def init_services():
global heart_rate_service_handle
ble_uuid = ble_driver.ble_uuid_t()
ble_uuid.type = ble_driver.BLE_UUID_TYPE_BLE
ble_uuid.uuid = 0x180D
heart_rate_service_handle_send = ble_driver.new_uint16()
error_code = ble_driver.sd_ble_gatts_service_add(
ble_driver.BLE_GATTS_SRVC_TYPE_PRIMARY, ble_uuid,
heart_rate_service_handle_send)
heart_rate_service_handle = ble_driver.uint16_value(
heart_rate_service_handle_send)
ble_driver.delete_uint16(heart_rate_service_handle_send)
if error_code != ble_driver.NRF_SUCCESS:
print "Could not initialize service. Error code: 0x{0:02X}".format(
error_code)
return error_code
print "Services initiated"
error_code = init_characteristics()
if error_code != ble_driver.NRF_SUCCESS:
return error_code
return ble_driver.NRF_SUCCESS
def send_heart_rate_measurement():
hvx_params = ble_driver.ble_gatts_hvx_params_t()
encoded_hrm = ble_driver.uint8_array(MAX_HRM_LEN)
generate_heart_rate()
length = encode_heart_rate_measurement(encoded_hrm, heart_rate)
hvx_length = ble_driver.new_uint16()
ble_driver.uint16_assign(hvx_length, length)
hvx_params.handle = heart_rate_measurement_handle.value_handle
hvx_params.type = ble_driver.BLE_GATT_HVX_NOTIFICATION
hvx_params.offset = 0
hvx_params.p_len = hvx_length
hvx_params.p_data = encoded_hrm.cast()
error_code = ble_driver.sd_ble_gatts_hvx(connection_handle, hvx_params)
actual_hvx_length = ble_driver.uint16_value(hvx_length)
ble_driver.delete_uint16(hvx_length)
if error_code == ble_driver.NRF_SUCCESS and length != actual_hvx_length:
error_code = ble_driver.NRF_ERROR_DATA_SIZE
print "Failed to send heart rate measurement. Error code: 0x{0:02X}".format(error_code)
return error_code
if error_code != ble_driver.NRF_SUCCESS:
print "Failed to send heart rate measurement. Error code: 0x{0:02X}".format(error_code)
return error_code
return ble_driver.NRF_SUCCESS
def send_heart_rate_relay(length, data):
hvx_length = ble_driver.new_uint16()
ble_driver.uint16_assign(hvx_length, length)
hvx_params = ble_driver.ble_gatts_hvx_params_t()
hvx_params.handle = heart_rate_measurement_handle.value_handle
hvx_params.type = ble_driver.BLE_GATT_HVX_NOTIFICATION
hvx_params.offset = 0
hvx_params.p_len = hvx_length
hvx_params.p_data = data
error_code = ble_driver.sd_ble_gatts_hvx(peripheral_connection_handle,
hvx_params)
actual_hvx_length = ble_driver.uint16_value(hvx_length)
ble_driver.delete_uint16(hvx_length)
if error_code == ble_driver.NRF_SUCCESS and length != actual_hvx_length:
error_code = ble_driver.NRF_ERROR_DATA_SIZE
print "Failed to send heart rate measurement. Error code: 0x{0:02X}".format(
error_code)
return error_code
if error_code != ble_driver.NRF_SUCCESS:
print "Failed to send heart rate measurement. Error code: 0x{0:02X}".format(
error_code)
return error_code
return ble_driver.NRF_SUCCESS
def init_services():
global heart_rate_service_handle
ble_uuid = ble_driver.ble_uuid_t()
ble_uuid.type = ble_driver.BLE_UUID_TYPE_BLE
ble_uuid.uuid = 0x180D
heart_rate_service_handle_send = ble_driver.new_uint16()
error_code = ble_driver.sd_ble_gatts_service_add(
ble_driver.BLE_GATTS_SRVC_TYPE_PRIMARY, ble_uuid, heart_rate_service_handle_send
)
heart_rate_service_handle = ble_driver.uint16_value(heart_rate_service_handle_send)
ble_driver.delete_uint16(heart_rate_service_handle_send)
if error_code != ble_driver.NRF_SUCCESS:
print "Could not initialize service. Error code: 0x{0:02X}".format(error_code)
return error_code
print "Services initiated"
error_code = init_characteristics()
if error_code != ble_driver.NRF_SUCCESS:
return error_code
return ble_driver.NRF_SUCCESS