a.k.a. longest post title ever 😛 This is the Python code for a NodeMCU v3 running MicroPython 1.19.1. It will measure temperature and humidity at the connected DHT22 with breakout board every 30 seconds, connect to WiFi and publish to a MQTT server.The first code block will be the necessary as simple and clear as…
TLDR: Code for MAC address in (Micro)Python and C++ for D1 Mini, Raspberry devices and NodeMCU. I was looking for a unique static identifier to handle my IoT devices without baking the mqtt publish topics, name and location into the code. The code on identical devices should be the same, the the individual configuration should…
My first NodeMCU v3 board. Connected a DHT22 (includes PCB with breakout board) to 3V, ground and data pin to D1 (which is Pin 5). Kept Python code for measuring loop as simple as possible. You will find a fitting pinout at RandomNerdTutorials. This code measures the temperature and humidity every 30 seconds and prints…
Write them. Do not try to save time writing them poorly or even not at all. You and your coworkers and even often your future self will appreciate the work you put in. Many many times I found probable issues, uncovered cases and bugs lurking in my code I wrote by testing the code step…
I like to use the “other view” feature of Notepad++ to show two files side by side. As I often have compare them I really like the synchronized vertical scrolling option which scrolls them both at the same time. There’s an icon you can click, but I prefer to use a key binding to toggle…
It’s a little hidden imo, so future-me or for your service – the setting to show the line numbers.
As all the Raspberry Pis have the same pinout – here is a overview valid for all of them. Thank you pinout.xyz for your great service! The HDMI and USB ports are on the left, the SD card slot on top and the pins on the right.
Thank you AZ-Delivery for this pinout! And thanks for best prices for this. They have got some really good offers here: https://amzn.eu/d/2ZqjALZ (no affiliate link) The onboard LED is at GPIO 2. Checkout Random Nerds Tutorials for which GPIOs to use.
Sweet and short: Instead of a function you can write a single statement in Python as a lambda. Either is one either better or worse nor does one replace the other. They both have their place and intended use. Functions hopefully have describing names, are probably used multiple times and handle a specific part which…
Currently did some text analysis with Python and Regex. Came up with an E-Mail format validation method which could help you with the same problem and remind me of it in the future. Import package re and use the compile method to get a regex pattern with which you can match your desired String.For evaluation…
Most of my Raspberry Pis run headless (just remote console, no GUI). To remind myself and for your service I wrote this short memo how to set them up correctly. You can also find the same and much more Pi related information here, but I like to keep the stuff I need together in one…
Jump to: Pico – D1 mini – Pi Zero Raspberry Pico A short Python implementation of a magnetic switch turning on a LED when it is not connected (e.g. window is opened). For simplicity reasons I used the builtin LED on the Pico. You have to use the pull=Pin.PULL_DOWN parameter for the input pin (sensor)….