Minor comment edits

Author: anecdata

examples/gpio/esp32spi_gpio.py

@@ -28,7 +28,7 @@ def esp_init_pin_modes(din, dout):
     esp.set_pin_mode(din, 0x0)
 
     # ESP32 Digital Output (no output on pins 34-39)
-    esp.set_pin_mode(dout, 0x1)  # Red LED on ESP32 Feather and ESP32 Breakout
+    esp.set_pin_mode(dout, 0x1)
 
 def esp_status_text(n):
     text = 'WL_UNDEFINED'
@@ -54,7 +54,7 @@ def esp_status_text(n):
 M4_A_R_PIN = pulseio.PulseIn(board.A0, maxlen=64)  # PWM read from ESP_A_W_PIN
 M4_A_R_PIN.pause()
 
-# ESP32 R/W Pin assignments
+# ESP32 R/W Pin assignments & connections
 ESP_D_R_PIN = 12  # digital read from M4_D_W_PIN
 ESP_D_W_PIN = 13  # digital write to Red LED on Feather ESP32 and ESP32 Breakout
 # ESP32 Analog Input using ADC1

examples/gpio/gpio.md

@@ -31,7 +31,7 @@ As of NINA firmware version 1.5.0, the ESP32SPI library can be used to read digi
     # Adafruit ESP32 Airlift Bitsy Add-On†
     #                                                             G,  R,  B
 
-    # Avialable† ESP32SPI Digital Inputs with NINA FW >= 1.5.0
+    # Avialable ESP32SPI Digital Inputs with NINA FW >= 1.5.0
     #
     # Adafruit ESP32 Breakout
     # *,    2, 4,    12,  R,     15, 16, 17,     19, 21, 22,     25, 26, 27, 32,     34, 35, 36, 39
@@ -79,7 +79,7 @@ The Airlift Breakout has level-shifting on RX and GPIO0, so those could be digit
 
 The Airlift FeatherWing and Bitsy Add-On have no level-shifting since they're designed to be stacked onto their associated M4 microcontrollers, so theoretically RX, TX, and GPIO0 could be used as digital inputs, or as digital or analog (PWM) outputs. It's hard to find a use case for doing this when stacked since RX, TX, and GPIO0 will be connected to M4 GPIO pins.
 
-The Airlift [Metro / Arduino] Shield has level-shifting on RX and GPIO0, with stacking issues similar to the wings.
+The Airlift [Metro / Arduino] Shield has level-shifting on RX and GPIO0, with stacking issues similar to the FeatherWings.
 
 The RX, TX, and GPIO0 pins are used for updating the NINA firmware, and have specific behaviors immediately following reboot that need to be considered if reusing them as GPIO. On the Airlift FeatherWing and Bitsy Add-On, there are pads that need to be soldered to connect the pins. NINA does output messages to TX when connected, depending on the esp debug level set.