Fix bug that sets pin 10 to INPUT on WiFi boards

netConnectionState being initialized to NetworkConnectionState::DISCONNECTED caused the WiFiNINA library's SpiDrv::end() to be called before SpiDrv::begin(). Since SLAVESELECT is initialized to 10, and only assigned SPIWIFI_SS in SpiDrv::begin(), this causes pin 10 to be set to INPUT. Since pin 10 is MISO on the MKR boards, and often used as CS on the Nano 33 IoT, and WiFiConnectionHandler::update() is typically called from loop(), after SPI has already been configured, this breaks communication on SPI.

Author: per1234

src/Arduino_ConnectionHandler.h

@@ -162,7 +162,7 @@ class ConnectionHandler {
                             _on_error_event_callback = NULL;
 
     unsigned long lastValidTimestamp = 0;   /*  UNUSED  */
-    NetworkConnectionState netConnectionState = NetworkConnectionState::DISCONNECTED;
+    NetworkConnectionState netConnectionState = NetworkConnectionState::INIT;
 
     static void execNetworkEventCallback(OnNetworkEventCallback & callback, void * callback_arg);