Now available from PMD Way is the useful HC-05 serial Bluetooth module. The HC-05 is the same as the popular HC-06, except that his unit can operate as a Bluetooth master or slave device - whereas the HC-06 is only a slave device. Click here for packs of ten units. Please note - cannot be used with an iPhone. Click here for a suitable module. More information: AT Command data sheet (.pdf) Arduino library Don't forget to check out our full range of Bluetooth breakout boards if this doesn't meet your needs. And as always, all orders receive free delivery. And remember ... if you: can't find what you need not sure what to order want a bulk deal need technical support or just want to have a talk ... Please email us via [email protected]. To keep up to date with new products, news, tutorials and more - we're on x, Facebook, Instagram, threads, reddit, and instructables.