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ESPCOMM failures

Q&A Forum › Category: ESP8266 › ESPCOMM failures
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plwr1512 asked 6 years ago

I have the ESP8266 WiFi Module ESP-12E and have been trying to upload the sketch for the DS18B20 temp sensor without success.

I am using the Arduino IDE. The Dallas Temp sensor library is there as is the Onewire library. When I attempt to compile the sketch I receive the error message…

Sketch uses 315260 bytes (63%) of program storage space. Maximum is 499696 bytes.
Global variables use 28012 bytes (34%) of dynamic memory, leaving 53908 bytes for local variables. Maximum is 81920 bytes.
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed.

I have the SSID and Password entered correctly.

1 Answers
0 Vote Up Vote Down
Rui Santos Staff answered 6 years ago

Hello again,

  • Have you been able to upload previous examples successfully like the Blink sketch?
  • Are you using a bare ESP-12E chip or are you using an ESP8266 development board?

The “error: espcomm_open failed” means that your ESP8266 is not establishing a serial communication with your Arduino IDE and it fails to upload code.

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