Use pipenv and external libraries

Author: corny

.gitignore

@@ -88,4 +88,4 @@ ENV/
 # Rope project settings
 .ropeproject
 
-/config.yml
+/config.toml

Pipfile

@@ -0,0 +1,16 @@
+[[source]]
+url = "https://pypi.python.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+requests = "*"
+numpy = "*"
+adafruit-circuitpython-bme280 = "*"
+sds011 = "*"
+toml = "*"
+
+[dev-packages]
+
+[requires]
+python_version = "3.7"

Pipfile.lock

@@ -17,7 +17,7 @@ Python 3 program for the [luftdaten.info](http://luftdaten.info/) sensor network
 
 ## Dependencies
 
-    apt install python3-numpy python3-requests python3-yaml python3-serial
+    apt install python3-numpy python3-requests python3-yaml python3-serial pipenv
 
 You also need to install [Adafruit_Python_BME280](https://github.com/adafruit/Adafruit_Python_BME280):
 
@@ -30,9 +30,13 @@ You also need to install [Adafruit_Python_BME280](https://github.com/adafruit/Ad
 
 ## Configuration
 
-Copy the `config.yml.default` to `config.yml` and adjust the settings.
+Copy the `config.default.toml` to `config.toml` and adjust the settings.
 
 
 ## Running a systemd unit
 
 Take a look at the [dusty.unit](contrib/dusty.unit).
+
+## Privileges
+
+The process needs privileges in the groups `i2c` and `dialout`.