Added basic BLE implementation using Adafruit libs

kmk/hid.py

@@ -1,5 +1,10 @@
 import usb_hid
 
+from adafruit_ble import BLERadio
+from adafruit_ble.advertising import Advertisement
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble.services.standard.hid import HIDService
+
 from kmk.keys import FIRST_KMK_INTERNAL_KEY, ConsumerKey, ModifierKey
 
 
@@ -224,7 +229,51 @@ class USBHID(AbstractHID):
 
 
 class BLEHID(AbstractHID):
-    def __init__(self, *args, **kwargs):
-        raise NotImplementedError(
-            'BLE HID is not supported by upstream CircuitPython yet'
+    def post_init(self):
+        self.devices = {}
+
+        hid = HIDService()
+ 
+        advertisement = ProvideServicesAdvertisement(hid)
+        advertisement.appearance = 961
+        scan_response = Advertisement()
+        scan_response.complete_name = "KMK Keyboard"
+        
+        ble = BLERadio()
+        if not ble.connected:
+            ble.start_advertising(advertisement, scan_response)
+            while not ble.connected:
+                pass
+
+        for device in hid.devices:
+            us = device.usage
+            up = device.usage_page
+
+            if up == HIDUsagePage.CONSUMER and us == HIDUsage.CONSUMER:
+                self.devices[HIDReportTypes.CONSUMER] = device
+                continue
+
+            if up == HIDUsagePage.KEYBOARD and us == HIDUsage.KEYBOARD:
+                self.devices[HIDReportTypes.KEYBOARD] = device
+                continue
+
+            if up == HIDUsagePage.MOUSE and us == HIDUsage.MOUSE:
+                self.devices[HIDReportTypes.MOUSE] = device
+                continue
+
+            if up == HIDUsagePage.SYSCONTROL and us == HIDUsage.SYSCONTROL:
+                self.devices[HIDReportTypes.SYSCONTROL] = device
+                continue
+
+    def hid_send(self, evt):
+        # int, can be looked up in HIDReportTypes
+        reporting_device_const = self.report_device[0]
+
+        report_size = HID_REPORT_SIZES[reporting_device_const]
+
+        while (len(evt) < report_size + 1):
+            evt.append(0)
+        
+        return self.devices[reporting_device_const].send_report(
+            evt[1 : report_size + 1]
         )