A fatal error occurred: Failed to connect to ESP8266: Timed out waiting for packet header *** [upload] Error 2

[backspacestud]

On one of my fully assembled trackers, when i upload the firmware it spits out this error
`Using manually specified: /dev/ttyS0
Uploading .pio/build/esp12e/firmware.bin
esptool.py v3.0
Serial port /dev/ttyS0
Connecting......................................_____

A fatal error occurred: Failed to connect to ESP8266: Timed out waiting for packet header
*** [upload] Error 2`

On a board without anything attached, it works.

For some reason the one with battery power shows up on the port "/dev/ttyS0" but on the one with nothing on it it shows up on "Serial port /dev/ttyUSB0". Could this be a power issue? should i upload the firmware before connecting the battery?

[unlogisch04]

I need more info to help. Thats more like a HW / Wiring problem, than a Firmware Problem.

You need to provide more Infos.
Board your using
MCU your Using
Define.h (Pins your using)
Make sure there are no connections to GPIO0(D3) (if that is pulled high you can not flash) https://randomnerdtutorials.com/esp8266-pinout-reference-gpios/

[backspacestud]

Thank you for responding and sorry for the late response,

Board used: TP4056 USB C Charging board (https://www.aliexpress.us/item/2251832463465716.html?spm=a2g0o.order_list.order_list_main.35.21ef1802u5KKsC&gatewayAdapt=glo2usa&_randl_shipto=US)
MCU used: Wemos D1 Mini 4.0.0 (https://www.wemos.cc/en/latest/d1/d1_mini.html)
Define.h:
`#define IMU IMU_BMI160
#define SECOND_IMU IMU
#define BOARD BOARD_WEMOSD1MINI
#define IMU_ROTATION DEG_270
#define SECOND_IMU_ROTATION DEG_270

// Battery monitoring options (comment to disable):
// BAT_EXTERNAL for ADC pin, BAT_INTERNAL for internal - can detect only low battery, BAT_MCP3021 for external ADC
#define BATTERY_MONITOR BAT_EXTERNAL
#define BATTERY_SHIELD_RESISTANCE 180 //130k BatteryShield, 180k SlimeVR or fill in external resistor value in kOhm

#define PIN_IMU_SDA D2
#define PIN_IMU_SCL D1
#define PIN_IMU_INT D5
#define PIN_IMU_INT_2 D6
#define PIN_BATTERY_LEVEL A0`

I tried to follow the guide but as i am new to MCUs/Soldering in general I may have messed up somewhere. This is a diagram i tried to make because talking a photo of my rats nest of a tracker would have been too hard to understand. If there is anything I am leaving out I will do my best to provide more.

Thank you!

[unlogisch04]

Make sure that there is no connection from pin 4 to pin 0. Pin 4 is pulled HIGH, but pin 0 need to be at GND for flashing (this happens over RTS/DTR lines on the D1 mini).

Also check 5 to RX.

Im not sure why your tracker makes different types of USB devices.

[backspacestud]

I have tried many different things and I don't think its the wiring, i think it has something to do with my linux install? not exactly sure so I tried to install it on windows and now im getting a new error, and since i have no background in VSCode I have no idea what it is asking for or how to fix it.

Whenever I try to build it Spits out the error
Transition by adding must_exist=False to SConscript calls. LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf Missing SConscript 'C:\Users\USER\.platformio\packages\framework-arduinoespressif8266\tools\platformio-build.py' LDF Modes: Finder ~ chain, Compatibility ~ soft File "C:\Users\USER\.platformio\platforms\espressif8266\builder\frameworks\arduino.py", line 31, in <module>

I tried looking it up and could not understand anything... Any help would be appreciated as I am running out of ideas.

[backspacestud]

[{
"resource": "/C:/Users/USER/.platformio/platforms/espressif8266/builder/frameworks/arduino.py",
"owner": "generated_diagnostic_collection_name#2",
"code": {
"value": "reportMissingImports",
"target": {
"$mid": 1,
"external": "https://github.com/microsoft/pyright/blob/main/docs/configuration.md#reportMissingImports",
"path": "/microsoft/pyright/blob/main/docs/configuration.md",
"scheme": "https",
"authority": "github.com",
"fragment": "reportMissingImports"
}
},
"severity": 4,
"message": "Import "SCons.Script" could not be resolved",
"source": "Pylance",
"startLineNumber": 27,
"startColumn": 6,
"endLineNumber": 27,
"endColumn": 18
}]