rpi-bme280-server

Web server for Raspberry Pi computers written in Rust serving JSON data from a Bosch BME280 sensor.

Requirements

RPPAL compatible operating system and hardware

Configuration

Configuration is loaded from a TOML file that contains parameters required for the operation. Sample of the configuration

Address of the sensor, path the server should respond to, port server should reserve and limit of measurement considered stale can be customized.

Startup using systemd

A sample of systemd service file is provided at sample.service That must be modified to match compiled programs location

• ExecStart Defines the program that is to be run. Sample assumes that binary is located in /home/Pi/Programs/rpi-bme280-server/ directory and named rpi-bme280-server and that config.toml file is present in the working directory.
• WorkingDirectory Sets the working directory for the program, if ExecStart line does not contain the configuration file location config.toml file must exist in the working directory.

The service file can be copied to target systems /etc/systemd/system/ folder with appropriate name. After file has been copied the server can be started by using $sudo systemctl start sample.service command.

Ouput

When requested server tries to connect to the sensor over I²C, if the sensor is currently in use the most recent measurement that was completed will be returned.

Sample output:

{"unix_timestamp":1630406866,
"temperature_c":17.995813178854586,
"pressure_pa":99947.35153765255,
"humidity_relative":67.69223043636826}