about s120 & s130 send data

[mento]

At s120,i used the following code to send data (to s110)

if(	( wIndicationFlag_Get() == true ) && ( wConfirmFlag_Get() == true ) )		
{
	//APPL_LOG("Write Data\r\n");
	pSend_aray = Load_data();													
	ble_gip_c_bl_write(&m_ble_bas_c,pSend_aray);
}

At s130，how to send data(to s110)?Is have a example code? thanks.

[Jørgen Holmefjord]

Hi,

The Battery Level Characteristic in your screenshot is part of the GATT Battery Service. The service is documented on the infocenter.

Many of the examples in the SDK implement the Battery Service, for instance the Heart Rate Application, HID Keyboard/HID Mouse and Glucose Application examples. The value is updated by calling the function ble_bas_battery_level_update().

If you want to write to this value from another device (I don't see why you would want to do this, so maybe I misunderstood you), you can use the Nordic UART Service (see Nordic UART Service Client example) to transfer the value to the device. The assignment of the value to the battery level characteristic will have to be handled on the receiving device.

Best regards,

Jørgen

[mento]

Hello, If the peripheral sent data to central, i want to use Battery Level, how to set the parameter(central)?

The Nordic UART Service UUID parameter :

#define NUS_BASE_UUID                  {{0x9E, 0xCA, 0xDC, 0x24, 0x0E, 0xE5, 0xA9, 0xE0, 0x93, 0xF3, 0xA3, 0xB5, 0x00, 0x00, 0x40, 0x6E}} /**< Used vendor specific UUID. */

#define BLE_UUID_NUS_SERVICE           0x0001                      /**< The UUID of the Nordic UART Service. */
#define BLE_UUID_NUS_TX_CHARACTERISTIC 0x0002                      /**< The UUID of the TX Characteristic. */
#define BLE_UUID_NUS_RX_CHARACTERISTIC 0x0003                      /**< The UUID of the RX Characteristic. */

[Jørgen Holmefjord]

If you send the data over Nordic UART Service (NUS), you can set the bettery level characteristics value by calling the function ble_bas_battery_level_update() with the value received over NUS as second argument. See the BLE UART Central and Peripheral examples to see how to send and receive data over NUS.

If you want to write directly to the Battery Level characteristic, you can set write permissions in ble_bas.c by adding the line char_md.char_props.write = 1; in function battery_level_char_add(). You also need to replace (or add if not present) the line BLE_GAP_CONN_SEC_MODE_SET_NO_ACCESS(&bas_init.battery_level_char_attr_md.write_perm); with BLE_GAP_CONN_SEC_MODE_SET_OPEN(&bas_init.battery_level_char_attr_md.write_perm); when you initialize the battery service. Notice that allowing writes to the battery service does not comply with the Battery service defined by Bluetooth SIG.