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Jens Chr Brynildsen jenschr

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jenschr / LoRaDuplexClient
Last active September 11, 2019 07:53
/*
LoRa Duplex communication
Sends a message every half second, and polls continually
for new incoming messages. Implements a one-byte addressing scheme,
with 0xFF as the broadcast address.
Uses readString() from Stream class to read payload. The Stream class'
timeout may affect other functuons, like the radio's callback. For an
@jenschr
jenschr / HC-05_example.cpp
Last active October 27, 2020 13:18
/* HC-05 Serial pass through
The following AT-commands are supported:
AT-command Description
---------- ----------------------------------
AT+ROLE Output the current role (1=master/0=slave)
AT+UART Output UART com settings
AT+UART=115200,0,0 Setup comms to be 115200 baud
AT+ADDR? Check device address
AT+PSWD Check current connection password
@jenschr
jenschr / parseNumberToString.cpp
Last active October 30, 2019 10:21
Basic example of how a way parse a number to a char array using Modulo. Works for Arduino, stm32, Teensy and other Microcontrollers.
signed long int myNum = -1701543;
void setup() {
Serial.begin(9600);
delay(2000);
Serial.print(myNum);
char buff[14];
int bufferLength = parseNumberToString( buff, myNum );
Serial.print(":");
Serial.println(buff);
@jenschr
jenschr / mqttToDatabase.js
Created November 5, 2019 08:35
var mqtt = require('mqtt'); //https://www.npmjs.com/package/mqtt
var Topic = '#'; //subscribe to all topics
var Broker_URL = 'mqtt://localhost';
var Database_URL = 'localhost';
var options = {
clientId: 'MyMQTT'+Math.random()*64545353,
port: 1883,
username: 'MyUsername',
password: 'MyPassword',
@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 / 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 / SerialPassthrough.ino
Last active July 24, 2020 21:24
Simple code snippet for talking to Serial devices - in this case a SIM7600E-H
#include <SoftwareSerial.h>
SoftwareSerial mySerial(8, 9);
void setup()
{
delay(500);
Serial.begin(115200);
mySerial.begin(115200); // use this line on a new module using 115200 baud by default
//mySerial.begin(19200); // after setting the baud rate to 19200, we use this speed for mySerial
pinMode(13, OUTPUT);
@jenschr
jenschr / base.h
Last active September 14, 2020 11:34
To get Flatbuffers to work with Teensy, we need to remove the Arduino specific code for STL (Teensy supports STL directly) in base.h (look for EDIT below, in two places)
#ifndef FLATBUFFERS_BASE_H_
#define FLATBUFFERS_BASE_H_
// clang-format off
// If activate should be declared and included first.
#if defined(FLATBUFFERS_MEMORY_LEAK_TRACKING) && \
defined(_MSC_VER) && defined(_DEBUG)
// The _CRTDBG_MAP_ALLOC inside <crtdbg.h> will replace
// calloc/free (etc) to its debug version using #define directives.
@jenschr
jenschr / 7600_example.h
Last active September 15, 2020 16:10
Simple example for getting started sending SMS (using a button to send the required CTRL+Z char)
// First, wait for the green LED to go solid green
// Then, set the pin code using
// AT+CPIN=2643
// When the green LED blinks, you can check the name of the operator
// AT+CSPN?
// The turn on sending plain text messages (ASCII chars only)
// AT+CMGF=1
@jenschr
jenschr / max7219_matrix.ino
Last active October 3, 2020 15:09
Simple test code for 8x8 led matrix module with Arduino. Requires that you install the LedControl library.
/* Dot matrix control Scrolling
* Tutorial: https://www.electronoobs.com/eng_arduino_tut56.php
*/
#include <LedControl.h> //LedControl library: https://www.electronoobs.com/ledcontrol.php
const unsigned char scrollText[] PROGMEM ={" Embedded Systems "};
const int numDevices = 1; // number of MAX7219s used in this case 2
const long scrollDelay = 60; // adjust scrolling speed