DemoSendSwitchPress circuitPy code

arduinoCircuitPy.py

"""
This example acts as a BLE HID keyboard to peer devices.
Attach five buttons with pullup resistors to Feather nRF52840
  each button will send a configurable keycode to mobile device or computer
"""
import time
import board
from digitalio import DigitalInOut, Direction

import adafruit_ble
from adafruit_ble.advertising import Advertisement
from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
from adafruit_ble.services.standard.hid import HIDService
from adafruit_ble.services.standard.device_info import DeviceInfoService
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
from adafruit_hid.keycode import Keycode

hid = HIDService()

device_info = DeviceInfoService(software_revision=adafruit_ble.__version__,
                                manufacturer="Adafruit Industries")
advertisement = ProvideServicesAdvertisement(hid)
advertisement.appearance = 961
scan_response = Advertisement()
scan_response.complete_name = "CircuitPython HID"

ble = adafruit_ble.BLERadio()
if not ble.connected:
    print("advertising")
    ble.start_advertising(advertisement, scan_response)
else:
    print("already connected")
    print(ble.connections)

k = Keyboard(hid.devices)
kl = KeyboardLayoutUS(k)

uart = busio.UART(board.TX, board.RX, baudrate=9600)    
while True:
    while not ble.connected:
        pass
        
    while ble.connected:
		data = uart.read(32)  # read up to 32 bytes
		if data is not None:
			# convert bytearray to string
			data_string = ''.join([chr(b) for b in data])
			#print(data_string, end="")
			if data_string.startswith("AT+SendSwitchPress")
				k.send(Keycode.SPACE)
				time.sleep(0.1)

    ble.start_advertising(advertisement)

ServerPy.py

import os
import serial
from time import sleep
from sys import exit
import sys
import serial.tools.list_ports
import logging
import argparse


# Use AT+BAUDRATE=115200 but make sure hardware flow control CTS/RTS works
DEFAULT_BAUD = 115200
# BAUD = 9600
nrfVID = '239A'
nrfPID = '8029'
devName = 'NONE'
RETRY_TIMEOUT = 10
QUEUE_TIMEOUT = 3

def find_device_path(seldev):
    dev = None
	# Default names
	if (os.name == 'posix'):
		dev = '/dev/ttyUSB0' if seldev is None else seldev
	else:
		dev = 'COM6' if seldev is None else seldev
		# Look for Adafruit CP2104 break out board or Feather nRF52. Use the first
		# one found. Default is /dev/ttyUSB0 Or COM6 (Windows)
		# tty for Bluetooth device with baud
		# NB: Could be p.device with a suitable name we are looking for. Noticed some variation around this
	if seldev is None:
		for p in serial.tools.list_ports.comports():
			if "CP2104" in p.description:
				logging.debug('serial desc:' + str(p))
				dev = p.device
				break
			elif "nRF52" in p.description:
				logging.debug('serial desc:' + str(p))
				dev = p.device
				break
			elif nrfVID and nrfPID in p.hwid:
				logging.debug('serial desc:' + str(p))
				dev = p.device
				break
    return dev

def main():
	## If you know what COM port its on - pop it here as a string
	seldev=None
	devicepath = find_device_path(seldev)
	SerialCls = serial.Serial
	with SerialCls(devicepath, baud, rtscts=1) as ser:
		#So now we are connected to the Arduino.. 
		# This is where we do some logic and when ready we send the command to the board	
		# E.g.. detect earSwitch.. now send the command to the board	
		ser.write("AT+SendSwitchPress"+b"\r\n")
		ser.flushInput()	

if __name__ == '__main__':
    ret = main()
    exit(ret)