![Fatal esptool.py error occurred: Failed to connect to ESP8266: Timed out waiting for packet header_ - Avrdude, stk500, Bootloader issues - Arduino Forum Fatal esptool.py error occurred: Failed to connect to ESP8266: Timed out waiting for packet header_ - Avrdude, stk500, Bootloader issues - Arduino Forum](https://europe1.discourse-cdn.com/arduino/optimized/4X/c/4/9/c499fecaa4be0d29d0021bfa884ebedc69b4787a_2_690x388.jpeg)
Fatal esptool.py error occurred: Failed to connect to ESP8266: Timed out waiting for packet header_ - Avrdude, stk500, Bootloader issues - Arduino Forum
![Better support for using esptool as Python module (ESPTOOL-157) · Issue #208 · espressif/esptool · GitHub Better support for using esptool as Python module (ESPTOOL-157) · Issue #208 · espressif/esptool · GitHub](https://user-images.githubusercontent.com/624195/27151630-7232362c-514b-11e7-80e0-c647b350523a.png)
Better support for using esptool as Python module (ESPTOOL-157) · Issue #208 · espressif/esptool · GitHub
![micropython - esptool.py not recognized as internal or external command, operable program or batch file - Stack Overflow micropython - esptool.py not recognized as internal or external command, operable program or batch file - Stack Overflow](https://i.stack.imgur.com/X7JXb.png)