Learning BeagleBone Python Programming by Alexander Hiam

By Alexander Hiam

BeagleBone is a barebone machine that may be configured and customised for various functions and is sort of part the cost of a regular computing device. This booklet will disguise the fundamentals of the way BeagleBone Black's interface subsystems paintings, and will be managed utilizing renowned Python libraries for BeagleBone Black. you'll be brought to BeagleBone Black's GPIO, PWM, ADC, UART, SPI, I2C, and eQEP subsystems. we are going to then dive deep into extra complicated integrated peripherals, demonstrating alternative ways to obtain enter from a consumer together with buttons, potentiometers, and rotary encoders with the eQEP module. we'll additionally know about interfacing with exterior units; this may be tested utilizing the serial modules to interface with exterior units corresponding to temperature sensors and accelerometers. in the direction of the tip of the booklet, we are going to current a number of real-world difficulties and show the right way to remedy them with the talents you've bought.

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Attach a Volume import boto import time def create_and_attach_volume(instance, volume_size, device_name): """ Create a new EBS volume and attach it to the instance. instance The instance object representing the instance to which the volume will be attached. volume_size The size (in GB) of the new volume. device_name The device name to which the new volume will be referred to on the instance. create_volume(volume_size, azone) # Wait for the volume to be created. id, device_name) return volume Back Up Your EBS Volumes Problem You have vital information stored on EBS volumes and you want to make sure that the data is safe.

To accomplish this, we need to gather some information: We need to know the AMI, keypair, security groups, availability zone, instance type, etc. of the current instance. We can get all of that information easily from the boto Instance object that represents the current instance. We need to make copies of all EBS volumes that are attached to the instance. For this recipe, we will assume that the latest snapshot of the volumes represents the state we want to recreate. We need the user_data that was passed to the instance when it was started.

Originally, that was the only region available, but AWS has expanded its operations considerably and, at the time of this writing, EC2 was available in the following regions, each with its own endpoint: us-east-1 [US-East (Northern Virginia)] us-west-1 [US-West (Northern California)] eu-west-1 [EU (Ireland)] ap-southeast-1 [Asia Pacific (Singapore)] ap-northeast-1 [Asia Pacific (Tokyo)] boto provides a number of ways to find and connect to these regions. For example, the following will return a list of all RegionInfo objects for a given service (EC2 in this case).

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