Hawe more board with bgx13p / st32m ( wallbox charger ) 

On first board
with firmware bgx13p not work with android 11 ( work on android 5.2 to 10 but not 11 ); on IOS no problem... 

On second board 
I updated firmware of bgx13p to new version 1.2.2738.2 with android 11 it works.
then i downgraded to version 1.2.2376.1 and it works.

in Android not use BGX sdk but write more code for connect and comunicate.
1. scan ble                Android 11 OK  Android >= 10 OK
2. connect ble.         Android 11 OK  Android >= 10 OK 
3. discover service  Android 11 OK  Android >= 10 OK 
4. discover charac.  Android 11 OK  Android >= 10 OK 
5. set listener           Android 11 OK. Android >= 10 OK 
6. write.                     Android 11 ??????????????????????? 
 

2021-04-12 14:41:40.071 3527-3527/it.fca.myeasywallbox I/easyWallbox: Configurazione device : 84:71:27:9D:F6:D7
2021-04-12 14:41:40.079 3527-3527/it.fca.myeasywallbox D/BluetoothGatt: connect() - device: 84:71:27:9D:F6:D7, auto: false
2021-04-12 14:41:40.079 3527-3527/it.fca.myeasywallbox D/BluetoothGatt: registerApp()
2021-04-12 14:41:40.079 3527-3527/it.fca.myeasywallbox D/BluetoothGatt: registerApp() - UUID=df09c9f2-b927-4e2c-84df-d96335de6df4
2021-04-12 14:41:40.080 3527-3527/it.fca.myeasywallbox I/easyWallbox: Bt sta connettendo 
2021-04-12 14:41:40.081 3527-3569/it.fca.myeasywallbox D/BluetoothGatt: onClientRegistered() - status=0 clientIf=7
2021-04-12 14:41:40.215 3527-3569/it.fca.myeasywallbox D/BluetoothGatt: onClientConnectionState() - status=0 clientIf=7 device=84:71:27:9D:F6:D7
2021-04-12 14:41:40.718 3527-3527/it.fca.myeasywallbox D/BluetoothGatt: discoverServices() - device: 84:71:27:9D:F6:D7
2021-04-12 14:41:40.732 3527-3569/it.fca.myeasywallbox D/BluetoothGatt: onSearchComplete() = Device=84:71:27:9D:F6:D7 Status=0
2021-04-12 14:41:40.744 3527-3527/it.fca.myeasywallbox I/easyWallbox: Bt connesso 
2021-04-12 14:41:40.744 3527-3527/it.fca.myeasywallbox I/easyWallbox: Service : 00001801-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.745 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002a05-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.745 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002b2a-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.747 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002b29-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.747 3527-3527/it.fca.myeasywallbox I/easyWallbox: Bt connesso 
2021-04-12 14:41:40.747 3527-3527/it.fca.myeasywallbox I/easyWallbox: Service : 00001800-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.748 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002a00-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.748 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002a01-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.748 3527-3527/it.fca.myeasywallbox I/easyWallbox: Bt connesso 
2021-04-12 14:41:40.748 3527-3527/it.fca.myeasywallbox I/easyWallbox: Service : 0000180a-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.749 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002a29-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.749 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002a24-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.750 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 00002a26-0000-1000-8000-00805f9b34fb
2021-04-12 14:41:40.750 3527-3527/it.fca.myeasywallbox I/easyWallbox: Bt connesso 
2021-04-12 14:41:40.750 3527-3527/it.fca.myeasywallbox I/easyWallbox: Service : 331a36f5-2459-45ea-9d95-6142f0c4b307
2021-04-12 14:41:40.750 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : a9da6040-0823-4995-94ec-9ce41ca28833
2021-04-12 14:41:40.751 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : a73e9a10-628f-4494-a099-12efaf72258f
2021-04-12 14:41:40.751 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 75a9f022-af03-4e41-b4bc-9de90a47d50b
2021-04-12 14:41:40.751 3527-3527/it.fca.myeasywallbox I/easyWallbox: Bt connesso 
2021-04-12 14:41:40.751 3527-3527/it.fca.myeasywallbox I/easyWallbox: Service : 169b52a0-b7fd-40da-998c-dd9238327e55
2021-04-12 14:41:40.752 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 902ee692-6ef9-48a8-a430-5212eeb3e5a2
2021-04-12 14:41:40.752 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 503a5d70-b443-466e-9aeb-c342802b184e
2021-04-12 14:41:40.752 3527-3527/it.fca.myeasywallbox I/easyWallbox:    Characteristic : 12e868e7-c926-4906-96c8-a7ee81d4b1b3
2021-04-12 14:41:40.753 3527-3592/it.fca.myeasywallbox I/easyWallbox: Impostazioni: Abilito indicate TX 
2021-04-12 14:41:40.762 3527-3592/it.fca.myeasywallbox D/BluetoothGatt: setCharacteristicNotification() - uuid: a73e9a10-628f-4494-a099-12efaf72258f enable: true
2021-04-12 14:41:41.378 3527-3527/it.fca.myeasywallbox I/easyWallbox: Abilito RX 
2021-04-12 14:41:41.379 3527-3592/it.fca.myeasywallbox I/easyWallbox: Impostazioni: Abilito la notifica ST ( canale per busmode )
2021-04-12 14:41:41.387 3527-3592/it.fca.myeasywallbox D/BluetoothGatt: setCharacteristicNotification() - uuid: 75a9f022-af03-4e41-b4bc-9de90a47d50b enable: true
2021-04-12 14:41:41.467 3527-3592/it.fca.myeasywallbox I/easyWallbox: Impostazioni : richiesta/modifica MTU
2021-04-12 14:41:41.473 3527-3592/it.fca.myeasywallbox D/BluetoothGatt: configureMTU() - device: 84:71:27:9D:F6:D7 mtu: 250
2021-04-12 14:41:41.554 3527-3569/it.fca.myeasywallbox D/BluetoothGatt: onConfigureMTU() - Device=84:71:27:9D:F6:D7 mtu=250 status=0
2021-04-12 14:41:41.556 3527-3527/it.fca.myeasywallbox I/easyWallbox: Set Mtu: 250
2021-04-12 14:41:41.692 3527-3527/it.fca.myeasywallbox I/easyWallbox: Scrivo: $BLE,AUTH,4566
2021-04-12 14:41:41.780 3527-3569/it.fca.myeasywallbox D/BluetoothGatt: onConnectionUpdated() - Device=84:71:27:9D:F6:D7 interval=12 latency=0 timeout=400 status=0
2021-04-12 14:41:42.724 3527-3593/it.fca.myeasywallbox V/FA: Inactivity, disconnecting from the service
2021-04-12 14:41:45.008 3527-3527/it.fca.myeasywallbox I/easyWallbox: Ricevo : $BLE,AUTH,OK
2021-04-12 14:41:45.053 3527-3527/it.fca.myeasywallbox I/easyWallbox: Scrivo: $DATA,READ,AD

this log on Android 10 ... 9 ... 8 ... 7 ... 6 .. 5 

on android 11 stops afrer 1^ 'Scrivo' command (on write to characteristic).
Important not use FASTACK; not use ble PHY for the moment

We wants an application that can be used from android 5 to android 11 
At moment from api 21 to 29 works fine ( BGX13P v21 or v31 ) 
In api 30, pair, read service and characteristic, change MTU but when I try to write it is as if the data has not been sent.

I could also send you a log, but in this case it is not easy to understand.

We use the bgx13p (v21 / v31) connected to st32m via serial.
With the previous firmware (1.0.927.2) everything worked fine in both IOS and Android (even version 11) although we had to write practically the entire library to make our app work on android from SDK 21 (android 5) with sdk bgx was not possible. 
We have now updated the firmware to version 1.2.2376.1. 
No problem with IOS but instead with android 11 it doesn't really want to send (write) any data. 
Is this a known problem? has any of you already been able to solve the problem?

Thank you in advance for all the help you can give me

I'm writing an application in ios that uses a card with your BGX13P on board.

All perfect! except one thing.
When the device for various reasons switches off and then on again, the BGXpress sdk manages to reconnect immediately ... pity that they are no longer able to send and receive data with busmode streaming.
I tried delgating the device again and changing busmode but without success ... Suggestions for me?

Place a piece of code that manages the connection:

// MARK: - connection management delegate
    func stateChanged (fordevice: BGXDevice) {
        print("Device state changed: \(BGXDevice.name(for: selecteddevice?.deviceState ?? .Interrogating))")
        
        if device.deviceState == .Connected {
            currentwallbox?.connected = true
            busModeChanged(STREAM_MODE, for: device)
            self.selecteddevice = device
            self.selecteddevice?.deviceDelegate = self
            self.selecteddevice?.serialDelegate = self
            if currentwallbox?.timestamp == 0 {
                executequestion(currentwallbox!, MON_SV)
            }
        } else {
            currentwallbox?.connected = false
        }
    }

I'm writing an application in ios that uses a card with your BGX13P on board.

All perfect! except one thing.
When the device for various reasons switches off and then on again, the BGXpress sdk manages to reconnect immediately ... pity that they are no longer able to send and receive data with busmode streaming.
I tried delgating the device again and changing busmode but without success ... Suggestions for me?

Place a piece of code that manages the connection:

// MARK: - connection management delegate
    func stateChanged (for device: BGXDevice) {
        print ("Device state changed: \ (BGXDevice.name (for: selecteddevice? .deviceState ?? .Interrogating))")
        
        if device.deviceState == .Connected {
            currentwallbox? .connected = true
            busModeChanged (STREAM_MODE, for: device)
            self.selecteddevice = device
            self.selecteddevice? .deviceDelegate = self
            self.selecteddevice? .serialDelegate = self
            if currentwallbox? .timestamp == 0 {
                executequestion (currentwallbox !, MON_SV)
            }
        } else {
            currentwallbox? .connected = false
        }
    }