Copy editing and UART clarification.

Author: HamishPoole

05_drivers_gpio_uart/README.md

@@ -81,6 +81,7 @@ $ DEV_SERIAL=/dev/tty.usbserial-0001 make miniterm
 
 7. Connect the USB serial to your host PC.
     - Wiring diagram at [top-level README](../README.md#-usb-serial-output).
+    - \## <u>**NOTE**</u> ## TX (transmit) wire connects to the RX (receive) pin.
     - Make sure that you **DID NOT** connect the power pin of the USB serial. Only RX/TX and GND.
 8. Connect the RPi to the (USB) power cable and observe the output:
 

common/serial/minipush.rb

@@ -82,7 +82,7 @@ def send_payload
 
     # override
     def handle_reconnect(_error)
-        connetion_reset
+        connection_reset
 
         puts
         puts "[#{@name_short}] ⚡ " \
@@ -107,7 +107,7 @@ def run
     rescue StandardError => e
         handle_unexpected(e)
     ensure
-        connetion_reset
+        connection_reset
         puts
         puts "[#{@name_short}] Bye 👋"
     end

common/serial/miniterm.rb

@@ -88,22 +88,22 @@ def terminal
         end
     end
 
-    def connetion_reset
+    def connection_reset
         @target_serial&.close
         @target_serial = nil
         @host_console.cooked!
     end
 
     # When the serial lost power or was removed during R/W operation.
     def handle_reconnect(_error)
-        connetion_reset
+        connection_reset
 
         puts
         puts "[#{@name_short}] ⚡ #{'Connection Error: Reinsert the USB serial again'.light_red}"
     end
 
     def handle_unexpected(error)
-        connetion_reset
+        connection_reset
 
         puts
         puts "[#{@name_short}] ⚡ #{"Unexpected Error: #{error.inspect}".light_red}"
@@ -120,7 +120,7 @@ def run
     rescue StandardError => e
         handle_unexpected(e)
     ensure
-        connetion_reset
+        connection_reset
         puts
         puts "[#{@name_short}] Bye 👋"
     end