diff --git a/cores/esp8266/Updater.cpp b/cores/esp8266/Updater.cpp
index b2e92978eb..d9d468765a 100644
--- a/cores/esp8266/Updater.cpp
+++ b/cores/esp8266/Updater.cpp
@@ -203,6 +203,11 @@ bool UpdaterClass::end(bool evenIfRemaining){
return false;
}
+ // Updating w/o any data is an error we detect here
+ if (!progress()) {
+ _setError(UPDATE_ERROR_NO_DATA);
+ }
+
if(hasError() || (!isFinished() && !evenIfRemaining)){
#ifdef DEBUG_UPDATER
DEBUG_UPDATER.printf_P(PSTR("premature end: res:%u, pos:%zu/%zu\n"), getError(), progress(), _size);
@@ -551,6 +556,8 @@ void UpdaterClass::printError(Print &out){
out.println(F("Bad Size Given"));
} else if(_error == UPDATE_ERROR_STREAM){
out.println(F("Stream Read Timeout"));
+ } else if(_error == UPDATE_ERROR_NO_DATA){
+ out.println(F("No data supplied"));
} else if(_error == UPDATE_ERROR_MD5){
out.printf_P(PSTR("MD5 Failed: expected:%s, calculated:%s\n"), _target_md5.c_str(), _md5.toString().c_str());
} else if(_error == UPDATE_ERROR_SIGN){
diff --git a/cores/esp8266/Updater.h b/cores/esp8266/Updater.h
index 30c4a0071f..14a4a3baa9 100644
--- a/cores/esp8266/Updater.h
+++ b/cores/esp8266/Updater.h
@@ -19,6 +19,7 @@
#define UPDATE_ERROR_MAGIC_BYTE (10)
#define UPDATE_ERROR_BOOTSTRAP (11)
#define UPDATE_ERROR_SIGN (12)
+#define UPDATE_ERROR_NO_DATA (13)
#define U_FLASH 0
#define U_FS 100
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