Sensor – qrys.ch

A Raspberry Pi-based weather station, publishing to an MQTT topic

On February 3, 2020 By Marcel In Programming, Raspberry Pi, Sensor

This is mainly an iteration of a previous post A Raspberry Pi-based weather station, posting to WordPress (see there for details on the sensor) but this time publishing to an MQTT topic. Setting up the …

Reading 14bit from an SI7021 temperature and humidity sensor

On July 9, 2019 By Marcel In Raspberry Pi, Sensor

The Si7021-A20 is capable of providing up to 14bit resolution for temperature and up to 12bit for relative humidity, over an I2C connection. However, many examples on the internet only use 8bit. I tried to …

A Raspberry Pi-based weather station, posting to WordPress

On July 4, 2019 By Marcel In Linux, Programming, Raspberry Pi, Sensor

To finally do some hardware stuff again, I decided to create a simple weather station using one of these very small Raspberry Pi Zero modules. To publish the measurements to, I chose to use a …