add more pi setup info

aqi_monitor_py/README.md

@@ -1,13 +1,27 @@
 # Python Sensor Application
 Updated script running on a RaspberryPi. Pure python implementation.
 
+## Pi Setup
+Enable *I2C1*: `sudo raspi-config` > *Interface Options* > *I2C*
+
 ## Install libraries
 ```
-pip install -r requirements.txt
+sudo apt install git python3-pip
 ```
 
+```
+pip3 install -r requirements.txt
+```
+
+Setup *config.json*
+
 # Install service
 ```bash
-sudo cp aqi_monitor_py/service/sensor.* /etc/systemd/system
+sudo cp aqi_monitor/aqi_monitor_py/service/sensor.* /etc/systemd/system
 sudo systemctl enable --now sensor.timer
 ```
+
+Watch service logs for errors:
+```
+journalctl -u sensor -f
+```