From fbfb706aa48dc164c6571702340904bc053a1b11 Mon Sep 17 00:00:00 2001
From: Jean-Philippe Rey <jipe_rey@hotmail.com>
Date: Thu, 1 Dec 2022 15:33:26 +0100
Subject: [PATCH 1/2] Update bluetooth.h

event 'indicateconfirmed' created. Raised upon reception of an 'BLE_GATTS_EVT_HVC' softdevice event.
See https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.2.0/msc_inline_mscgraph_90.png for more info.

This event can be used in the application to provide app-to-app data transfer reliability.
Primarily added to prevent any buffer overflow or data loss between the server and client.
---
 libs/bluetooth/bluetooth.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libs/bluetooth/bluetooth.h b/libs/bluetooth/bluetooth.h
index 6449e7ca35..b2ee2209a1 100644
--- a/libs/bluetooth/bluetooth.h
+++ b/libs/bluetooth/bluetooth.h
@@ -163,6 +163,7 @@ typedef enum {
   BLEP_CENTRAL_NOTIFICATION,        //< A characteristic we were watching has changed
   BLEP_CENTRAL_DISCONNECTED,        //< Central: Disconnected (reason as data low byte, index in m_central_conn_handles as high byte )
   BLEP_TASK_BONDING,                //< Bonding negotiation complete (success in data)
+  BLEP_TASK_CHARACTERISTIC_WRITE_HVC,   //< Central: ATT Handle Value Confirmation after an indication packet 
 #endif
   BLEP_WRITE,                       //< One of our characteristics written by someone else
   BLEP_TASK_PASSKEY_DISPLAY,        //< We're pairing and have been provided with a passkey to display (data = conn_handle)

From 7a8371f1692b1fb03ee8d5bee25c706012fcfa4a Mon Sep 17 00:00:00 2001
From: Jean-Philippe Rey <jipe_rey@hotmail.com>
Date: Thu, 1 Dec 2022 15:35:38 +0100
Subject: [PATCH 2/2] Update bluetooth.c

event 'indicateconfirmed' created. Raised upon reception of an 'BLE_GATTS_EVT_HVC' softdevice event.
See https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v7.2.0/msc_inline_mscgraph_90.png for more info.

This event can be used in the application to provide app-to-app data transfer reliability.
Primarily added to prevent any buffer overflow or data loss between the server and client.
---
 targets/nrf5x/bluetooth.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/targets/nrf5x/bluetooth.c b/targets/nrf5x/bluetooth.c
index 22eb0e2366..ea53704b4a 100644
--- a/targets/nrf5x/bluetooth.c
+++ b/targets/nrf5x/bluetooth.c
@@ -386,6 +386,11 @@ int jsble_exec_pending(IOEvent *event) {
      }
      break;
    }
+   case BLEP_TASK_CHARACTERISTIC_WRITE_HVC: { 
+     bleQueueEventAndUnLock(JS_EVENT_PREFIX"indicateconfirmed", 0);
+     jshHadEvent();
+     break;
+   }
 #if CENTRAL_LINK_COUNT>0
    case BLEP_RSSI_CENTRAL: { //  rssi as data low byte, index in m_central_conn_handles as high byte
      int centralIdx = data>>8; // index in m_central_conn_handles
@@ -1451,6 +1456,14 @@ static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context) {
         jsble_peripheral_activity(); // flag that we've been busy
         break;
       }
+      
+      case BLE_GATTS_EVT_HVC: {
+        // Peripheral sent a ATT Handle Value Confirmation
+        const ble_gatts_evt_hvc_t * p_evt_hvc = &p_ble_evt->evt.gatts_evt.params.hvc;
+        jsble_queue_pending(BLEP_TASK_CHARACTERISTIC_WRITE_HVC, 0); // send HVC event
+        jsble_peripheral_activity(); // flag that we've been busy
+        break;
+      }
 
 #if CENTRAL_LINK_COUNT>0
       // For discovery....