Hello,
I am using SD 130 on nRF5 with SDK V12.1.0.
I want to write to a characteristic using the android debug app (nrf connect).
This is my code for the characteristic:
ble_uuid_t char_uuid;
char_uuid.uuid = BLE_UUID_MY_CHARACTERISTC_UUID;
err_code = sd_ble_uuid_vs_add(&base_uuid, &char_uuid.type);
APP_ERROR_CHECK(err_code);
ble_gatts_attr_md_t attr_md;
memset(&attr_md, 0, sizeof(attr_md));
attr_md.vloc = BLE_GATTS_VLOC_STACK;
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.read_perm);
BLE_GAP_CONN_SEC_MODE_SET_OPEN(&attr_md.write_perm);
/* Characteristic Value Attribute */
ble_gatts_attr_t attr_char_value;
memset(&attr_char_value, 0, sizeof(attr_char_value));
attr_char_value.p_uuid = &char_uuid;
attr_char_value.p_attr_md = &attr_md; /* assign attribute metadata to characteristic value attribute */
attr_char_value.max_len = 1; /* max value length */
attr_char_value.init_len = 1; /* initial value length */
attr_char_value.p_value = (uint8_t*)&MyVar; /* ptr to actual value */
ble_gatts_char_md_t char_md;
memset(&char_md, 0, sizeof(char_md));
char_md.char_props.read = 1; /* set read property */
char_md.char_props.write = 1; /* set write proper */
err_code = sd_ble_gatts_characteristic_add(p_our_service->service_handle,
&char_md,
&attr_char_value,
&p_our_service->char_handles_dry);
APP_ERROR_CHECK(err_code);
What is happening: I can write a value to the characteristic. When I read it afterwards, it is correct. BUT: The debugger shows me, that MyVar did not change.
Question 1: Where is the new value saved? It's obviously not in MyVar as I assumed.
Question 2: How can I update MyVar with the correct value?
Thank you very much in advance!
Regards
