Dublin workshop

Tutorial to get familiar with connnecting sensors to O-MI Node the simple way, and introducting subscriptions. Open tutorial-final.pdf slideshow for futrher instructions.

Scripts for Raspberry Pi

co2-omi-send.py: (CO2 sensor with Raspberry Pi)

This script is used to obtain CO2 value through serial interface and send to the O-MI node. Change myhost:post to the address of receiving O-MI node.

• For RPi 1, the serial port is linked to /dev/serial0
• For RPi 3, the port is linked to /dev/ttyS0

ht-omi-send.py: (Humidity and Temperature Sensor with Raspberry Pi)

This script is used to obtain humidity and temperature value from SHT-20 sensor through I2C interface and send to the O-MI node. Change myhost:post to the address of receiving O-MI node.

omi-write.sh: (1-wire sensor)

This bash script library is used to construct O-MI write requests.

create-odf.sh: (structure definition for omi-write.sh)

This script defines the O-DF structure and where to get values. It reads values of Raspberry pi I2C/OneWire sensors.

Programs for ESP8266

temp_humi_test

Reads temperature and humidity from SHT-20 sensors and send to a hard-coded O-MI node.

CO2_test

Reads CO2 from S-100 sensors and send to a hard-coded O-MI node.

Reading Laptop Temperature

omi-send-linux.py:

A python script to send O-MI write request.

omi-send-mac.py:

A python script to remove extra characters and send O-MI write request.

Links

• O-MI Node reference implementation
• Gauge visualization source code