jayendra mishra

Important changes to forums and questions

All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.

10 years, 2 months ago.

can I send digital data though GAP service? IF yes how to include the device?

#include "mbed.h"
#include "BLEDevice.h"

// BLE object
BLEDevice ble;
DigitalIn sensor(P0_5)
// Optional: Device Name, add for human read-ability
const static char     DEVICE_NAME[]        = "Flowmeter Tom_field"; // Optional: device name

// You have up to 26 bytes of advertising data to use.
const static uint8_t AdvData[] = {0x01,0x02,0x03,0x04,0x05};   // example of hex data
//const static uint8_t AdvData[] = {"ChangeThisData"};         // example of character data
static uint8_t analog_enabled = 0;
static uint8_t old_state = 0;
// Optional: Restart advertising when phone app disconnects
void disconnectionCallback(Gap::Handle_t handle, Gap::DisconnectionReason_t reason)
{
    ble.startAdvertising();
}

Question relating to:

Last updated: 12 Jan 2016

Also the code gives errors.

posted by jayendra mishra 23 Jul 2015

1 Answer

Rohit Grover
10 years, 2 months ago.

The GAP service is a standard service with read-only characteristics: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.generic_access.xml

Some of its characteristics can be updated using methods offered by BLE_API, but it's not a good idea to overload standard characteristics to send application-specific digital data.

Accepted Answer

so what is the best process to send a digital data from a sensor. I actually want to calculate the frequency of and send it to the cellphone.

posted by jayendra mishra 24 Jul 2015

https://developer.mbed.org/teams/Bluetooth-Low-Energy/code/BLE_HeartRate/ http://docs.mbed.org/docs/ble-intros/en/latest/GettingStarted/DevIntro/#hearratesample https://developer.mbed.org/teams/Bluetooth-Low-Energy/code/BLE_Button/

posted by Rohit Grover 25 Jul 2015