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J-Rat Techworks

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Start Here by Topic

Looking for a specific area? Start with my guides to Home Assistant, ESP32, Zigbee, LoRa, MeshCore or water tank monitoring.

Wide 16:9 hero image, clean flat-lay on a light neutral desk. In the centre, a small electronics starter setup: ESP32 development board, multimeter, soldering iron, breadboard with jumper wires, resistors, LEDs, wire cutters, heat shrink tubing, and a small plastic project box. Minimal, uncluttered layout. Soft natural lighting, modern and beginner-friendly. No text in image.
  • Projects

Top 10 IoT Projects for Beginners (That You Can Actually Build)

If you’re new to IoT, it’s easy to get stuck…

Read MoreTop 10 IoT Projects for Beginners (That You Can Actually Build)
mmWave Sensor
  • Projects

How to Build a mmWave Radar for Home Assistant

If you’ve ever had your smart lights or plugs turn…

Read MoreHow to Build a mmWave Radar for Home Assistant
Water tank pressure sensor sitting on pavers
  • Projects

Solar-Powered Water Tank Monitor using Home Assistant

If you’re on tank water, the “how much is left?”…

Read MoreSolar-Powered Water Tank Monitor using Home Assistant
LED Light Bar in front of fireplace, light bar is lit up in the same colours as a flame
  • Projects

How to Build a Smart LED Light Bar With ESP32, WLED and Home Assistant

If you’ve been hunting for a tall, slim, smart LED…

Read MoreHow to Build a Smart LED Light Bar With ESP32, WLED and Home Assistant
Ultrasonic water tank sensor powered by a solar panel sitting on top of a brick on top of an old watertank
  • Projects

Water Tank Level Sensor (ESPHome + Home Assistant)

If you’ve ever wondered whether your water tank is about…

Read MoreWater Tank Level Sensor (ESPHome + Home Assistant)
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    How to Flash and Set Up a MeshCore Repeater
  • A wide cinematic image of a terrain map viewed from above, showing two competing wireless mesh networks expanding across hills, houses, and remote locations.
    MeshCore vs Meshtastic: Which LoRa Mesh Platform Is…
  • Realistic 3D-style featured image showing a LoRa MeshCore network across a semi-rural or suburban landscape. A smartphone in the foreground connects to a nearby companion node, while multiple small radio-style nodes are placed across houses, poles, and open land in the background. Glowing wireless signal lines hop from node to node, illustrating decentralised communication, long-range coverage, and repeater-based mesh networking. The scene uses modern cinematic lighting and a polished tech-blog style, with no central router or cloud hub as the main focus.
    MeshCore Explained: A Complete Guide to LoRa Mesh Networking

J-Rat Techworks is my little home lab on the internet.
I build and share DIY electronics, ESP32 projects and home-automation ideas, with full code and build logs so you can copy or remix them.

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