Revision as of 12:06, 1 June 2014

Raspberry Pi Energy Monitoring Shield

Development Thread=

http://openenergymonitor.org/emon/node/3937 http://openenergymonitor.org/emon/node/3937 [G+ Development Photos Album]

Disable Pi Serial Console

Simple script to easily enable & disable the Raspberry Pi's serial console. Disabling the serial console is required if you want to use the Raspberry Pi's serial port (UART) to talk to other devices e.g. ATmega328 microcontroller on emonPi (see <http://elinux.org/RPi_Serial_Connection> for more information).

https://github.com/lurch/rpi-serial-console

$sudo wget https://raw.github.com/lurch/rpi-serial-console/master/rpi-serial-console -O /usr/bin/rpi-serial-console && sudo chmod +x /usr/bin/rpi-serial-console

$ sudo rpi-serial-console disable

$ sudo reboot

$ rpi-serial-console status

You should see the message Serial console on /dev/ttyAMA0 is disabled, the serial port is now free for communication with the ATMega328 on the emonPi

Setting Up Wifi

Using Edimax EW-7811

We need to edit the file /etc/network/interfaces on the root file system partition of the Pi's SD card.

Either connect Pi via Ethernet and access via SSH or connect a keyboard mouse and screen to the Pi or edit the file on your computer. Assuming your connect to the Pi via SSH:

$ sudo nano /etc/network/interfaces

Change interfaces file to the following entering your SSID and password.

auto lo

iface lo inet loopback

iface eth0 inet dhcp


auto wlan0

allow-hotplug wlan0

iface wlan0 inet dhcp

wpa-ssid "YOUR_SSID"

wpa-psk "WIFI_PASSWORD"

[CTRL] + [X] to save and exit nano

either reboot the Pi or just reboot the adapter

$ sudo ifdown wlan0; sudo ifup wlan0

Script to check for working wifi connection and restart wifi if needed https://github.com/dweeber/WiFi_Check