From 35d4a3c84bd5247be7fc3e377c39c7e0b4b249aa Mon Sep 17 00:00:00 2001
From: Martino Facchin <m.facchin@arduino.cc>
Date: Fri, 16 Nov 2018 16:53:52 +0100
Subject: [PATCH] Free BT memory if using only WiFi

Partially fixes https://github.com/arduino/nina-fw/issues/4.

Problem: default certificates are a lot (~70KB) and BT uses a lot of RAM even if just configured in menuconfig.
Avoid spurious certificates parsing and SSL errors by freeing bt memory if unused.
---
 main/sketch.ino.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/main/sketch.ino.cpp b/main/sketch.ino.cpp
index f4d98ce..17889f8 100644
--- a/main/sketch.ino.cpp
+++ b/main/sketch.ino.cpp
@@ -132,6 +132,7 @@ void setupBluetooth() {
 }
 
 void setupWiFi() {
+  esp_bt_controller_mem_release(ESP_BT_MODE_BTDM);
   SPIS.begin();
 
   if (WiFi.status() == WL_NO_SHIELD) {