Unable to receive notifications and write certain characteristics to peripheral

RE: Unable to receive notifications and write certain characteristics to peripheral

run_ar — Tue, 28 May 2019 09:35:09 GMT

first you have to enable notification by writing to the cccd. which is what I assume you are doing with the writes (you will get an error on the gatt server if you try to send notifications (sd_ble_gatts_hvx) when the peer is not subscribing). Apart from that you should get the BLE_GATTC_EVT_HVX on the client. sd_ble_gattc_hv_confirm is only needed if you are using indications.

have you checked that you have registered your service as an observer in sdh?

RE: Unable to receive notifications and write certain characteristics to peripheral

Segun Ilori — Fri, 24 May 2019 14:04:36 GMT

I have been successful in writing to all the characteristics. I changed the write_op parameter to BLE_GATT_OP_WRITE_REQ and when a response handler was triggered did nothing else. Before, I wrote again using the BLE_GATT_OP_EXEC_WRITE_REQ.

Concerning notifications, the peripheral sends them for sure. but somehow the BLE_GATTC_EVT_HVX is not triggered. I have also taken care to use sd_ble_gattac_hv_confirm when necessary. Do I need to carry out any specific ation for the BLE_GATTC_EVT_HVX to be triggered?

RE: Unable to receive notifications and write certain characteristics to peripheral

run_ar — Fri, 24 May 2019 12:03:53 GMT

Have you tried to capture a sniffer trace to see what is happening on air? I would guess that maybe you did not discover all the characteristics? and you are not getting notifications, are you sure you enabled notifications for all characteristics?