Fixed nodemcu_gpio_lcd.py to match the up-to-date MicroPython API (Pi…

…n.low() and Pin.high() were removed in v1.4.6) (#16)

Looks good to me - Thanks

lcd/nodemcu_gpio_lcd.py

@@ -55,32 +55,32 @@ def __init__(self, rs_pin, enable_pin, d0_pin=None, d1_pin=None,
             self.d6_pin = d2_pin
             self.d7_pin = d3_pin
         self.rs_pin.init(Pin.OUT)
-        self.rs_pin.low()
+        self.rs_pin.value(0)
         if self.rw_pin:
             self.rw_pin.init(Pin.OUT)
-            self.rw_pin.low()
+            self.rw_pin.value(0)
         self.enable_pin.init(Pin.OUT)
-        self.enable_pin.low()
+        self.enable_pin.value(0)
         self.d4_pin.init(Pin.OUT)
         self.d5_pin.init(Pin.OUT)
         self.d6_pin.init(Pin.OUT)
         self.d7_pin.init(Pin.OUT)
-        self.d4_pin.low()
-        self.d5_pin.low()
-        self.d6_pin.low()
-        self.d7_pin.low()
+        self.d4_pin.value(0)
+        self.d5_pin.value(0)
+        self.d6_pin.value(0)
+        self.d7_pin.value(0)
         if not self._4bit:
             self.d0_pin.init(Pin.OUT)
             self.d1_pin.init(Pin.OUT)
             self.d2_pin.init(Pin.OUT)
             self.d3_pin.init(Pin.OUT)
-            self.d0_pin.low()
-            self.d1_pin.low()
-            self.d2_pin.low()
-            self.d3_pin.low()
+            self.d0_pin.value(0)
+            self.d1_pin.value(0)
+            self.d2_pin.value(0)
+            self.d3_pin.value(0)
         if self.backlight_pin is not None:
             self.backlight_pin.init(Pin.OUT)
-            self.backlight_pin.low()
+            self.backlight_pin.value(0)
 
         # See about splitting this into begin
 
@@ -104,11 +104,11 @@ def __init__(self, rs_pin, enable_pin, d0_pin=None, d1_pin=None,
 
     def hal_pulse_enable(self):
         """Pulse the enable line high, and then low again."""
-        self.enable_pin.low()
+        self.enable_pin.value(0)
         sleep_us(1)
-        self.enable_pin.high()
+        self.enable_pin.value(1)
         sleep_us(1)       # Enable pulse needs to be > 450 nsec
-        self.enable_pin.low()
+        self.enable_pin.value(0)
         sleep_us(100)     # Commands need > 37us to settle
 
     def hal_write_init_nibble(self, nibble):
@@ -121,19 +121,19 @@ def hal_write_init_nibble(self, nibble):
     def hal_backlight_on(self):
         """Allows the hal layer to turn the backlight on."""
         if self.backlight_pin:
-            self.backlight_pin.high()
+            self.backlight_pin.value(1)
 
     def hal_backlight_off(self):
         """Allows the hal layer to turn the backlight off."""
         if self.backlight_pin:
-            self.backlight_pin.low()
+            self.backlight_pin.value(0)
 
     def hal_write_command(self, cmd):
         """Writes a command to the LCD.
 
         Data is latched on the falling edge of E.
         """
-        self.rs_pin.low()
+        self.rs_pin.value(0)
         self.hal_write_8bits(cmd)
         if cmd <= 3:
             # The home and clear commands require a worst
@@ -142,13 +142,13 @@ def hal_write_command(self, cmd):
 
     def hal_write_data(self, data):
         """Write data to the LCD."""
-        self.rs_pin.high()
+        self.rs_pin.value(1)
         self.hal_write_8bits(data)
 
     def hal_write_8bits(self, value):
         """Writes 8 bits of data to the LCD."""
         if self.rw_pin:
-            self.rw_pin.low()
+            self.rw_pin.value(0)
         if self._4bit:
             self.hal_write_4bits(value >> 4)
             self.hal_write_4bits(value)