From 0292adfbc498ac7391acef37eb35b291a35bf238 Mon Sep 17 00:00:00 2001
From: David Antliff <david@pitchblende.co.nz>
Date: Wed, 18 Mar 2020 19:37:17 +1300
Subject: [PATCH] Update esp32-owb component to resolve owb_verify_rom blocking
 when no devices are connected.

---
 components/esp32-owb | 2 +-
 main/app_main.c      | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/components/esp32-owb b/components/esp32-owb
index de012fd..af25dd3 160000
--- a/components/esp32-owb
+++ b/components/esp32-owb
@@ -1 +1 @@
-Subproject commit de012fd1deeb9aff194bc8e32e1dee725258c022
+Subproject commit af25dd31dbb1e80364b99fad29815badfab0ceda
diff --git a/main/app_main.c b/main/app_main.c
index a15ee6a..eb13214 100644
--- a/main/app_main.c
+++ b/main/app_main.c
@@ -45,6 +45,7 @@ void app_main()
 
     // To debug OWB, use 'make menuconfig' to set default Log level to DEBUG, then uncomment:
     //esp_log_level_set("owb", ESP_LOG_DEBUG);
+    //esp_log_level_set("ds18b20", ESP_LOG_DEBUG);
 
     // Stable readings require a brief period before communication
     vTaskDelay(2000.0 / portTICK_PERIOD_MS);
@@ -191,6 +192,10 @@ void app_main()
             vTaskDelayUntil(&last_wake_time, SAMPLE_PERIOD / portTICK_PERIOD_MS);
         }
     }
+    else
+    {
+        printf("\nNo DS18B20 devices detected!\n");
+    }
 
     // clean up dynamically allocated data
     for (int i = 0; i < num_devices; ++i)