From dceab074cad0a337af8aca97cbd338e729b0b8da Mon Sep 17 00:00:00 2001
From: cyberman54 <cyberman@obh.snafu.de>
Date: Sat, 6 Mar 2021 16:20:26 +0100
Subject: [PATCH] BT/WiFi coex fix needed for IDF4.1

---
 src/wifiscan.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/wifiscan.cpp b/src/wifiscan.cpp
index f57aab90..4e25d542 100644
--- a/src/wifiscan.cpp
+++ b/src/wifiscan.cpp
@@ -82,7 +82,12 @@ void wifi_sniffer_init(void) {
 
 void switch_wifi_sniffer(uint8_t state) {
   if (state) {
-    // start sniffer
+// start sniffer
+#if (BLECOUNTER)
+    // workaround needed for IDF 4.1
+    // see https://github.com/espressif/esp-idf/issues/5427
+    esp_wifi_set_ps(WIFI_PS_MIN_MODEM);
+#endif
     esp_wifi_start();
     esp_wifi_set_promiscuous(true);
     esp_wifi_set_channel(WIFI_CHANNEL_MIN, WIFI_SECOND_CHAN_NONE);