Add doc about BLE in README.md

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JF 2019-12-26 12:02:01 +01:00
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@ -26,7 +26,7 @@ I've tested this project on the actual PineTime hardware.
* Logs available via JLink RTT;
* Basic LCD driver.
## How to use it
## How to build
* Download and unzip arm-none-eabi and NRF52 SDK
* Clone this repo
@ -68,3 +68,20 @@ $ JLinkRTTClient
## Tools
- https://github.com/eliotstock/memory : display the memory usage (FLASH/RAM) using the .map file from GCC.
## BLE connection, bonding and time synchronization
At runtime, BLE advertising is started. You can then use a smartphone or computer to connect and bond to your Pinetime.
As soon as a device is bonded, Pinetime will look for a **CTS** server (**C**urrent **T**ime **S**ervice) on the connected device.
Here is how to do it with an Android smartphone running NRFConnect:
* Build and program the firmware on the Pinetime
* Install NRFConnect (https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Connect-for-desktop)
* Start NRFConnect and create a CTS server :
- Tap the hamburger button on the top left and select "Configure GATT server"
- Tap "Add service" on the bottom
- Select server configuration "Current Time Service" and tap OK
* Go back to the main screen and scan for BLE devices. A device called "PineTime" should appear
* Tap the button "Connect" next to the PineTime device. It should connect to the PineTime and switch to a new tab.
* On this tab, on the top right, there is a 3 dots button. Tap on it and select Bond. The bonding process begins, and if it is sucessful, the PineTime should update its time and display it on the screen.