diff --git a/version.txt b/version.txt
index 7f20734..e6d5cb8 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.1
\ No newline at end of file
+1.0.2
\ No newline at end of file
diff --git a/zh_1602a_i2c.c b/zh_1602a_i2c.c
index 0e5e66a..e304070 100644
--- a/zh_1602a_i2c.c
+++ b/zh_1602a_i2c.c
@@ -156,16 +156,16 @@ static void _zh_1602a_lcd_init(zh_pcf8574_handle_t *handle)
 
 static void _zh_1602a_send_command(zh_pcf8574_handle_t *handle, uint8_t command)
 {
-    zh_pcf8574_write(handle, (command & 0xF0));
+    zh_pcf8574_write(handle, (command & 0xF0) | 0x08);
     LCD_1602A_PULSE;
-    zh_pcf8574_write(handle, command << 4);
+    zh_pcf8574_write(handle, (command << 4) | 0x08);
     LCD_1602A_PULSE;
 }
 
 static void _zh_1602a_send_data(zh_pcf8574_handle_t *handle, uint8_t data)
 {
-    zh_pcf8574_write(handle, (data & 0xF0) | 0x01);
+    zh_pcf8574_write(handle, (data & 0xF0) | 0x09);
     LCD_1602A_PULSE;
-    zh_pcf8574_write(handle, (data << 4) | 0x01);
+    zh_pcf8574_write(handle, (data << 4) | 0x09);
     LCD_1602A_PULSE;
 }