The free sample
Your sample is ready.
The first 12 pages of Arduino Bluetooth — Make It Connect — the front matter, the symptom index, and the two chapters that explain why a good tutorial gave you a bad result.
No email, no signup. Yours to keep and to pass on.
One thing about the page numbers
The symptom index inside the sample points at the full 62-page book, not at the sample. That is deliberate — these really are pages 1–11 of the book, folios and all, rather than a teaser re-typeset to look like one. Numbers past 11 are the pages you would be buying.
The rest of it — $9
The sample gives you the mental model and how to identify the module actually in your hand. The remaining 51 pages are the part that fixes it: wiring and the divider rule, baud rates, the four AT dialects, the upload trap, the car, the honest position on iPhone, and the troubleshooting matrix that gives you the test rather than just the fix.
The sketches from the book are free at troniction.com/code. If anything in the sample turns out to be wrong, tell me: hello@troniction.com.