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Getting fake Helium hotspots removed from Lantau island

Getting fake Helium hotspots removed from Lantau island

As shown before, much of the blockchain-powered Helium LoRaWAN network is fake, especially in Hong Kong. Scammers claim their hotspots are installed in these locations to earn HNT while in reality they are probably somewhere in a garage, not providing

Tom 09/02/202209/02/2022 projects No Comments Read more

Trying out the Helium LoRaWAN network [scam alert]

Trying out the Helium LoRaWAN network [scam alert]

How it seems that where I happen to live, none of this network is real.. The Helium network has been growing extremely fast. I had checked coverage on my island of Lantau, Hong Kong in early Dec 2021 and only

Tom 27/01/202228/01/2022 projects 1 Comment Read more

LoRaWAN range experiments

LoRaWAN range experiments

With my indoor gateway, a basic Dragino LPS8, i was able to receive packets from over 500 meters distance, with the standard indoor antenna and the gateway positioned near a window about 10m above ground. I read on the TTN

Tom 24/01/202224/01/2022 projects 2 Comments Read more

Getting started with LoRaWAN

Getting started with LoRaWAN

LoRa is a radio technology for low power long range communication, typically kilometers. It is designed for small data packets and uses certain license-free frequency bands: 433, 868, 915-925 MHz depending on your region. It can be used peer-to-peer to

Tom 13/01/202224/01/2022 projects No Comments Read more

Cube timer with touch pads

Cube timer with touch pads

My son has been working hard on his cubing skills, and he showed me some competition videos that use a timing device. I set out to make one, using a ESP32 dev module because i got loads of those, and

Tom 10/06/202010/06/2020 projects No Comments Read more

Beehive monitor, with load cells and temperature sensors

Beehive monitor, with load cells and temperature sensors

I got myself a FlowHive recently in the hope of keeping a colony of bees and producing honey in my village in South Lantau, Hong Kong. While i’m sorting out how to get a colony of local bees (Apis Cerana),

Tom 23/04/202010/06/2020 projects 4 Comments Read more

ESP32 with transparent LCD screen over VGA

ESP32 with transparent LCD screen over VGA

I have quite a collection of old laptops and tablets and except for taking out battery cells (Lipo and 18650s) i have not done much with the other components. The screen was an obvious candidate, but it does not use

Tom 10/04/202010/04/2020 projects 1 Comment Read more

Upgrading dust sensor to laser (PMSA003)

Upgrading dust sensor to laser (PMSA003)

Over the years I’ve built a few dust sensor systems (‘PM2.5’) with SHARP and SHINYEI sensors, but calibration was always a headache as they have analog output. Earlier this year (2019) i looked into the current sensor technology again, and

Tom 19/08/201919/08/2019 projects 3 Comments Read more

8×8 LED mono matrix with ESP8266 web server

8×8 LED mono matrix with ESP8266 web server

This ESP8266-based project runs a simple web server with 1 page to control an 8×8 LED monochrome matrix. It is powered by USB, and portable, as it uses the WiFiManager library to connect to any available wifi network. It allows

Tom 08/05/201813/01/2022 projects 3 Comments Read more

Arduino 8-step drum sequencer (dsp-D8 drum chip)

Arduino 8-step drum sequencer (dsp-D8 drum chip)

This project was designed for 2 workshops i gave at Sonar Hong Kong, as an introduction to Arduino. It uses a standard Arduino UNO to build an 8-step 3-channel sequencer, connected to a custom PCB with an Arduino-based drum chip that

Tom 21/03/201819/05/2018 projects 1 Comment Read more
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Recent projects

  • PIR activated lights for art alley
  • Testing the DFR0580 solar lead-acid battery charger on the bench
  • LoRaWAN river level sensors – battery life
  • The next Helium scam: earning HNT by generating data traffic over low-cost Data-Only Hotspots?
  • Finding real Helium hotspots in Hong Kong (part 2)
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