From 99c94bb4829467ab3c4b20c03868a43b8a1fa317 Mon Sep 17 00:00:00 2001
From: lbernstone <lbernstone@gmail.com>
Date: Thu, 1 Oct 2020 06:31:16 -0600
Subject: [PATCH] Set SD state to idle before unregister (reduces power)
 (#4272)

---
 libraries/SD/src/sd_diskio.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libraries/SD/src/sd_diskio.cpp b/libraries/SD/src/sd_diskio.cpp
index 0a9c86cc..fea10fcb 100644
--- a/libraries/SD/src/sd_diskio.cpp
+++ b/libraries/SD/src/sd_diskio.cpp
@@ -648,6 +648,7 @@ uint8_t sdcard_uninit(uint8_t pdrv)
     if (pdrv >= FF_VOLUMES || card == NULL) {
         return 1;
     }
+    sdTransaction(pdrv, GO_IDLE_STATE, 0, NULL);
     ff_diskio_register(pdrv, NULL);
     s_cards[pdrv] = NULL;
     esp_err_t err = ESP_OK;