Bertrik Sikken

Testcode to read/write data on a DS1961 SHA-1 iButton

Collects data from multiple TTN (v3) gateways for LoRaWAN traffic analysis

Visualization of the sensor.community particulate matter data onto a map of the Netherlands at https://stofradar.nl

Java code to interact with the RIVM samenmeten API, at https://www.samenmetenaanluchtkwaliteit.nl/dataportaal/api-application-programming-interface

Java project to interact with the umeter API

Java code to interact with the Solar Edge API

A java project for accessing the API to RIVM luchtmeetnet

Transferring citizen science sensor data over meshcore

Set of tools to interact with the API at https://packetbroker.net/ API and its data, written in Java

Java application to log data from Browan sensors received over TheThingsNetwork

Bridge software for receiving airborne particulate matter measurements from TheThingsNetwork and forwarding them to sensor.community and opensensemap

Collects energy-related data (electricity and natural gas) and republishes it over a simple REST API

Serves near-realtime traffic data (speed/intensity from NDW) for dutch roads in a friendly format (geoJSON, JSON, SSE)

LED display using 8x8 pixel MAX7219 modules

Autonomous water measurement boat

Counts revolutions using an NRF52840 as quadrature sensor, exposes count over BLE

Utilities for sniffing bluetooth low-energy (BLE) packets using a CC2540 USB sniffer dongle

Working platformio example project for the nicenano NRF52840 board

Protocol implementation for HLK-LD303 radar module

Arduino project to measure mains/grid frequency and publish it as SSE and MQTT streams

Platformio build of the ESP32 CameraWebServer code example

Toont de actuele elektriciteit-kWh-prijs op een 4-cijferig LED display

Arduino ESP8266 software for driving a 80x7 pixel red/green/amber moving LED sign

Java code to interact with NTRIP servers

Python code to communicate over bluetooth (BLE) with a BT785 water conductivity meter

An Arduino-like programming API for the CH55X

Utility which converts time-expansion bat call files into Anabat-compatible files which can be viewed in Analook

Protocol implementation for HLK-LD2410 radar module

Code for interfacing a wireless-sonar-sensor (fish finder)

Experiments to interact with Meshtastic