This tutorial explains how to interface LM35 Temperature sensor with Beaglebone black to work with sensor interfacing. LM35 is an analog sensor which measures the temperature and linear output given in voltage form. I have interfaced temperature sensor LM35 with 12 bit ADC of BBB where output of LM35 is in analog form and output of ADC is in digital value and later is converted in Celsius and Fahrenheit by formula. LM35 is with 3 terminals- Vcc terminal is connected with 3.3 V supply, Ground is connected with ADC ground of BBB (pin number 34th of header P9) and Output terminal is connected to the input of AIN1 (pin number 40th of header P9). Now you can open the command terminal and take an access of Beaglebone black through SSH as explained in getting started with Beaglebone black.
When you execute python script from SSH command prompt, you need to make BBB connection with PC because you are accessing the BBB through SSH connection. If you wish to run Python Script on BeagleBone Black Boot without connecting it with PC, an external power is needed to be supplied. You can run python script when you power up BBB without any command prompt or command by Crontab. Crontab is a task management tool which is built-in into Debian and then we can add the new Cron Job at which a Python script will run at boot. When script is running, both the LEDs are switched ON and OFF for one second.
How to capture images and video on the beaglebone – I do this using Open Source Computer Vision (OpenCV) image processing. OpenCV image processing captures image and video data on the BBB (Beaglebone Black) with the help of USB webcams by using python script programming. It is simple tutorial where you can also add effects in the form of black and white image, motion detection, sharp picture etc. I have used opencv library which programs functions of real time computer and machine learning. In this project required tools are Webcam and Beaglebone Black.
This tutorial explains how to connect Beaglebone with WI-FI adapter for internet connectivity. Before proceeding, we need some basic configuration as well as an internet connection. First connect the internet through Ethernet. Complete step-by-step guide to get WiFi running for your BeagleBone Black to manually configure the adapter to automatically connect with your network. Before you get started make sure that you are running the latest official Debian image on BeagleBone Black. Here, I have used EDMAX which works with almost any kind of WI FI adapter.