Difference: InternetAccess (8 vs. 9)

Revision 92020-06-13 - UliRaich

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Internet access

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When collecting data it may be interesting to transfer them for analysis to a PC. For this an FTP server is very helpful and there is one included in the MicroPython binary. Make sure you are connected to the network with wifi_connect and then simply
import uftpd. You may stop the server again with uftpd.stop().

More information about the ftp server can be found at https://github.com/robert-hh/FTP-Server-for-ESP8266-ESP32-and-PYBD

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Telnet

A simple telnet server is included in the MicroPython binary. To start it:

import utelnetserver
utelnetserver.start()

Once started you can telnet to the ESP32 and connect to its REPL.

Attention: This does NOT work when running the shell in thonny!

Here is an example:

On the left you have a minicom window connected to the ESP32 REPL through the serial line. On the right you have a window on the PC where I connect to the ESP32 REPL through telnet over the network.

Exercises for the Internet part of the IoT course

In this course we will have a look into two ways of accessing our data:

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META FILEATTACHMENT	attachment="wifi_connect.jpg" attr="" comment="" date="1591258916" name="wifi_connect.jpg" path="wifi_connect.jpg" size="107973" user="UliRaich" version="1"
META FILEATTACHMENT	attachment="hostname.png" attr="" comment="" date="1591819343" name="hostname.png" path="hostname.png" size="22500" user="UliRaich" version="1"

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META FILEATTACHMENT	attachment="utelnetserver.png" attr="" comment="" date="1592031058" name="utelnetserver.png" path="utelnetserver.png" size="102923" user="UliRaich" version="1"

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