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Jens Chr Brynildsen jenschr

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@jenschr
jenschr / ATtiny412.ino
Last active April 7, 2025 10:04
Example showing full range DAC usage on ATtiny412 using megaTinyCore as well as useful PIN numbers
/*
* In this example, I'm using megaTinyCore with the ATtiny412 Development Board
* by Leonerd https://www.tindie.com/products/leonerd/attiny412-development-board/
*
* The pins for megaTinyCore and 412 are found in:
* /Users/jensa/Library/Arduino15/packages/megaTinyCore/hardware/megaavr/2.6.10/variants/txy2/pins_arduino.h
*
* Useful pins:
* Outputs are referenced using "PIN_PA1"
* I2C is referenced on PIN_WIRE_SDA (PA1) / PIN_WIRE_SCL (PA2)
@jenschr
jenschr / main.cpp
Last active July 15, 2024 09:32
ESP32's can use use either a TCP-client or a HTTP Client to do POST requests. This snippet will let you do a POST request directly to an IP address.
#include <WiFi.h>
#include <HTTPClient.h>
// WiFi network name and password:
const char * networkName = "your-ssid";
const char * networkPswd = "your-password";
// Internet address to send POST data to
const char * hostDomain = "10.13.37.158";
const int hostPort = 3001;
@jenschr
jenschr / settime_Serial.ino
Created May 2, 2024 18:52
Better init code for OWHL
/* improved settimeSerial.ino
https://github.com/millerlp/OWHL/blob/master/settime_Serial/settime_Serial.ino
Use this to get your real time clock date and time values
synchronized closely.
Copyright Luke Miller 2015
To use this program, upload it to your board, then open the
serial monitor at 57600 baud. Make sure the serial monitor
is set to send a 'newline' when you hit return (see the
menu in the lower right of the Arduino serial monitor window)
@jenschr
jenschr / combined.html
Last active April 6, 2024 15:39
Paho MQTT websocket example. I had a hard time finding working examples of using the 1.1.0 version of this lib. Here' a basic setup keeping track of connection and unsent messages.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Konkurranse Nespresso</title>
<script src="http://code.jquery.com/jquery-1.11.3.min.js" integrity="sha256-7LkWEzqTdpEfELxcZZlS6wAx5Ff13zZ83lYO2/ujj7g=" crossorigin="anonymous"></script>
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
@jenschr
jenschr / dweetio.ino
Last active March 1, 2024 08:04
Basic code for setting a Dweet with a GET request on an ESP32
#include <WiFi.h>
/*
* Basic code for setting a Dweet with a GET request on an ESP32
*
* Original by Liz Miller (www.learnrobotics.org)
* Updated for ESP32 by https://gist.github.com/jenschr
*/
// WiFi parameters
const char* ssid = "your-ssid"; // Replace with your ssid
@jenschr
jenschr / IR.ino
Created December 15, 2023 12:25
/*********************************************************
Minimal example for LTR329ALS sensor for LectureFeather
*********************************************************/
#include "Adafruit_LTR329_LTR303.h"
#include <Adafruit_DotStar.h>
Adafruit_LTR329 ltr = Adafruit_LTR329();
// There is only one pixel on the board
#define NUMPIXELS 1
@jenschr
jenschr / Blink-eight-leds.ino
Last active October 15, 2023 11:59
Basic HTML page for talking to Particle Photon
@jenschr
jenschr / AmphenolPressureSensorCodeExample.ino
Last active September 26, 2023 20:34
Simple code snippet for reading Amphenol Pressure sensors with I2C output such as the NPA-700 and NPA-730.
/*
* Simple code snippet for reading Amphenol
* Pressure sensors with I2C output such as
* the NPA Series of Surface-Mount Pressure
* Sensors NPA-700 and NPA-730.
*
* This basic snippet will likely work for
* similar sensors of other brands also.
* I used NPA-730B-05WD to test this. It's
* not an Arduino Library, but that's also
@jenschr
jenschr / VS1053B_Adafruit_playback.ino
Created May 4, 2023 11:11
Simple sketch to make the baldram/ESP_VS1053_Library work with the Adafruit VS1053 breakout
#include <SPI.h>
#include <Wire.h>
#include <VS1053.h>
#include "SampleMp3.h"
// These are the pins used for the breakout example
#define BREAKOUT_RESET 9 // VS1053 reset pin (output)
#define BREAKOUT_CS 10 // VS1053 chip select pin (output)
#define BREAKOUT_DCS 6 // VS1053 Data/command select pin (output)
#define CARDCS 4 // Card chip select pin
@jenschr
jenschr / TTGO_LORA32_BATT_OLED.ino
Created August 10, 2019 14:03
Battery monitor example for the Banggood version of TTGO LoRa32
const uint8_t blue = 2;
const uint8_t vbatPin = 35;
#include <Wire.h> // Only needed for Arduino 1.6.5 and earlier
#include "SSD1306.h" // alias for `#include "SSD1306Wire.h"`
float VBAT; // battery voltage from ESP32 ADC read
SSD1306 display(0x3c, 4, 15);
void setup()
{
Serial.begin(115200);
pinMode(blue, OUTPUT);