def start_characteristic_discovery():
print "Discovering characteristics"
handle_range = ble_driver.ble_gattc_handle_range_t()
handle_range.start_handle = service_start_handle
handle_range.end_handle = service_end_handle
error_code = ble_driver.sd_ble_gattc_characteristics_discover(connection_handle, handle_range)
return error_code
def start_descriptor_discovery():
print "Discovering descriptors"
handle_range = ble_driver.ble_gattc_handle_range_t()
if hrm_char_handle == 0:
print "Error. No HRM characteristic handle has been found"
return
handle_range.start_handle = hrm_char_handle
handle_range.end_handle = service_end_handle
ble_driver.sd_ble_gattc_descriptors_discover(connection_handle, handle_range)
