paper_b&c_code/RaspberryPi/python2/epd5in83b.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/5.83inch_e-paper_b&c_code/RaspberryPi/python3/epd5in83b.py b/5.83inch_e-paper_b&c_code/RaspberryPi/python3/epd5in83b.py
index fdb51eb..3701a39 100644
--- a/5.83inch_e-paper_b&c_code/RaspberryPi/python3/epd5in83b.py
+++ b/5.83inch_e-paper_b&c_code/RaspberryPi/python3/epd5in83b.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/5.83inch_e-paper_code/RaspberryPi/python2/epd5in83.py b/5.83inch_e-paper_code/RaspberryPi/python2/epd5in83.py
index cc83870..1f36cbb 100644
--- a/5.83inch_e-paper_code/RaspberryPi/python2/epd5in83.py
+++ b/5.83inch_e-paper_code/RaspberryPi/python2/epd5in83.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/5.83inch_e-paper_code/RaspberryPi/python3/epd5in83.py b/5.83inch_e-paper_code/RaspberryPi/python3/epd5in83.py
index ab0ccda..fc4149c 100644
--- a/5.83inch_e-paper_code/RaspberryPi/python3/epd5in83.py
+++ b/5.83inch_e-paper_code/RaspberryPi/python3/epd5in83.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/7.5inch_e-paper_b&c_code/RaspberryPi/python2/epd7in5b.py b/7.5inch_e-paper_b&c_code/RaspberryPi/python2/epd7in5b.py
index 7d1633b..84dab13 100644
--- a/7.5inch_e-paper_b&c_code/RaspberryPi/python2/epd7in5b.py
+++ b/7.5inch_e-paper_b&c_code/RaspberryPi/python2/epd7in5b.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/7.5inch_e-paper_b&c_code/RaspberryPi/python3/epd7in5b.py b/7.5inch_e-paper_b&c_code/RaspberryPi/python3/epd7in5b.py
index aa149f1..094fdc6 100644
--- a/7.5inch_e-paper_b&c_code/RaspberryPi/python3/epd7in5b.py
+++ b/7.5inch_e-paper_b&c_code/RaspberryPi/python3/epd7in5b.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/7.5inch_e-paper_code/RaspberryPi/python2/epd7in5.py b/7.5inch_e-paper_code/RaspberryPi/python2/epd7in5.py
index a558da8..fd58f39 100644
--- a/7.5inch_e-paper_code/RaspberryPi/python2/epd7in5.py
+++ b/7.5inch_e-paper_code/RaspberryPi/python2/epd7in5.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)
 
diff --git a/7.5inch_e-paper_code/RaspberryPi/python3/epd7in5.py b/7.5inch_e-paper_code/RaspberryPi/python3/epd7in5.py
index fcfded2..ce0092b 100644
--- a/7.5inch_e-paper_code/RaspberryPi/python3/epd7in5.py
+++ b/7.5inch_e-paper_code/RaspberryPi/python3/epd7in5.py
@@ -115,7 +115,7 @@ class EPD:
 
     def send_command(self, command):
         epdconfig.digital_write(self.cs_pin, GPIO.LOW)
-        epdconfig.digital_write(self.dc_pin, GPIO.HIGH)
+        epdconfig.digital_write(self.dc_pin, GPIO.LOW)
         epdconfig.spi_writebyte([command])
         epdconfig.digital_write(self.cs_pin, GPIO.HIGH)