Fairly simple remote control for smart phone app.

[JohnBrown]

I am hoping to develop a device that works as a remote control for a smart phone app. There will be at least 5 buttons, and as the button presses will be infrequent, I am hoping to be able to run the device from a coin cell. The smartphone app only needs to be notified when a button is pressed. Which of the examples, if any, would make the best starting point for such a project?

[Nguyen Hoan Hoang]

there is a good example code just for that with iOS on this blog site http://embeddedsoftdev.blogspot.ca/p/ehal-nrf51.html

The Blinky_be example on this blog allows you to control all 30 i/o pin. The iOS App configure the pin direction (IN or OUT). The iOS App can turn On or Off each i/o pin are all 30 at once. It make use of 2 characteristics. One for configuration, the other for data.

Other examples showing control of LED matrix multi-display where you can type a text on iOS and send it to the Matrix displays. This examples make use of long characteristic write where you can send more than 20 bytes of data.

A UART examples with long write. UART data in/out using one characteristic. iOS App serving as dump terminal.

All examples are updated with SDK6 and SD7 and all projects were created from scratch using Eclipse IDE based project.

[JohnBrown]

Thanks, I will look at that. Just to be clear, though, I don't want to control the nrF51822 from the iPhone, I want to control the iPhone from the nRF51822.