ArduinoOTA upload intermittent failure fixed (espressif#4657)

* OTA upload often fails when client.read() return -1 and we subsequently try to write 4 gigabytes to flash. Fixed by signed comparison and retry. * Delay of 1ms already solves the issue * Update libraries/ArduinoOTA/src/ArduinoOTA.cpp Co-authored-by: Jan Procházka <90197375+P-R-O-C-H-Y@users.noreply.github.com> --------- Co-authored-by: Leif <git@leif.lc> Co-authored-by: Lucas Saavedra Vaz <32426024+lucasssvaz@users.noreply.github.com> Co-authored-by: Jan Procházka <90197375+P-R-O-C-H-Y@users.noreply.github.com>

Author: 4 people

libraries/ArduinoOTA/src/ArduinoOTA.cpp

@@ -315,6 +315,10 @@ void ArduinoOTAClass::_runUpdate() {
  size_t r = client.read(buf, available);
  if(r != available){
  log_w("didn't read enough! %u != %u", r, available);
+ if((int32_t) r<0) {
+ delay(1);
+ continue; //let's not try to write 4 gigabytes when client.read returns -1
+ }
  }
 
  written = Update.write(buf, r);