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, by Marco Schwartz
Free Ebook , by Marco Schwartz
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Product details
File Size: 18412 KB
Print Length: 252 pages
Publisher: Packt Publishing (December 22, 2014)
Publication Date: December 22, 2014
Sold by: Amazon Digital Services LLC
Language: English
ASIN: B00RP13B76
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Amazon Best Sellers Rank:
#506,611 Paid in Kindle Store (See Top 100 Paid in Kindle Store)
I am giving this 5 stars because I don't think there are any other books like it, but it does come with some warnings. I bought it specifically for the Android controlled Bluetooth robot plans near the end of the book. The author gives links directly to parts on the DFRobot and Adafruit websites supplying the parts he uses, which is great, and he explains everything very well.The links still work. However, particularly in the case of DFRobot, some of their parts had actually changed since the book's printing, so you'll need to order extra parts to fill in the now-missing pieces (in my case, some longer metal standoffs, a charger for the battery, and some extra jumper wires).In addition, you will need to learn to solder to affix header pins to the Bluetooth module, so you'll need a soldering kit, which immediately bumps up anything Arduino to at least intermediate skill level, as the Arduino starter kit doesn't touch on soldering.The worst part, though, was that the Android libraries have all changed since late 2014, and the Android code in the book, which I'm sure worked when the book was written (it compiles fine), now throws exceptions all over the place and does not connect a phone to the robot. Luckily I downloaded some source code for the Nordic Semiconductor's nRF UART app which was recommended by Adafruit to test the Bluetooth module used on the robot, which did work with the newer Android SDK's, and I was able to adapt that to get the robot connecting and working.However, all of this took at least 3 extra orders of parts (including the soldering kit) and reviewing numerous tutorials online on soldering and Android programming, which I was not prepared for. The extra orders did not cost a lot of extra money, but DFRobot is in Hong Kong, so sometimes it took weeks.All of that being said, none of this is the book's fault. These were changes made by DFRobot to products without changing their part numbers, and by Google to the Android SDK's which invalidated working source code. This book got me pretty far, and I was able to get the rest of the way using free online tutorials. I don't think there are any other books out there, yet, that would even do that much.
The book is organized like a typical programming book, starting off with the basic programming environment setup and then on to the hello world exercise before experimenting with more complex concepts. My problem here is that for a book that "is aimed for anyone who is knowledgeable in either the Arduino or Android ecosystems", it just seems like a waste of time to set aside so many pages in the first chapter to cover the setting up of the Arduino and Android programming environment. Not only are both of these environment setup already in the simplest form but there are literally hundreds of tutorials and some with video out there to hand hold anyone who are completely new to those world. However, anyone who are that new to either of these two world would probably find many of the later exercises (especially the coding part) way above their head and won’t make any sense to them. I would rather the authors has spend those time instead to perhaps discuss more details on what the advantages are with using their aRest library for the Arduino. Instead, this is just a link to the online aRest Github library for further reading. What a let down for me on the first chapter. The rest of the chapter 1 covers the basic "Hello World" from both Arduino and Android perspective. Again, hardly anything ground breaking here. [Sorry if I sounded hash perhaps I’m just done with all the non-imaginative Hello World that litters across every programming books now a day.]Chapter 2 was exciting for only about 2 min until I see the Frizing breadboard diagram. Granted, there’s not much of a schematic to speak of but showing of a Frizing breadboard diagram in place of a circuit schematic is just one of the worst thing that is going on out there in the Arduino world. It promote a poor practice that does not teach or help people understand what their circuit is doing but just "here are your connections you need to make". I mean if anyone who need to use a Frizing breadboard diagram to connect up the nRF8001 (Bluetooth Low Energy transceiver – or BLE for short) to the Arduino board. He could probably be better served by perhaps a more detail explanation on SPI communication protocol, which is what the board/chip uses. The walk through of the code on the other hand was better since it actually explain how the aRest library is helping to format and communicate with the Android (or any other controller/receiver). The corresponding code section for Android was a good refresher for those that has done Android before but has been away from it for several years like myself. Although some of the walk through just seems to be more like page fillers then informative.Chapter 3 starts with the same poor choice of a Frizing diagram (at least use their schematic diagram if you must use Frizing but for hobbyist/beginners, there are a lot of other alternatives). Other than that, conceptually speaking, this chapter is just the next iteration of the exercise from Chapter 2 with just the addition of sending the temperature and humidity values from the added temperature/humidity sensor (DHT11).Chapter 4 shows the advantage of why using an external library such as aRest can have when you switch your communication stack. In this case, we’re now switching from using a Bluetooth Low Energy to WiFi. Along with a current sensor (ACS712) and a 5V relay. By now, I’m just ignore the Frizing diagram and skipping straight to the code itself. Here I kind of wish they would have stuck with the BLE instead of switching since I do not have the TI based CC3000 WiFi board. Instead I only have the cheaper ESP8266 and since the aRest library does not support this component yet, I wasn’t able to completely reproduce the code itself but I was still able to follow along the code. One thing that starts to become a drag by now is the extremely detail of the code walk through (especially on the Android side). For those who has more experience, you will ended up skipping quite a bit of these pages in this chapter. However, I feels that this is still valuable in here for those that are fairly new to Android.I’m not sure why the authors decided to switch Arduino from the basic UNO model to the YUN model (which is a more powerful version of Arduino with a minimal Linux stack so that it can run OpenWrt, has USB hosting capability, a build in SD card, and a few other functions). Since I don’t have a YUN, I wasn’t able to complete the exercise even from a conceptual point of view. The better challenging exercise here would be to still use the UNO for this chapter. However, I do not know what the cost in components as well as whether the UNO can even provide that kind of capabilities to meet the challenge of this exercise.Chapter 6 is on a topic that so many new beginners in Arduino has inquired about, which is to use a remote device (typically a phone or controller) to control an Arduino Robot. In this case, the exercise is on the simple controlling of a 5V servo motor. Not really sure what is new in here other than hey, we’re now playing with a servo motor.Chapter 7 shows a much more interesting functionality. Namely, voice recognition on the Android. Specifically, the exercise is to use the Android’s voice recognition instead of using text boxes and buttons to gather and then send commands over the BLE or WiFi as in previous chapters. This relies mainly on Android’s built in Google Speech Recognition functions. I’ve spent quite a bit of time in experimenting with various parts of the code on the Android side and frankly I think the whole Speech Recognition by far outweighs everything else within the chapter and wish there are more detail exploration in this area. [maybe a follow up chapter or book?]Chapter 8 deals with the use of NFC as a sensor input, unfortunately I do not have the NFC shield as specified in the book so I can only go through the code and concept. Perhaps something I can do at a later time when I can acquire some NFC cards and sensor. From a device point of view, there really isn’t anything too special about an NFC but just a different type of sensor to be used with the Arduino.Chapter 9 is in the control of a robot using off the shelf shields with the Android phone serving as the remote controller able to send over Left and Right Turn control over the BLE. Unfortunately I do not have all the parts to configure the same robot as specified in the book. One thing that I did notice is that the robot does not appear to be using any sort of PID to provide for feedback control for better speed matching on the left and right motor. I would suspected that this isn’t an issue here since the robot would always be in manual control and not in any autonomous mode. But for any sort of autonomous mode of operation, a feedback mechanism would have to be introduced.Chapter 10 introduces the reader to the world of health related sensor, specifically the use of a pulse rate sensor to monitor heart rate. From a level of difficulties point of view, this is probably no more difficult as any other sensor and probably belong to a much earlier on chapter then in here. The only level of increased difficulties is in the introduction of graphing on the Android side.Overall, I think of this book more along the lines of an introductory cookbook style book trying to bridge together the use of everyday object such as an Android phone with the world of Arduino. At times the book seems to be too trivial in certain areas and too over grossing in others. The target audience isn’t necessary the ‘experienced’ programmers nor the completely ‘green’ tinkerers but more along the lines of someone who just want to follow some step by step instructions to perform some basic functions.
Great book, the projects where easy to follow and explained pretty well. I would recommend you look at each project and figure out what you need to build it. Then order the components right away. I found my self waiting... and it was hard not to keep reading. The authors leaves github links so you can download the code if you get lost. Over a great book for learning more about he Arduino platform.
Very well documented projects. As the title says, you should have a working knowledge of Android development for these projects but no need to be an expert Android developer.You may want to buy the book first and browse some of the hardware lists near the beginning of most chapters. The hardware lists are complete and also include the URL of the various parts suppliers.Found the projects easy to follow and so far, all work well for me through the first 3.
I love this book as it start from very beginning. It is learn by practising and I love that model because it is so effective. Any one who love hobby electronics and integrate it with Andriod and Ardunio, then this is the book. You don't need great deal of knowledge in either very much. I feel anyone with some background in programming would be able to use this for best.
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