QUERY · ISSUE

no input for repl with dupterm

openby uraichopened 2020-05-10updated 2024-11-09

On my esp32 and the esp8266 port REPL does not seem to ask for input except for slot 0.
webrepl shows output but does not take input. Same if I try to use a second serial port. Same for utelnetserver. Is this a dupterm problem?
Working with the newest micropython commit v1.12-447-gab4e19770-dirty

CANDIDATE · ISSUE

esp8266: NodeMCU REPL not responding due to minicom flow control

closedby MoonshineSGopened 2017-06-20updated 2020-06-20

After a very uneventful setup of the latest esp8266-20170612-v1.9.1.bin firmware on a new NodeMCU I am stuck.
Using esptool.py v 2.0 on RaspberryPi, and minicom and after connection there is no prompt from MicroPython. A soft reset using the button, shows the screen below:

dÜ^^^Oòý#4 ets_task(40100164, 3, 3fff829c, 4)
OSError: [Errno 2] ENOENT

MicroPython v1.9.1-8-g7213e78d on 2017-06-12; ESP module with ESP8266
Type "help()" for more information.
>>>

(the funny characters in front are aways different...)

any user input has no response

Update:
v1.9.1-13-g1e70fda6 same results

Assessment

Q Qwen · medium

Both issues involve REPL input problems on ESP8266, but they have different root causes. Issue #6023 is specifically about dupterm (multiple terminal support) where input fails on all slots except slot 0, affecting both ESP32 and ESP8266. Issue #3154 is about flow control issues with minicom on ESP8266 causing garbled output and unresponsive REPL. While both deal with REPL input not working, the underlying mechanisms and affected components differ significantly. #6023 involves dupterm slot handling and multiple terminal interfaces, while #3154 involves UART flow control and serial communication initialization.

Suggested action

Keep both issues open as they address different problems. The maintainer may want to review if there's any overlap in the fix, but they appear to be distinct issues requiring separate solutions.

no input for repl with dupterm

esp8266: NodeMCU REPL not responding due to minicom flow control

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