Lup Yuen Lee 李立源 @lupyuen@qoto.org

BME280 Standby Interval is configured by #NuttX at runtime ... Here's how we do it

https://lupyuen.github.io/articles/bme280?10#standby-interval

How our #NuttX BME280 Driver reads the Sensor Data from Zephyr BME280 Driver

https://lupyuen.github.io/articles/bme280?9#read-sensor-data-from-zephyr-driver

Mapping the BME280 Driver from Zephyr OS to Apache #NuttX OS

https://lupyuen.github.io/articles/bme280?8#zephyr-to-nuttx

Here's why we port the BME280 Driver from Zephyr OS to Apache #NuttX OS

https://lupyuen.github.io/articles/bme280?7#port-bme280-driver-from-zephyr-os

Here's how we read the BMP280 Sensor on Apache #NuttX OS ... With the Sensor Test App

https://lupyuen.github.io/articles/bme280?6#run-sensor-test-app

#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

#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

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

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

Zephyr BME280 Driver ported to Apache #NuttX OS ... Works great on NuttX! 🎉

https://github.com/lupyuen/bme280-nuttx#output-log

BME280 Standby Duration is static in Zephyr but configured at runtime in #NuttX ... So we set it in our NuttX BME280 Driver

https://github.com/lupyuen/bme280-nuttx#standby-duration

Power Management works a little differently in #NuttX vs Zephyr ... Here's how our NuttX BME280 Driver calls the Zephyr Driver to do Power Management

https://github.com/lupyuen/bme280-nuttx#power-management

Chicken Spaghetti with Broccoli

Our #NuttX BME280 Driver reads the Sensor Data from Zephyr Driver in two steps: 1️⃣ Fetch the sensor sample 2️⃣ Get the channel data

https://github.com/lupyuen/bme280-nuttx#read-sensor-data-from-zephyr-driver