Support HW serial in v5, clean up config

platformio.ini

@@ -20,6 +20,12 @@ lib_deps =
 	waspinator/AccelStepper@^1.61
 lib_ldf_mode = chain
 
+[env:uno]
+platform = atmelavr
+board = uno
+build_flags = -D MCU_UNO
+
+
 [env:nano]
 platform = atmelavr
 board = nanoatmega328new
@@ -42,14 +48,14 @@ platform = ststm32
 board = bluepill_f103c8
 upload_protocol = stlink
 build_flags =
-  -D MCU_BLUEPILL
-  -D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
-  -D USBCON
-  -D USBD_VID=0x0483
-  -D USBD_PID=0x5740
-  -D USB_MANUFACTURER="Unknown"
-  -D USB_PRODUCT="\"BLUEPILL_F103C8\""
-  -D HAL_PCD_MODULE_ENABLED
+	-D MCU_BLUEPILL
+	-D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
+	-D USBCON
+	-D USBD_VID=0x0483
+	-D USBD_PID=0x5740
+	-D USB_MANUFACTURER="Unknown"
+	-D USB_PRODUCT="\"BLUEPILL_F103C8\""
+	-D HAL_PCD_MODULE_ENABLED
 
 [env:esp32]
 platform = espressif32