Lup Yuen Lee 李立源 @lupyuen@qoto.org
- Pronouns/Gender/Sexuality
- He/Him/They, Bisexual/Asexual 🇸🇬
- Date of Birth
- 1969
- Articles
- https://lupyuen.org
IoT Techie and Educator / Apache NuttX PMC
Joined Jan 2020
"Cloning Keys From Video with the Carvera Desktop CNC"
Film studios sue “no logs” VPN provider for $10 million
Writing #Embedded firmware using #RustLang (STM32)
https://www.anyleaf.org/blog/writing-embedded-firmware-using-rust
IoT’s Lesser Known Power: “Good Enough” Data Accuracy (2013)
https://kotahi.net/iots-lesser-known-power-good-enough-data-accuracy/
China power crunch spreads, shutting factories and dimming growth outlook
https://www.channelnewsasia.com/asia/china-power-energy-supply-shortage-2204796
Here's how we visualise #TheThingsNetwork Sensor Data in #Grafana ... With a Custom MQTT Data Source
#PineTime InfiniTime 1.5 "Huckleberry": Alarm app and more
https://www.ncartron.org/infinitime-15-huckleberry-alarm-app-and-more.html
Lup Yuen Lee 李立源
boosted
@lupyuen Floating point numbers compress great with CBOR, you just gotta know the precision you want. (Mostly into 16bit halfs: 12.34 has as much precision there as in decimal, and takes exactly as many bytes as 1234).
Then again, floats on embedded are annoying. (But if it was just that, 1234x10**-2 is just 6 bytes of CBOR and usable w/o needing to know your sensor's scaling factor).
Complete education in Computer Science using online materials
"iPhone 13 feels rough and unfinished"
https://www.zdnet.com/article/the-iphone-13-feels-rough-and-unfinished/
Storing Sensor Data with Prometheus ... And visualising with #Grafana
https://lupyuen.github.io/articles/grafana?12#store-data-with-prometheus
Lup Yuen Lee 李立源
boosted
Lup Yuen Lee 李立源
boosted
@lupyuen this bungling isn't an example of what happens when it goes wrong, it's an example of why it shouldn't be attempted in the first place. The government *can not ever* be trusted to be transparent or competent enough for this approach, because there will never be anybody to hold them accountable.
"COVIDSafe: Australia’s digital contact tracing failure"
Decoding CBOR Payloads from #TheThingsNetwork ... In our #Grafana Data Source
https://lupyuen.github.io/articles/grafana?11#decode-cbor-payload
Transforming MQTT Messages to #Grafana Data Frames
https://lupyuen.github.io/articles/grafana?10#transform-mqtt-messages
How our #Grafana Data Source talks to the MQTT Server at #TheThingsNetwork
https://lupyuen.github.io/articles/grafana?9#mqtt-integration
- Pronouns/Gender/Sexuality
- He/Him/They, Bisexual/Asexual 🇸🇬
- Date of Birth
- 1969
- Articles
- https://lupyuen.org
IoT Techie and Educator / Apache NuttX PMC
Joined Jan 2020
