Slow serial baudrates cause exceptions / WDT · Issue #7746 · esp8266/Arduino (original) (raw)

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Description

Basic Infos

• This issue complies with the issue POLICY doc.
• I have read the documentation at readthedocs and the issue is not addressed there.
• I have tested that the issue is present in current master branch (aka latest git).
• I have searched the issue tracker for a similar issue.
• If there is a stack dump, I have decoded it.
• I have filled out all fields below.

Platform

• Hardware: [ESP-12]
• Core Version: [framework-arduinoespressif8266 2.7.4]
• Development Env: [Platformio]
• Operating System: [Windows]

Settings in IDE

• Module: [WeMos D1 R2 and mini]
• Flash Mode: [dio]
• Flash Size: [4MB]
• lwip Variant: [v1.4|v2 Lower Memory|Higher Bandwidth]
• Reset Method: [clk]
• Flash Frequency: [40Mhz]
• CPU Frequency: [80Mhz]
• Upload Using: [SERIAL]
• Upload Speed: [115200] (serial upload only)
• PlatformIO - ini file:

[env:d1_mini] platform = espressif8266 board = d1_mini framework = arduino board_build.filesystem = littlefs

; COM1 or COM3 upload_port = COM[4] upload_speed = 115200

monitor_port = COM[4] monitor_speed = 115200 monitor_flags= --parity N

Problem Description

I want to use LittleFS to save some data coming from serial port at baudrate 110, N81
I tested the provided example in:
https://github.com/esp8266/Arduino/tree/master/libraries/LittleFS/examples/LittleFS_Timestamp
and it works fine at baudrate 115200
but when changing baudrate to 110, the code seems to retart (exception)

I need to have a running FS at baudrate of 110, because I can not change the baudrate of the device I am connected to.

Sketch

https://github.com/esp8266/Arduino/blob/master/libraries/LittleFS/examples/LittleFS_Timestamp/LittleFS_Timestamp.ino

Debug Messages

@ Baudrate 110

@baudrate 115200