1 files changed, 8 insertions, 2 deletions

diff --git a/datalog.h b/datalog.h
index 39473e3..029ec61 100644
--- a/datalog.h
+++ b/datalog.h
@@ -21,8 +21,11 @@ public:
 
   void start() {
     SDSPI.begin(SDCARD_SCLK, SDCARD_MISO, SDCARD_MOSI);
-    SD.begin(SDCARD_CS, SDSPI);
+    bool sdok=SD.begin(SDCARD_CS, SDSPI);
+    Serial.print("sdok: ");Serial.println(sdok);
+    Serial.println(SD.cardSize());
     logfile = SD.open("air-quality.csv",FILE_APPEND,true);
+    Serial.print("file: ");Serial.println(logfile.path());
     linesSinceLastFlush=0;
   }
 
@@ -44,11 +47,14 @@ public:
 
             data->batteryVoltage
             );
-    logfile.write((uint8_t *)line,65);
+    size_t written=logfile.write((uint8_t *)line,65);
     Serial.write(line);
+    Serial.print("written: ");Serial.println(written);
     if (++linesSinceLastFlush > flushThreshold) {
       logfile.flush();
       linesSinceLastFlush=0;
+
+      Serial.println("flushed");
     }
   }
 };