hostname and IP on display

README.md

@@ -54,3 +54,27 @@ Credit:  Daníel Bjartur Guðmundsson, transcribed by Joseph T. Foley
 1. `sudo raspi-config`
 1. Advanced Options > A12 WLAN Power Save
 1. Yes to disabling
+
+## I'd like to stop typing my password all the time
+1. Copy your private key to your pi from `~/.ssh/id_*` to the Pi
+1. On the Pi, start ssh-agent with
+   ```eval $(ssh-agent)```
+1. Now add your key
+   ```ssh-add```
+   
+## I'd like to access my pi's files directly on my computer.
+In linux, you can use sshfs:  https://github.com/libfuse/sshfs
+1.  Install sshfs
+	```sudo apt install sshfs```
+1. Make a place to mount the files on the pi
+   ```mkdir username-rover```
+1. Now we mount the pi's filesystem using sshfs
+```sshfs username@host-or-ip /home/username ~/username-rover```
+
+## How do I get the python virtual environment to start each time
+1. Edit your `.bashrc` to have this at the end:
+   ```
+if [ -f ~/env/bin/activate ]; then
+  source ~/env/bin/activate
+fi
+   ```

oled-display/display-info.py

@@ -0,0 +1,85 @@
+# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
+# SPDX-License-Identifier: MIT
+
+"""
+This demo will fill the screen with white, draw a black box on top
+and then print the device's hostname and IP address in the center of the display
+
+This example is for use on (Linux) computers that are using CPython with
+Adafruit Blinka to support CircuitPython libraries. CircuitPython does
+not support PIL/pillow (python imaging library)!
+"""
+
+import board
+import digitalio
+from PIL import Image, ImageDraw, ImageFont
+import adafruit_ssd1306
+import socket
+import platform
+
+# Define the Reset Pin
+oled_reset = None
+try:
+    oled_reset = digitalio.DigitalInOut(board.D4)
+except:
+    pass
+    # No reset pin
+
+# Change these
+# to the right size for your display!
+WIDTH = 128
+HEIGHT = 64
+BORDER = 5
+
+# Use for I2C.
+i2c = board.I2C()  # uses board.SCL and board.SDA
+oled = adafruit_ssd1306.SSD1306_I2C(WIDTH, HEIGHT, i2c, addr=0x3C, reset=oled_reset)
+
+# Clear display.
+oled.fill(0)
+oled.show()
+
+# Create blank image for drawing.
+# Make sure to create image with mode '1' for 1-bit color.
+image = Image.new("1", (oled.width, oled.height))
+
+# Get drawing object to draw on image.
+draw = ImageDraw.Draw(image)
+
+# Draw a white background
+draw.rectangle((0, 0, oled.width, oled.height), outline=255, fill=255)
+
+# Draw a smaller inner rectangle
+draw.rectangle(
+    (BORDER, BORDER, oled.width - BORDER - 1, oled.height - BORDER - 1),
+    outline=0,
+    fill=0,
+)
+
+# Load default font.
+font = ImageFont.load_default()
+
+# Get the local IP address as a string.
+with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as s:
+    s.connect(("8.8.8.8", 80))
+    ipaddr = s.getsockname()[0]
+
+hostname = platform.node()
+text = hostname + "\n" + ipaddr
+
+bbox = font.getbbox(ipaddr)
+(font_width, font_height) = bbox[2] - bbox[0], bbox[3] - bbox[1]
+
+draw.multiline_text(
+    xy=(10,10),
+    text=text,
+    fill=255,
+    font=font,
+    spacing=2, #pixel gap between lines,
+    align="left",
+
+)
+
+# Display image
+oled.image(image)
+oled.show()