Lup Yuen Lee 李立源 @lupyuen@qoto.org

#BL602 has a peculiar I2C Port ... It uses I2C Sub Addresses! Here's how we fix our #NuttX Driver

https://lupyuen.github.io/articles/bme280?5#set-i2c-sub-address

Apache #NuttX Driver for BMP280 fails to load on #BL602 ... Let's fix this 🤔

https://lupyuen.github.io/articles/bme280?4#invalid-device-id

Apache #NuttX OS doesn't have a BME280 Driver ... Let's tweak the BMP280 Driver to work with BME280

https://lupyuen.github.io/articles/bme280?3#start-with-bmp280-driver

Here's how we connect BME280 Sensor (Temperature / Humidity / Air Pressure) ... To PineCone #BL602 @PINE64

https://lupyuen.github.io/articles/bme280?2#test-and-connect-bme280

Porting the #BME280 Driver from Zephyr OS to Apache #NuttX OS ... All shall be explained in this article

https://lupyuen.github.io/articles/bme280?1

Our #NuttX BME280 Driver appears as 2 sensors: 1️⃣ "/dev/sensor/baro0" (Barometer Sensor) 2️⃣ "/dev/sensor/humi0" (Humidity Sensor) ... Here's how we read the Air Pressure, Temperature and Humidity

https://github.com/lupyuen/bme280-nuttx#combined-barometer-and-humidity-sensor

At #NuttX Startup we register both BME280 sensors: Barometer Sensor and Humidity Sensor

https://github.com/lupyuen/bme280-nuttx#combined-barometer-and-humidity-sensor

Each #NuttX Sensor defines its operations for 1️⃣ Activating the sensor 2️⃣ Fetching sensor data 3️⃣ Setting the standby interval

https://github.com/lupyuen/bme280-nuttx#combined-barometer-and-humidity-sensor

Gleam Playground (compiles with #RustLang and #WebAssembly)

https://johndoneth.github.io/gleam-playground/

#NuttX doesn't have a Sensor Type that supports BME280 Temperature + Humidity + Pressure ... So our NuttX BME280 Driver combines 2 Sensor Types: 1️⃣ Barometer Sensor (Pressure + Temperature) 2️⃣ Humidity Sensor

https://github.com/lupyuen/bme280-nuttx#combined-barometer-and-humidity-sensor

"The Bvp47 - a Top-tier Backdoor of US NSA Equation Group"

https://www.pangulab.cn/en/post/the_bvp47_a_top-tier_backdoor_of_us_nsa_equation_group/

Gleam v0.20: Type safe and scalable language for #Erlang virtual machine

https://gleam.run/news/gleam-v0.20-released/

"How a Battery Shortage could threaten US national security"

https://www.cnn.com/2022/02/22/cars/electric-vehicle-battery-supply-chain/index.html

Mitigating #Linux Kernel risks on 32-bit ARM

https://security.googleblog.com/2022/02/mitigating-kernel-risks-on-32-bit-arm.html?m=1

"Support #OpenSource that you use by paying the Maintainers to talk to your team"

https://simonwillison.net/2022/Feb/23/support-open-source/

Adding LibreELEC.tv to an existing #PinePhone multi-distro image

https://xnux.eu/log/#062

Which #RustLang Web Framework to choose in 2022

https://kerkour.com/rust-web-framework-2022

We made minimal changes to Zephyr BME280 Driver while porting to #NuttX OS

https://github.com/lupyuen/bme280-nuttx#zephyr-driver-modified-for-nuttx