8 accessories initialized force the 1st one to be considered as a Hub/HomeBridge about esphap HOT 13 OPEN

Tried modding values from "arduino_homekit_server.cpp" file :
FROM

#define HOMEKIT_MAX_CLIENTS  8
#define CLIENT_CONTEXT_CACHE_SIZE 8

TO

#define HOMEKIT_MAX_CLIENTS  12
#define CLIENT_CONTEXT_CACHE_SIZE 12

Didn't helped so far, am I using too many accessories ?

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Hello usually this happens if compilation setting lwIP is not valid
According to doc
! Note for ESP8266 boards select lwIP Variant :v2 High bandwidth. Device behaviours is more stable especially in pairing process

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Hello @Yurik72 and thanks for your answer.
I'm using an ESP32, not an ESP8266.
So I really don't know what is happening here.
Trying to compile with DEBUG MODE enabled to see if I can gather additionnal reasons of why this is happening.

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This happens if tcp stack overfull. usually not happening on ESP32, therefore i thinking about ESP8266.
I meet couple of times when debugging. and didn't catch how to improve. after reboot esp. usually disappears

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With Core debug level set to DEBUG at compilation time, I just get nothing more in the console's output :

14:10:47.482 -> [ 18043][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 12 - AP_STACONNECTED
14:10:47.652 -> [ 18212][D][WiFiGeneric.cpp:929] _eventCallback(): Arduino Event: 14 - AP_STAIPASSIGNED
14:10:58.731 -> >>> HomeKit: Got new client connection: 49
14:10:58.731 -> >>> HomeKit: [Client 49] Pair Setup 
14:10:58.731 -> >>> HomeKit: [Client 49] Pair Setup Step 1/3
14:10:58.731 -> >>> HomeKit: [Client 49] new pairing content
14:10:58.731 -> >>> HomeKit: started crypto
14:10:58.731 -> >>> HomeKit: Free heap: 106488
14:11:00.361 -> >>> HomeKit: Calculating public key len=384
14:11:01.203 -> >>> HomeKit: Calculating public key result 0
14:11:01.203 -> >>> HomeKit: [Client 49] send_tlv_response
14:11:01.203 -> >>> HomeKit: [Client 49] send_tlv_response done
14:11:07.590 -> >>> HomeKit: [Client 49] Pair Setup 
14:11:07.590 -> >>> HomeKit: [Client 49] Pair Setup Step 2/3
14:11:10.577 -> >>> HomeKit: [Client 49] Pair Setup 
14:11:10.577 -> >>> HomeKit: [Client 49] Pair Setup Step 3/3
14:11:10.577 -> [HAP]	Storage changed ... Success (File created) + (File written)
14:11:10.851 -> >>> HomeKit: Added pairing with 808FF924-3E08-4301-9626-58130226B6E1
14:11:10.892 -> >>> HomeKit: Configuring mDNS
14:11:10.892 -> >>> HomeKit: [Client 49] Successfully paired
14:11:10.970 -> >>> HomeKit: [Client 49] Closing client connection
14:11:11.015 -> >>> HomeKit: Got new client connection: 49
14:11:11.015 -> >>> HomeKit: [Client 49] Pair Verify Step 1/2
14:11:11.092 -> >>> HomeKit: [Client 49] Pair Verify Step 2/2
14:11:11.093 -> >>> HomeKit: [Client 49] Found pairing with 808FF924-3E08-4301-9626-58130226B6E1
14:11:11.093 -> >>> HomeKit: [Client 49] Verification successful, secure session established
14:11:11.125 -> >>> HomeKit: [Client 49] Get Accessories
14:11:11.388 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.422 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.422 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.465 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.465 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.465 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.465 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.497 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.497 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.497 -> >>> HomeKit: [Client 49] Update Characteristics
14:11:11.497 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.531 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.531 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.564 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.564 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.564 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.564 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.651 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.651 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.651 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.688 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.688 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.688 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.725 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.725 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.759 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.759 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.759 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.830 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.830 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.830 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.867 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.867 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.899 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.944 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.944 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.944 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:11.978 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:12.020 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:12.020 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:12.020 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:12.067 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:12.202 -> >>> HomeKit: [Client 49] Get Characteristics
14:11:17.428 -> >>> HomeKit: [Client 49] Closing client connection

What is supposed to engage a "Closing client connection" ?
Is this one of the functions contained in "arduino_homekit_server.cpp" file ?

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Tried with Core debug level set to VERBOSE : Nothing new :(
What I've tried :

1. Paired the device and all its accessories (with Base/Main accessory considered as a Bridge)
2. Once pairing ends, 5 seconds after last communication from iOS device to the ESP32, I get the infamous line : ">>> HomeKit: [Client 49] Closing client connection"
3. Rebooted the ESP32 and tried to send a command which did not worked at first, then I sent another and it worked.
4. Tried to send multiple commands subsequently without waiting until the 5 seconds : worked fine without any problem
5. Waited 5 seconds and got the message again : ">>> HomeKit: [Client 49] Closing client connection"

I just don't understand what is happening here ...

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Regarding 5. In my memory this is OK, Apple can close connection after paired. Than it should opened again. If it brings any trouble ?

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The infamous ">>> HomeKit: [Client 49] Closing client connection" absolutely doesn't happen when having only 3-5 accessories.
But as soon as we have 6/7 devices : it starts to show.

• Having 8 or more accessories initialized makes the UI on HomeKit recognizes the first one as a Hub/Bridge.

At some point, I may try the HomeSpan library just to see if it acts the same.

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@Yurik72 : Just te be sure of something, I tried to initialize as this :

• 1 main/Base accessory with 6 services
• 5 additional accessories

Everything working fine and got absolutely no closing connection message at some point ... even waiting for some minutes.
Instead, I get the "Get Characteristics" message showing up approximatively every minute :

• 14:36:54.761 -> >>> HomeKit: [Client 49] Get Characteristics
• 14:37:55.660 -> >>> HomeKit: [Client 49] Get Characteristics
• 14:38:56.683 -> >>> HomeKit: [Client 49] Get Characteristics
• 14:39:57.700 -> >>> HomeKit: [Client 49] Get Characteristics

This is definitely driving me crazy.

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Pretty sure it is this damn "bridge" thing that is enabling itself automatically at some point when using 8 accessories or more on the same device.
Any chance there is a parameter/function that avoids the device of being considered as a bridge ?

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@Yurik72 : Just te be sure of something, I tried to initialize as this :

• 1 main/Base accessory with 6 services
• 5 additional accessories

Everything working fine and got absolutely no closing connection message at some point ... even waiting for some minutes. Instead, I get the "Get Characteristics" message showing up approximatively every minute :

• 14:36:54.761 -> >>> HomeKit: [Client 49] Get Characteristics
• 14:37:55.660 -> >>> HomeKit: [Client 49] Get Characteristics
• 14:38:56.683 -> >>> HomeKit: [Client 49] Get Characteristics
• 14:39:57.700 -> >>> HomeKit: [Client 49] Get Characteristics

This is definitely driving me crazy.

FYI @Yurik72 : I've just tried with these settings and got it 100% working :

• 1 main/Base accessory with 2 services (strangely 1st one is not shown ... but I don't have the BRIDGE thing showing up this time on HomeKit UI on iOS device // pretty sure my initial problem root cause was the BRIDGE thing here being autodetected for an unknown reason)
• 9 additional accessories

STATUS >>> 100% working ... this is driving me nuts but I'll use it like that as ... so far it is the only working solution I have

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Interesting informations around the BRIDGE thing that might be helpful at some point :
isBridged | Apple Developer Documentation

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Well I can't understand some things here.

Did a lot of tests and here are some results :

• With 2 SERVICES on BASE ACCESSORY + 4 additionnal ACCESSORIES >>> IOS UI shows 2 ACCESSORIES on MAIN + 4 ACC >>> OK except first two are necessarily in the same room
• With 2 SERVICES on BASE ACCESSORY + 6 additionnal ACCESSORIES >>> IOS UI shows 2 ACCESSORIES on MAIN + 6 ACC >>> OK except first two are necessarily in the same room
• With 1 SERVICE on BASE ACCESSORY + 7 additionnal ACCESSORIES >>> IOS UI considers BRIDGE MODE, only 7 additionnal ACCESSORIES are available and can be separated into multiple rooms BUT the infamous "Closing client connection" happens
• With 0 SERVICE on BASE ACCESSORY + 7 additionnal ACCESSORIES >>> IOS UI does not show any HomeKit device at time of detection (before pairing)
• With 2 SERVICES on BASE ACCESSORY + 10 additionnal ACCESSORIES >>> IOS UI shows 2nd SERVICE on MAIN + 10 additionnal ACCESSORIES + no infamous "Closing client connection" after some seconds of idling + 1st SERVICE from BASE ACCESSORY is not shown at all
• With 2 SERVICES on BASE ACCESSORY + 14 additionnal ACCESSORIES >>> IOS UI considers BRIDGE MODE, no SERVICES from MAIN + 14 additionnal ACCESSORIES + Infamous "Closing client connection" happens after some seconds of idling

I'm considering modifying the library in order to be able to declare MAIN ACCESSORY unique SERVICE as a BRIDGE and then, initializing every single service as additionnal accessories.

@Yurik72 : What would be your advice here ? do you have any input on this situation ? Thanks

At time of initialization, I'm using :

hap_setbase_accessorytype(homekit_accessory_category_window_covering);
hap_initbase_accessory_service("HOSTNAME", "MANUFACTURER", "SERIALNUMBER", "MODEL", "FIRMWAREVERSION");
HomeKit_Svc_SVC0   = hap_add_windowcovering_service("SVC0",   HAP_SVC0_update,   0);
HomeKit_Svc_ACC2  = hap_add_windowcovering_as_accessory(homekit_accessory_category_window_covering, "ACC2",  HAP_ACC2_update,   0);

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