using HTERM with RP2040

[GoRo]

My favorite terminal program on both Linux and Win is Hterm for several years now. But for any reason, it does not connect to an Arduino Nano RP2040 Connect module.

Thonny on Linux works well and also Putty on Win works, but I can't get Hterm to display any incoming data on neither Linux Mint 20.3 nor Win10.

Any idea? Maybe something very simple?

[jcf]

With Gtkterm I have no problem to connect and have a REPL (ttyACM0, 115200 baud).
Ctrl-B switches ro the normal REPL >>>

With hterm, no reaction.
I tried sending the control characters, but I am not familiar with hterm, maybe I didn't do it right.
Can you tell me how to send Ctrl-A, Ctrl-B, Ctrl-C, Ctrl-D ?

I did all this under Linux Mint.

[GoRo]

Data, Hterm should send, are put into the "input control" window. You can choose ASCII (just type a text), Hex (type '0d' for carriage return e. g.), decimal, etc.

When pressing enter, the data is sent as a block. That makes it possible to test e. g. Modbus.

I tried to connect to ttyACM0, Hterm seemed to be connected but didn't receive any characters (my Nano connect sends IMU data automatically).

[scruss]

I couldn't get it to do anything at all. Doesn't seem able to receive anything from the serial port on my Linux box

[jcf]

I got it to receive data from ttyUSB0, 9600baud.
But I could not communicate with the Pico via ttyACM0.
(Linux Mint)

[jcf]

Accidentally I noticed something:
hterm was active.
I started Thonny and tried to connect. No connection.
Then I noticed the reason why: hterm was connected.
In the hterm window I saw the result of Thonny's connection tries:

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>OK\r\nMPY: soft reboot ...

So the problem lies not on the receiving, but on the sending side of hterm!

[GoRo]

yes, seems Thonny and Hterm can both connect to the RPi Pico (tried with that board this time) at /dev/ttyACM0 at the same time. Of couse, it does not work...

HTerm:

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 /'</thonny>   > 

Thonny:

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<thonny>'
Crash in backend
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/connection.py", line 35, in read
    self._read_buffer.extend(self._read_queue.get(True, timer.time_left))
  File "/usr/lib/python3.8/queue.py", line 178, in get
    raise Empty
_queue.Empty

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 103, in __init__
    self._prepare(clean)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 118, in _prepare
    self._cwd = self._fetch_cwd()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 207, in _fetch_cwd
    return self._evaluate(
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 469, in _evaluate
    _, _, value_repr = self._execute_print_expr(expr, prelude, cleanup)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 466, in _execute_print_expr
    return self._execute(script, capture_output)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 441, in _execute
    return self._process_until_raw_prompt(capture_output)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 532, in _process_until_raw_prompt
    self._check_for_side_commands()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 635, in _check_for_side_commands
    self._submit_input(cmd.data)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 389, in _submit_input
    echo = self._connection.read(len(bdata))
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/connection.py", line 37, in read
    raise TimeoutError("Reaction timeout. Bytes read: %s" % self._read_buffer)
TimeoutError: Reaction timeout. Bytes read: bytearray(b'')
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/connection.py", line 35, in read
    self._read_buffer.extend(self._read_queue.get(True, timer.time_left))
  File "/usr/lib/python3.8/queue.py", line 178, in get
    raise Empty
_queue.Empty

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 103, in __init__
    self._prepare(clean)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 118, in _prepare
    self._cwd = self._fetch_cwd()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 207, in _fetch_cwd
    return self._evaluate(
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 469, in _evaluate
    _, _, value_repr = self._execute_print_expr(expr, prelude, cleanup)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 466, in _execute_print_expr
    return self._execute(script, capture_output)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 441, in _execute
    return self._process_until_raw_prompt(capture_output)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 532, in _process_until_raw_prompt
    self._check_for_side_commands()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 635, in _check_for_side_commands
    self._submit_input(cmd.data)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 389, in _submit_input
    echo = self._connection.read(len(bdata))
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/connection.py", line 37, in read
    raise TimeoutError("Reaction timeout. Bytes read: %s" % self._read_buffer)
TimeoutError: Reaction timeout. Bytes read: bytearray(b'')

Backend terminated or disconnected. Use 'Stop/Restart' to restart.
 

[GoRo]

another try:

Hterm:

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aw REPL; Ctrl-B to exit \r\n

Thonny:

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Crash in backend
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 103, in __init__
    self._prepare(clean)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 120, in _prepare
    self._builtin_modules = self._fetch_builtin_modules()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 173, in _fetch_builtin_modules
    out, err, _ = self._execute("help('modules')", capture_output=True)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 431, in _execute
    self._ensure_raw_propmt()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 428, in _ensure_raw_propmt
    raise TimeoutError("Could not ensure raw prompt")
TimeoutError: Could not ensure raw prompt
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 103, in __init__
    self._prepare(clean)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 120, in _prepare
    self._builtin_modules = self._fetch_builtin_modules()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 173, in _fetch_builtin_modules
    out, err, _ = self._execute("help('modules')", capture_output=True)
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 431, in _execute
    self._ensure_raw_propmt()
  File "/usr/lib/python3/dist-packages/thonny/plugins/micropython/backend.py", line 428, in _ensure_raw_propmt
    raise TimeoutError("Could not ensure raw prompt")
TimeoutError: Could not ensure raw prompt

Backend terminated or disconnected. Use 'Stop/Restart' to restart.

Clicking Stop @ Thonny brings this message:

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Connection lost (read failed: device reports readiness to read but returned no data (device disconnected or multiple access on port?))

Use Stop/Restart to reconnect.

(message in Hterm keeps the same)

Thonny has the right idea, but I don't know how to solve that

[jcf]

If you can send Ctrl-A, Ctrl-B, Ctrl-C, Ctrl-D you can do the important things.
How is it done in HTERM? I tried, but I had no reaction.

[GoRo]

So did I - having no reaction as well.

Hterm:
- check "Hex" in "input control" window
- enter 01 (e. g. for Ctrl-A)
- press enter key