hostname and IP on display

README.md

@@ -12,7 +12,8 @@ Scripts and documentation for setting up a Raspberry Pi (Zero W 1 or 2) for use
    sudo apt-get -y upgrade
    ```
 
-1. [Gadget Mode to setup a network connection over USB](https://github.com/raspberrypi/rpi-usb-gadget)
+1. [Gadget Mode to setup a network connection over USB](https://github.com/raspberrypi/rpi-usb-gadget).  A more explanatory version in the [Raspberry Pi Newsletter](https://www.raspberrypi.com/news/usb-gadget-mode-in-raspberry-pi-os-ssh-over-usb/)
+    * If you don't have Internet Connection Sharing, th pi will show up as 10.12.194.1
 1. [Setup the OLED screen to print the IP](oled-display/README.md)
    Based upon [Marcel's script on github to show the IP address on the OLED screen](https://github.com/mkyas/cpsy-display-ip)
 1. Install Blinka by following the guide [CircuitPython Libraries on Linux and Raspberry Pi](https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi)]
@@ -48,3 +49,32 @@ Credit:  Daníel Bjartur Guðmundsson, transcribed by Joseph T. Foley
 1.    Show details of "preconfigured" network:  nmcli connection show preconfigured
 1.    Change the SSID (which wireless network you will connect to) in the "New_SSID": nmcli connection modify preconfigured wifi.ssid "New_SSID"
 1.    Change the wireless access password in the "New_Password":  nmcli connection modify preconfigured wifi-sec.psk "New_Password"
+
+## Wifi keeps dropping out.  What do I do?
+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
+   ```

Scripts/gadget.sh

@@ -18,20 +18,27 @@ else
 fi
 
 # Is the dwc2 overlay installed?  Nothing will work if it isn't.
+<<<<<<< HEAD
+if lsmod | grep -q "dwc2"; then
+    echo "DWC2 module loaded, setting up OTG gadget serial and ethernet" | logger -t $0 -p info
+    echo "DWC2 module loaded"
+=======
 if [ -d /sys/class/udc ] && [ -n "$(ls -A /sys/class/udc)" ]; then
     systemd-cat -t gadget.sh -p info echo "DWC2 precompiled, setting up OTG gadget serial and ethernet"
 elif lsmod | grep -q "dwc2"; then
     systemd-cat -t gadget.sh -p info echo "Pre 6.18.39 kernel.  DWC2 module loaded, setting up OTG gadget serial and ethernet"   
+>>>>>>> master
 else
-    systemd-cat -t gadget.sh -p warning echo "DWC2 module missing.  Aborting OTG setup."
+    echo "DWC2 module missing.  Aborting OTG setup." | logger -t $0 -p info
+    echo "DWC2 module missing"
     systemctl disable serial-getty@ttyGS0.service
     exit 1
 fi
 
-sudo modprobe libcomposite
+modprobe libcomposite
 cd /sys/kernel/config/usb_gadget
 if [ -d "MyGadget" ]; then
-    systemd-cat -t gadget.sh -p warning echo "MyGadget already exists.  Aborting OTG setup."
+    echo "MyGadget already exists.  Aborting OTG setup." | logger -t $0 -p info
     exit 1
 fi
 

lgpio/blink.py

@@ -1,19 +0,0 @@
-#!/usr/bin/python
-# From https://raspberry.tips/en/raspberrypi-tutorials/raspberry-pi-gpio-python
-import lgpio
-import time
-
-# Open GPIO chip (0 = /dev/gpiochip0, on Pi 5 gpiochip4 also possible)
-h = lgpio.gpiochip_open(0)
-
-try:
-    lgpio.gpio_claim_output(h, 18)   # GPIO18 (pin 12) as output (MOTA1)
-
-    for _ in range(5):
-        lgpio.gpio_write(h, 18, 1)   # HIGH
-        time.sleep(0.5)
-        lgpio.gpio_write(h, 18, 0)   # LOW
-        time.sleep(0.5)
-    
-finally:
-    lgpio.gpiochip_close(h)          # Always close!

lgpio/motor-test.py

@@ -1,34 +0,0 @@
-#!/usr/bin/python
-# This test assumes you are trying to control a motor through a DRV8833 motor
-# controller chip.  This general approach should work for other motors as well.
-import lgpio
-import time
-
-# pin assignments
-gpio_pwm = 18  #MOTA1
-gpio_reverse = 16 #MOTA2
-gpio_notsleep = 24 #MSLEEP
-# parameters
-pwm_freq = 1000
-
-
-h = lgpio.gpiochip_open(0)
-try:
-    lgpio.gpio_claim_output(h, gpio_reverse)
-    lgpio.gpio_claim_output(h, gpio_notsleep)
-    lgpio.gpio_write(h, gpio_reverse, 0)   # low on reverse pin to turn off h-bridge MOTA2
-    lgpio.gpio_write(h, gpio_notsleep, 1)   # high on /sleep to enable both h-bridges
-    
-    while True:
-        for pwm_level in range(0,100):
-            lgpio.tx_pwm(h, gpio_pwm, pwm_freq, pwm_level)
-            pwm_level += 10
-            time.sleep(0.05)
-        for pwm_level in range(100,0,-1):
-            lgpio.tx_pwm(h, gpio_pwm, pwm_freq, pwm_level)
-            pwm_level += 10
-            time.sleep(0.05)
-
-finally:
-    lgpio.gpio_write(h, gpio_notsleep, 1)   # high on /sleep to disable    
-    lgpio.gpiochip_close(h)          # Always close!

lgpio/pwm-test.py

@@ -1,25 +0,0 @@
-#!/usr/bin/python
-# From https://raspberry.tips/en/raspberrypi-tutorials/raspberry-pi-gpio-python
-import lgpio
-import time
-
-# Open GPIO chip (0 = /dev/gpiochip0, on Pi 5 gpiochip4 also possible)
-h = lgpio.gpiochip_open(0)
-# Hardware PWM on GPIO18 (pin 12) must be PWM-capable
-pwm_pin = 18
-pwm_freq = 1000
-try:
-    while True:
-        for pwm_level in range(0,100):
-            lgpio.tx_pwm(h, pwm_pin, pwm_freq, pwm_level)
-            pwm_level += 10
-            time.sleep(0.05)
-        for pwm_level in range(100,0,-1):
-            lgpio.tx_pwm(h, pwm_pin, pwm_freq, pwm_level)
-            pwm_level += 10
-            time.sleep(0.05)
-
-            
-finally:
-    lgpio.tx_pwm(h, pwm_pin, 0, 0)   # Stop PWM
-    lgpio.gpiochip_close(h)          # Always close!

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()