Shield Esp8266 Esp12e on Mega2560 : Failed to connect to ESP8266

Projects Networking, Protocols, and Devices
1

Hi guys! How are you doing? I assembled a Shield Esp8266 Esp12e on Arduino mega 2560 to control relays in the system. But the process to write generate a esptool.FatalError:

"esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header".

Serial port /dev/cu.usbmodem1101
Connecting........_____....._____....._____....._____....._____....._____.....____Traceback (most recent call last):
  File "/Users/caiosanchezchristino/Library/Arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/upload.py", line 66, in <module>
    esptool.main(cmdline)
  File "/Users/caiosanchezchristino/Library/Arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/esptool/esptool.py", line 3552, in main
    esp.connect(args.before, args.connect_attempts)
  File "/Users/caiosanchezchristino/Library/Arduino15/packages/esp8266/hardware/esp8266/3.0.2/tools/esptool/esptool.py", line 529, in connect
    raise FatalError('Failed to connect to %s: %s' % (self.CHIP_NAME, last_error))
esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header
esptool.FatalError: Failed to connect to ESP8266: Timed out waiting for packet header

and. That's my board system.

Unknown-6
Unknown-6780×1040 97.8 KB

I'm using MAC Monterey. Arduino IDE 1.8.19 and NodeMCU 1.0 (ESP-12E Module) from ESP8266 version 3.0.2

anyone already past for this problem and can help me?
Thanks!

2

difficult to see from you photo but did you follow Step 2: Firmware Upgrade on ESP8266 ESP-12E UART Wireless WIFI Shield TTL Converter for Arduino ESP8266-ESP-12E-UART-Wireless-WIFI-Shield
I would use USB-TTL serial converter to program the ESP8266, e.g. DIL switch positions

  1. to program down down up up
  2. to run program all down
3

As you stated correctly in the topic name, it failed to connect. chances are you need to flick some dip-switches to upload new firmware to the ESP. Check the manual of the shield.
In the next sketch try and set up OTA updates, that will save a lot of hassle.

4

Thanks for helping @horace and @Deva_Rishi
I believe that's an upgrade isn't solve the problem.. i think about dip-switches makes sense to me because if I keep the reset button of mega pressed, the build are started with success. But process to write exceed the 17s and reset me Mega board and the code aren't written.

@Deva_Rishi Are only available dip-switches on shield Esp selectors right? It's possible set a "jumper" the Mega 2560 too?

5

I assume you are attempting to program the device by connecting the shields EXTERNAL SERIAL USB ADAPTER CONNECTION to RX0 and TX0 of the UNO
the shield guide (referenced in post #2) states
NOTE: Before mounting the Arduino wiring diagram, you must load a blank code on the board to ensure that the serial USB converter is not being used.
did you do thst?
never attempted to program a shield this way - always used a USB-TTL converter

6

If i understood the tutorial in #2 correctly, to upload using the mega (or UNO as in the tutorial.)

  • first load a blank sketch (or blink) onto the mega.
  • and set dip 3 & 4 to 'ON' and reset the shield.
  • and connect the shields TX to mega TX and RX to RX.

It is a weird shield in my opinion, but like that it should work.

7

tend to agree - I have several of these shields but prfer using the NodeMCU ESP8266 being far easier to program and use