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xiao-ble/ble-led-server needs additional permission

Looks like tinygo-org/bluetooth package does not support Characteristic.Write() on macos and linux. It only supports WriteWithoutResonse(). Need to add bluetooth.CharacteristicWriteWithoutResponsePermission in order for connections to xiao-ble ble-led-server.

diff --git a/xiao-ble/ble-led-server/main.go b/xiao-ble/ble-led-server/main.go
index dcb7897..0d78ecc 100644
--- a/xiao-ble/ble-led-server/main.go
+++ b/xiao-ble/ble-led-server/main.go
@@ -36,7 +36,7 @@ func main() {
                                Handle: &ledColorCharacteristic,
                                UUID:   charUUID,
                                Value:  ledColor[:],
-                               Flags:  bluetooth.CharacteristicReadPermission | bluetooth.CharacteristicWritePermission,
+                               Flags:  bluetooth.CharacteristicReadPermission | bluetooth.CharacteristicWritePermission | bluetooth.CharacteristicWriteWithoutResponsePermission,
                                WriteEvent: func(client bluetooth.Connection, offset int, value []byte) {
                                        if offset != 0 || len(value) != 4 {
                                                return

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