Great microcontroller, bought it at az-delivery.de (no ref link).
The onboard LED pin is 2 (GPIO 4).
from machine import Pin
from time import sleep
pin = machine.Pin(2, machine.Pin.OUT, 1)
while True:
pin.off() if pin.value() else pin.on()
sleep(1)
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…
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.
Materials you need for this: LDRs (I am using 5528), breadboard, jumper wires, resistor (I used 56k) and a 5V power supply. The MicroPython code has been written for and tested on Pi Pico, Pi Pico W, D1 Mini and NodeMCU v3 ESP8266 .I bought it at berrybase.de and az-delivery.de (not referral links). The microcontrollers…
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…
The pinout of Pi Pico and Pico W are the same. Just the onboard LED has changed. See below.
TLDR: Measures temp&hum in a configurable interval and with variable thresholds. Publishes to a mqtt server. Neopixels react to json data at a mqtt topic it is configured to subscibe. Single thread async implementation. Robust wifi and mqtt routines. Code at my github: https://github.com/worksonmymachine-de/iot_temptumsensor_ambilight This device is placed behind my main monitor and reads temperature…