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72 lines
2.8 KiB
Markdown
72 lines
2.8 KiB
Markdown
---
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title: "FTP & Telnet"
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aliases:
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- gettingstarted/programming/ftp.html
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- gettingstarted/programming/ftp.md
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- chapter/gettingstarted/programming/ftp
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---
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This page discusses the possibility to upload files through the internal FTP server and access the REPL through a Telnet connection. Using this method as the single option to connect to the device is not advisable, as unexpected crashes and changes in the wifi settings might lock you out.
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There is a small internal file system accessible with each Pycom device, called `/flash`. This is stored within the external serial flash memory. If a microSD card is also connected and mounted, it will be available as well. When the device starts up, it will always boot from the `boot.py` located in the `/flash` file system.
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By default, the device will create a WiFi access point with the following credentials:
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* SSID: `xxpy-wlan-####`
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* Password: `www.pycom.io`
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If you made changes to the WiFi settings, the AP might not show up by default. You can use the following to get it back up and running:
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```python
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import pycom
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from network import WLAN
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pycom.wifi_on_boot(True)
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pycom.wifi_mode_on_boot(WLAN.AP)
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```
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The last 4 characters of the broadcast SSID are equal to the last 4 characters of the `unique_id()`:
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```python
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import machine
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import ubinascii
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ubinascii.hexlify(machine.unique_id())
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```
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> You can find the methods to change the default settings [here](/firmwareapi/pycom/pycom/#boot-methods)
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The file system is accessible via the native FTP server running on each Pycom device. Open a FTP client and connect to:
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* url: `ftp://192.168.4.1`
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* username: `micro`
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* password: `python`
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See [network.server](/firmwareapi/pycom/network/server/) for information on how to change the default credentials.
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The recommended clients are:
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* macOS/Linux: default FTP client
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* Windows: Filezilla and FireFTP
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For example, from a macOS/Linux terminal:
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```bash
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$ ftp 192.168.4.1
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```
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The FTP server doesn't support active mode, only passive mode. Therefore, if using the native unix FTP client, immediately after logging in, run the following command:
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```bash
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ftp> passive
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```
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The FTP server only supports one connection at a time. If using other FTP clients, please check their documentation for how to limit the maximum allowed connections to one at a time.
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## FileZilla
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If using FileZilla, it's important to configure the settings correctly.
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Do not use the quick connect button. Instead, open the site manager and create a new configuration. Within the `General` tab, ensure that encryption is set to: `Only use plain FTP (insecure)`.
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In the `Transfer Settings` tab, limit the max number of connections to one. Other FTP clients may behave in a similar ways; visit their documentation for more specific information.
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