Add support to connect to a module via TCP & telnet server

[ghost]

Add a lua telnet server that can be run on the nodemcu device. The luatool.py was extended to offer exchangeable transports (serial and tcp) to support all features also via remote telnet sessions.

[4refr0nt]

Thanks for you work!
Please, increment version number and add change log

[ghost]

Hi Eku,

can you provide your telnet server code? Or try using the telnet server from this project and try again.

Regard
J

[eku]

I'm using the telnet server code from the luatool project.

[ghost]

Ok, I am puzzled.

1. Does the direct telnet list all files you got on the device like directly talking to it via serial port? Or does it also just stop after name:init.lua, size:468?

2. I may not matter, but Welcome to esp1 running NodeMCU! is not the default welcome message of the supplied telnet server code. Any other modifications?

3. you run the which nodemcu version? I tested with nodemcu_integer_0.9.6-dev_20150704.bin

[eku]

1. yes, it returns only one line. But the telnet session still responds to further Lua commands.
2. I changed the banner. That's all.
3. I'm using the dev branch of nodemcu, i.e. SDK 1.4, self compiled

[ghost]

can you publish the output of

• ./luatool/luatool.py --port /dev/your tty -l | hexdump -C
• ./luatool/luatool.py --ip 192.168.33.131 -l | hexdump -C
• echo "local l = file.list();for k,v in pairs(l) do print('name:'..k..', size:'..v)end" | nc -w 1 192.168.33.131 23 | hexdump -C

this might help me a little

[eku]

@shing19m : Please find the output at https://gist.github.com/eku/1b018e2f49e98a7b8ada

The udpatesrv.lua and sendfile.py from https://github.com/tjclement/esp-common work for me.

[ghost]

Hi,

esp-common's updatesrv.lua fails with line srv:on("receive", onReceive) because of method not supported. So i cannot verify this.

The only clue I got from your files, is that (as in the original code) my code waits for some '>' appear as prompt (either via serial port or socket). The serial port code just continues but the socket code hangs.

Sadly i cannot reproduce this with my setting here.

can you try the attached diff?

diff --git a/luatool/luatool.py b/luatool/luatool.py
index 41a01d3..2ce8ec6 100755
--- a/luatool/luatool.py
+++ b/luatool/luatool.py
@@ -144,7 +144,10 @@ class TcpSocketTransport(AbstractTransport):
             sys.stdout.write(" -> send without check")

     def read(self, length):
-        return self.socket.recv(length)
+        data = self.socket.recv(length)
+        if not data:
+            return ''
+        return data

     def close(self):
         self.socket.close()

And, sorry to say, I am a little clue less...

[eku]

esp-common's updatesrv.lua fails with line srv:on("receive", onReceive) because of method not supported. So i cannot verify this.

updatesrv.lua uses UDP which has a slighlty different NodeMCU API than TCP.

The latest SDK and NodeMCU dev branch requires a strict event driven programming as discussed in this NodeMCU issue. This would explain why I see only the first line of the output from the fsinfo test program.