elapsedMillis
Adafruit_Sensor
elapsedMillis | Adafruit_Sensor | |
---|---|---|
3 | 6 | |
83 | 925 | |
- | 1.3% | |
0.0 | 5.7 | |
about 4 years ago | 6 months ago | |
C++ | C++ | |
MIT License | Apache License 2.0 |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
elapsedMillis
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PSA: You're probably using delay() when you want to use millis().
If you're lazy ellapsedMillis also works really well. To my eyes it also results in more easily readable code, I use it a lot.
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millis() overflow will not hurt you...
I made the same discovery a few years ago, but it still found it distasteful to rely on this wraparound effect. Then I discovered the very cool elapsedMillis library, which provides better functionality/flexibility than millis() and also results in more readable code. I ended up writing an article on how to use this library to implement cooperative multitasking, and I've used this approach on many complex projects since then.
- Want to use EVERY_N_MILLISECONDS function in another non LED project.
Adafruit_Sensor
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Using MPU6050 to get orientation
There are a few libraries. A popular, easy to use library is the Adafruit Unified Sensor Library collection that exposes an interface for BNO055 and other similar hardware. You can read it as a quaternion format (better for math geeks who like stable orientation) or as a rotation on X/Y/Z axes in either degrees or radians for people who aren't bothered by issues like gimbal lock when you hit a pure up or pure down orientation.
- Interfacing BMP280 with Arduino
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Need help with DHT22. If the temperature reaches below 0.00C I get a value of -3276.70C. Code in description and more info.
GitHub - adafruit/Adafruit_Sensor: Common sensor library
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Why does it say "Failed to read from DHT sensor!" ill post the code down in the commments
// REQUIRES the following Arduino libraries: // - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library // - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor
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A confusing issue with NodeMCU
// Example testing sketch for various DHT humidity/temperature sensors // Written by ladyada, public domain // REQUIRES the following Arduino libraries: // - DHT Sensor Library: https://github.com/adafruit/DHT-sensor-library // - Adafruit Unified Sensor Lib: https://github.com/adafruit/Adafruit_Sensor #include "DHT.h" #define DHTPIN 4 // Digital pin connected to the DHT sensor // Feather HUZZAH ESP8266 note: use pins 3, 4, 5, 12, 13 or 14 -- // Pin 15 can work but DHT must be disconnected during program upload. // Uncomment whatever type you're using! #define DHTTYPE DHT11 // DHT 11 //#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321 //#define DHTTYPE DHT21 // DHT 21 (AM2301) // Connect pin 1 (on the left) of the sensor to +5V // NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1 // to 3.3V instead of 5V! // Connect pin 2 of the sensor to whatever your DHTPIN is // Connect pin 3 (on the right) of the sensor to GROUND (if your sensor has 3 pins) // Connect pin 4 (on the right) of the sensor to GROUND and leave the pin 3 EMPTY (if your sensor has 4 pins) // Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor // Initialize DHT sensor. // Note that older versions of this library took an optional third parameter to // tweak the timings for faster processors. This parameter is no longer needed // as the current DHT reading algorithm adjusts itself to work on faster procs. DHT dht(DHTPIN, DHTTYPE); void setup() { delay(2000); Serial.begin(115200); delay(2000); Serial.println(F("DHTxx test!")); dht.begin(); } void loop() { // Wait a few seconds between measurements. delay(2000); // Reading temperature or humidity takes about 250 milliseconds! // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor) float h = dht.readHumidity(); // Read temperature as Celsius (the default) float t = dht.readTemperature(); // Read temperature as Fahrenheit (isFahrenheit = true) float f = dht.readTemperature(true); // Check if any reads failed and exit early (to try again). if (isnan(h) || isnan(t) || isnan(f)) { Serial.println(F("Failed to read from DHT sensor!")); return; } // Compute heat index in Fahrenheit (the default) float hif = dht.computeHeatIndex(f, h); // Compute heat index in Celsius (isFahreheit = false) float hic = dht.computeHeatIndex(t, h, false); Serial.print(F("Humidity: ")); Serial.print(h); Serial.print(F("% Temperature: ")); Serial.print(t); Serial.print(F("°C ")); Serial.print(f); Serial.print(F("°F Heat index: ")); Serial.print(hic); Serial.print(F("°C ")); Serial.print(hif); Serial.println(F("°F")); }
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The code I attached below is working for esp32 but not working onesp8266
#include //DHT and Adafruit Sensor library(https://github.com/adafruit/Adafruit_Sensor)
What are some alternatives?
TLE5012-Magnetic-Angle-Sensor - This repository includes an library for Arduino for the TLE5012 Magnetic Angle Sensor with SSC interface.
DHT-sensor-library - Arduino library for DHT11, DHT22, etc Temperature & Humidity Sensors
TaskScheduler - Cooperative multitasking for Arduino, ESPx, STM32, nRF and other microcontrollers
PZEM-004T-v30 - Arduino library for the Updated PZEM-004T v3.0 Power and Energy meter
vzlogger - Logging utility for various meters & sensors
Arduino-Libs - Arduino Libs & Examples: ADS1147, ADS7846, DAC8760, DS1307, RV8523, MCP2515, WS2812, S65-Display, MI0283QT-2/-9/-11, HX8347D, ILI9341, SSD1331
ModuleInterface - Easy config and value sync between IoT modules, database and web pages
SparkFun_MLX90640_Arduino_Example - Controlling and reading from the MLX90640 IR array thermal imaging sensor
Ticker - Ticker library for Arduino
HCSR04-ultrasonic-sensor-lib - Arduino lib for HCSR04 ultrasonic sensor
SHT31 - Arduino library for the SHT31 temperature and humidity sensor
infidel-sensor - Firmware, mechanical and electrical design files for the Inline Filament Diameter Estimator, Lowcost (InFiDEL).