These notes were for a job I am no longer at and are very dated. Please go to the imagemagick website for updated instructions.
The version of ImageMagick that is installed when you run apt-get install imagemagick on Ubuntu 14.04 is older than I would like.
$ convert --version
| # Scanner i2c en MicroPython | MicroPython i2c scanner | |
| # Renvoi l'adresse en decimal et hexa de chaque device connecte sur le bus i2c | |
| # Return decimal and hexa adress of each i2c device | |
| # https://projetsdiy.fr - https://diyprojects.io (dec. 2017) | |
| import machine | |
| i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4)) | |
| print('Scan i2c bus...') | |
| devices = i2c.scan() |
| /* | |
| * Multiplexed SSD1306 Demo | |
| * Copyright © 2018-01-02 tobozo | |
| * | |
| * https://github.com/tobozo | |
| * https://twitter.com/tobozotagada | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a copy of | |
| * this software and associated documentation files (the “Software”), to deal in | |
| * the Software without restriction, including without limitation the rights to |
These are example files from the tutorial by @boneskull as seen on Get on The Good Foot with MicroPython on the ESP32, Part 2
| # inspired by cncjs-pendant-raspi-gpio: https://github.com/cncjs/cncjs-pendant-raspi-gpio | |
| # This CNC.js pendant opens a connection to the CNC.js web server, opens a serial port connection, | |
| # writes a command, then terminates. | |
| import jwt | |
| import logging | |
| from socketIO_client import SocketIO, LoggingNamespace | |
| SERVER_ADDRESS = "localhost" | |
| SERVER_PORT = 8000 |
| # Playback on USB audio device (the second soundcard's first device), | |
| # with omxplayer: | |
| # | |
| # $ ./play.sh myfile.mp4 | |
| # | |
| # Use 'aplay -l' to list available devices, e.g: | |
| # | |
| # $ aplay -l | |
| # card 1: Device [USB Audio Device], device 0: USB Audio [USB Audio] | |
| # Subdevices: 1/1 |
| async () => { | |
| const response = await fetch('large.bin'); | |
| const buffer = await response.arrayBuffer(); | |
| }; |
| // Display - https://pmdway.com/collections/oled-displays/products/0-49-64-x-32-white-graphic-oled-i2c | |
| // Guide - https://pmdway.com/blogs/product-guides-for-arduino/tutorial-using-the-0-49-64-x-32-graphic-i2c-oled-display-with-arduino | |
| // TCA9548A - https://pmdway.com/blogs/product-guides-for-arduino/using-the-tca9548a-1-to-8-i2c-multiplexer-breakout-with-arduino | |
| #include <Arduino.h> | |
| #include <U8g2lib.h> | |
| #include <Wire.h> | |
| void TCA9548A(uint8_t bus) | |
| { |
| # Copyright public licence and also I don't care. | |
| # 2020 Josh "NeverCast" Lloyd. | |
| from micropython import const | |
| from esp32 import RMT | |
| # The peripheral clock is 80MHz or 12.5 nanoseconds per clock. | |
| # The smallest precision of timing requried for neopixels is | |
| # 0.35us, but I've decided to go with 0.05 microseconds or | |
| # 50 nanoseconds. 50 nanoseconds = 12.5 * 4 clocks. | |
| # By dividing the 80MHz clock by 4 we get a clock every 50 nanoseconds. |
| #!/bin/bash | |
| # This bash script outputs the status of your Pi and checks whether you are being throttled for undervoltage and gives you your temperature | |
| # Article and discussion at https://jamesachambers.com/measure-raspberry-pi-undervoltage-true-clock-speeds/ | |
| # Author James A Chambers 6-6-17 | |
| # Output current configuration | |
| vcgencmd get_config int | egrep "(arm|core|gpu|sdram)_freq|over_volt" | |
| # Measure clock speeds | |
| for src in arm core h264 isp v3d; do echo -e "$src:\t$(vcgencmd measure_clock $src)"; done |
