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Heat pump monitoring with BSB-LAN and Domoticz

Homemade solution for heat pump monitoring using the boiler-system-bus (BSB).

Hardware

Here is what we’ll use.

BSB Lan shield & ethernet shield on Arduino Mega (assembly)
BSB Lan shield & ethernet shield on Arduino Mega (assembly)

BSB Lan shield & ethernet shield on Arduino Mega (running)
BSB Lan shield & ethernet shield on Arduino Mega (running)

Wiring

BSB Lan wiring on the heatpump side
BSB Lan wiring on the heatpump side
BSB Lan wiring on the arduino side
BSB Lan wiring on the arduino side

Software

BSB LAN

For BSB LAN software installation, report to the https://1coderookie.github.io/BSB-LPB-LAN_EN/. Here is how I do it.

Arduino Software

Download and unzip the last Arduino software

wget https://downloads.arduino.cc/arduino-1.8.13-linux64.tar.xz
tar -xvf arduino-1.8.13-linux64.tar.xz

BSB Lan software

Download software

Take the last version supported by Arduino Mega. The new versions are based on a Arduino Due hardware, and won’t compile on Mega hardware.

Download and unzip the last version :

wget https://github.com/fredlcore/BSB-LAN/archive/refs/tags/v0.44.tar.gz
tar -xvzf v0.44.tar.gz 
mv BSB-LAN-0.44/ BSB_lan/

Configuration

cp BSB_lan/BSB_lan_config.h.default BSB_lan/BSB_lan_config.h

Edit the file

vim  BSB_lan/BSB_lan_config.h

Here is a diff that will show you what was modified in my setup. Note that you might leave fixed family / variant empty if you don’t know the value yet (know after the first run).

--- BSB_lan_config.h.default	2020-05-11 11:47:38.000000000 +0200
+++ BSB_lan_config.h	2021-05-06 23:30:59.937533915 +0200
@@ -13,7 +13,7 @@
 */
 
 #define Port 80
-#define IPAddr 192,168,178,88   // please note the commas instead of dots!!! Remove this line when you want DHCP
+//#define IPAddr 192,168,178,88   // please note the commas instead of dots!!! Remove this line when you want DHCP
 //#define GatewayIP 192,168,178,1 // Optional: this is usually your router's IP address. Please note the commas instead of dots!!!
 //#define DNSIP 192,168,178,1 // Only set this variable if your DNS server is different from your router's IP address (GatewayIP). Please note the commas instead of dots!!!
 //#define SubnetIP 255,255,255,0  // Please use commas insteaf of dots!!!
@@ -25,7 +25,7 @@
  * Incomplete languages will automagically be filled up with English translations first, and if no English translation
  * is available, fallback will take place to German. 
 */
-#define LANG DE
+#define LANG EN
 
 //#define WIFI  // activate if you are using an ESP8266 AT-firmware based WiFi module
 char ssid[] = "Your_WiFi_name_goes_here";            // your network SSID (name)
@@ -69,8 +69,8 @@
  * if autodetect does not work or heating system is not running when Arduino is powered on
  * You may use other device family numbers to test commands from other heating systems at your own risk
 */
-static const int fixed_device_family = 0;
-static const int fixed_device_variant = 0;
+static const int fixed_device_family = 211;
+static const int fixed_device_variant = 127;
 
 // Hide unknown parameters from web display (parameters will still be queried!)
 //#define HIDE_UNKNOWN
@@ -85,18 +85,18 @@
 
 // Create 24h averages from these parameters
 int avg_parameters[20] = {
-  8700,                   // Außentemperatur
-  8326                    // Brenner-Modulation
+//  8700,                   // Außentemperatur
+//  8326                    // Brenner-Modulation
 };
 
 /* activate logging on SD-card. Requires a FAT32-formatted Micro-SD card inserted into the Ethernet-Shield's card slot */
-#define LOGGER
+//#define LOGGER
 
 int log_parameters[20] = {
 //  30000,                  // Logging von "rohen" Bus-Datentelegrammen (macht nur als alleiniger Parameter Sinn)
-  8700,                   // Außentemperatur
-  8743,                   // Vorlauftemperatur
-  8314,                   // Rücklauftemperatur
+//  8700,                   // Außentemperatur
+//  8743,                   // Vorlauftemperatur
+//  8314,                   // Rücklauftemperatur
 //  20000,                  // Spezialparameter: Brenner-Laufzeit Stufe 1(/B)
 //  20001,                  // Spezialparameter: Brenner-Takte Stufe 1 (/B)
 //  20002,                  // Spezialparameter: Brenner-Laufzeit Stufe 2(/B)
@@ -123,28 +123,28 @@
 
 
 // Activate IPWE extension (http://xxx.xxx.xxx.xxx/ipwe.cgi)
-#define IPWE
+//#define IPWE
 
 // Parameters to be displayed in IPWE extension
 const int ipwe_parameters[] = {
-  8700,                   // Außentemperatur
-  8743,                   // Vorlauftemperatur
-  8314,                   // Rücklauftemperatur
-  8750,                   // Gebläsedrehzahl
-  8830,                   // Warmwassertemperatur
-  8740,                   // Raumtemperatur Ist
-  8741,                   // Raumtemperatur Soll
-  8326,                   // Brenner-Modulation
-  8337,                   // Startzähler Brenner
-  8703,                   // Aussentemperatur gedämpft
-  8704                    // Aussentemperatur gemischt
+//  8700,                   // Außentemperatur
+//  8743,                   // Vorlauftemperatur
+//  8314,                   // Rücklauftemperatur
+//  8750,                   // Gebläsedrehzahl
+//  8830,                   // Warmwassertemperatur
+//  8740,                   // Raumtemperatur Ist
+//  8741,                   // Raumtemperatur Soll
+//  8326,                   // Brenner-Modulation
+//  8337,                   // Startzähler Brenner
+//  8703,                   // Aussentemperatur gedämpft
+// 8704                    // Aussentemperatur gemischt
 };
 
 //#define MAX_CUL 192,168,178,5                  // IP of CUNO/CUNX/modified MAX!Cube
 
 const char max_device_list[] PROGMEM = {        // list of MAX! wall/heating thermostats that should be polled
-  "KEQ0502326"                                  // use MAX! serial numbers here which have to have exactly 10 characters
-  "KEQ0505080"
+//  "KEQ0502326"                                  // use MAX! serial numbers here which have to have exactly 10 characters
+//  "KEQ0505080"
 };
 
 // defines the number of retries for the query command
@@ -183,7 +183,7 @@
 byte monitor = 0;
 
 // defines default flag for parameters (use "#define DEFAULT_FLAG 0" to make (almost) all parameters writeable)
-#define DEFAULT_FLAG FL_RONLY
+#define DEFAULT_FLAG 0
 
 // include commands from BSB_lan_custom.h to be executed at the end of each main loop
 //#define CUSTOM_COMMANDS

Upload to Arduino

Plug the Arduino shield to the Linux server / computer.

dmesg

We see in the output that the Arduino is registered as ttyUSB1

[951926.625023] usb 3-9: new full-speed USB device number 5 using xhci_hcd
[951926.774097] usb 3-9: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.54
[951926.774103] usb 3-9: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[951926.774106] usb 3-9: Product: USB2.0-Serial
[951927.328531] usbcore: registered new interface driver ch341
[951927.328583] usbserial: USB Serial support registered for ch341-uart
[951927.328625] ch341 3-9:1.0: ch341-uart converter detected
[951927.329585] usb 3-9: ch341-uart converter now attached to ttyUSB0

Compile and upload :

Picked up JAVA_TOOL_OPTIONS: 
Loading configuration...
Initializing packages...
2021-05-06T20:35:08.627Z INFO c.a.u.n.HttpConnectionManager:153 [cc.arduino.packages.discoverers.serial.SerialDiscovery] Connect to https://builder.arduino.cc/builder/v1/boards/0x1A86/0x7523, method=GET, request id=97F18C2DDA684E0B
2021-05-06T20:35:09.251Z INFO c.a.u.n.HttpConnectionManager:157 [cc.arduino.packages.discoverers.serial.SerialDiscovery] Request complete URL="https://builder.arduino.cc/builder/v1/boards/0x1A86/0x7523", method=GET, response code=404, request id=97F18C2DDA684E0B, headers={null=[HTTP/1.1 404 Not Found], Cache-Control=[no-cache, no-store, must-revalidate], Server=[nginx], Connection=[keep-alive], Vary=[Origin], Pragma=[no-cache], Expires=[0], Content-Length=[0], Date=[Thu, 06 May 2021 20:35:09 GMT]}
2021-05-06T20:35:09.252Z WARN p.a.h.BoardCloudResolver:64 [cc.arduino.packages.discoverers.serial.SerialDiscovery] Fail to get the Vid Pid information from the builder response code=404
Preparing boards...
Verifying...
In file included from /home/ron/arduino-1.8.13/libraries/Ethernet/src/Dns.cpp:8:0:
/home/ron/arduino-1.8.13/libraries/Ethernet/src/Dns.cpp: In member function 'uint16_t DNSClient::BuildRequest(const char*)':
/home/ron/arduino-1.8.13/libraries/Ethernet/src/utility/w5100.h:457:25: warning: result of '(256 << 8)' requires 18 bits to represent, but 'int' only has 16 bits [-Wshift-overflow=]
 #define htons(x) ( (((x)<<8)&0xFF00) | (((x)>>8)&0xFF) )
                      ~~~^~~
/home/ron/arduino-1.8.13/libraries/Ethernet/src/Dns.cpp:164:18: note: in expansion of macro 'htons'
  twoByteBuffer = htons(QUERY_FLAG | OPCODE_STANDARD_QUERY | RECURSION_DESIRED_FLAG);
                  ^~~~~
Sketch uses 208252 bytes (82%) of program storage space. Maximum is 253952 bytes.
Global variables use 2937 bytes (35%) of dynamic memory, leaving 5255 bytes for local variables. Maximum is 8192 bytes.
Uploading...

Then open a browser and go to the device homepage, and click on “check new parameters”. You should see something close to :

BSB lan check new parameters
BSB lan check new parameters

Domoticz

Under domoticz, create a new hardware such as the PAC below :

BSB lan configuration with Domoticz : creation of hardware device
BSB lan configuration with Domoticz : creation of hardware device

Then create as much as devices you would like to monitor, here is what I’ve done :

BSB lan configuration with Domoticz : creation of devices
BSB lan configuration with Domoticz : creation of devices

Then go to setup > more options > events and create a new script such as the one below :

Circuit_Status = {}
Circuit_Status[0]='---'
Circuit_Status[3]='Gardien adressé'
Circuit_Status[4]='mode manuel actif'
Circuit_Status[17]='Dépassement actif'
Circuit_Status[22]='Protection antigel du système active'
Circuit_Status[23]='Protection antigel active'
Circuit_Status[24]='Désactivé'
Circuit_Status[56]='Protection contre la surchauffe active'
Circuit_Status[101]='Protection antigel de la pièce active'
Circuit_Status[102]='fonction de chape active'
Circuit_Status[103]='Protection limitée de la chaudière'
Circuit_Status[104]='Restreint, priorité ECS'
Circuit_Status[105]='Limité, tampon'
Circuit_Status[106]='opération de chauffage restreinte'
Circuit_Status[107]='Tampon d\'acceptation forcée'
Circuit_Status[108]='TWW d\'acceptation forcée'
Circuit_Status[109]='Acceptation forcée des producteurs'
Circuit_Status[110]='Acceptation forcée'
Circuit_Status[111]='option de mise en marche + chauffage rapide'
Circuit_Status[112]='Optimisation de démarrage'
Circuit_Status[113]='chauffage rapide'
Circuit_Status[114]='Mode de chauffage confort'
Circuit_Status[115]='optimisation de l\'arrêt'
Circuit_Status[116]='Fonctionnement en chauffage réduit'
Circuit_Status[117]='Protection antigel active'
Circuit_Status[118]='Mode été'
Circuit_Status[119]='Eco quotidien actif'
Circuit_Status[120]='Réduction réduite'
Circuit_Status[121]='Protection antigel inférieure'
Circuit_Status[122]='Limite de température ambiante'
Circuit_Status[255]='Indéfini'

ECS_Status = {}
ECS_Status [0] = '---'
ECS_Status [3] = 'Gardien adressé'
ECS_Status [4] = 'Mode manuel actif'
ECS_Status [17] = 'Dépassement actif'
ECS_Status [24] = 'Protection antigel active'
ECS_Status [25] = 'Off'
ECS_Status [53] = 'Refroidissement actif'
ECS_Status [66] = 'Charge utilisation électrique'
ECS_Status [67] = 'Charge forcée active'
ECS_Status [69] = 'Charge active'
ECS_Status [70] = 'Loaded, Max Storage Temp'
ECS_Status [71] = 'Loaded, Max Charge Temp'
ECS_Status [75] = 'Chargé'
ECS_Status [77] = 'recooling via collector'
ECS_Status [78] = 'recooling via ore / Hk\'s'
ECS_Status [79] = 'Protection de décharge active'
ECS_Status [80] = 'Limite de temps de charge active'
ECS_Status [81] = 'chargement bloqué'
ECS_Status [82] = 'Verrouillage de charge activé'
ECS_Status [83] = 'Force, temp max de stockage'
ECS_Status [84] = 'Force, température de charge max'
ECS_Status [85] = 'Coercition, Legionella setpoint'
ECS_Status [86] = 'Point de consigne nominal forcé'
ECS_Status [87] = 'Charge électrique, consigne de jambe'
ECS_Status [88] = 'Charge électrique, consigne nominale'
ECS_Status [89] = 'Charge électrique, consigne de Red'
ECS_Status [90] = 'Charge électrique, consigne Fros'
ECS_Status [91] = 'Utilisation électrique libérée'
ECS_Status [92] = 'Poussée, consigne de légionelle'
ECS_Status [93] = 'Push, consigne nominale'
ECS_Status [94] = 'Push active'
ECS_Status [95] = 'Charge, consigne légionelle'
ECS_Status [96] = 'Charge, consigne nominale'
ECS_Status [97] = 'Charge, consigne réduite'
ECS_Status [98] = 'Chargé, température legio'
ECS_Status [99] = 'Chargé, température nominale'
ECS_Status [100] = 'Chargé, température réduite'
ECS_Status [199] = 'opération de tapotement'
ECS_Status [200] = 'Prêt'
ECS_Status [201] = 'frais de veille'
ECS_Status [255] = 'Indéfini'

PAC_Status = {}
PAC_Status [0] = '---'
PAC_Status [2] = 'faute'
PAC_Status [10] = 'Verrouillé'
PAC_Status [17] = 'Dépassement actif'
PAC_Status [23] = 'Protection antigel du système active'
PAC_Status [24] = 'Protection antigel active'
PAC_Status [25] = 'Désactivé'
PAC_Status [26] = 'opération d\'urgence'
PAC_Status [27] = 'Verrouillé, externe'
PAC_Status [29] = 'HD avec opération WP'
PAC_Status [30] = 'moniteur de débit'
PAC_Status [31] = 'Pressostat'
PAC_Status [32] = 'Bienvenue compresseur de gaz chaud 1'
PAC_Status [33] = 'Bienvenue compresseur de gaz chaud 2'
PAC_Status [34] = 'Temp max de coupure limite'
PAC_Status [35] = 'Temps d\'arrêt min actif'
PAC_Status [36] = 'Compenser la chaleur excessive'
PAC_Status [37] = 'Temps de limitation actif'
PAC_Status [38] = 'Durée d\'exécution min active'
PAC_Status [39] = 'Compensation du déficit thermique'
PAC_Status [40] = 'Limite propagation condensée max'
PAC_Status [41] = 'Limite propagation condition min.'
PAC_Status [42] = 'Limite spread Verda Max'
PAC_Status [43] = 'Écart limite Verda Min'
PAC_Status [44] = 'compresseur et marche électrique'
PAC_Status [45] = 'Compresseur 1 et 2 activés'
PAC_Status [46] = 'compresseur 1 activé'
PAC_Status [47] = 'Compressor 2 on'
PAC_Status [48] = 'Pompe à chaleur antigel'
PAC_Status [49] = 'Exécution préliminaire active'
PAC_Status [50] = 'Libéré, Verd Verd prêt'
PAC_Status [51] = 'Aucune demande'
PAC_Status [125] = 'dégivrage actif'
PAC_Status [126] = 'drain'
PAC_Status [127] = 'Mode de refroidissement actif'
PAC_Status [128] = 'Mode de refroidissement passif'
PAC_Status [129] = 'Refroidissement de l\'évaporateur'
PAC_Status [130] = 'préchauffage pour dégivrage'
PAC_Status [137] = 'mode de chauffage'
PAC_Status [139] = 'Temp. Arrêt limite. Min '
PAC_Status [145] = 'Freeze out max max cooling'
PAC_Status [176] = 'Verrouillé, température extérieure'
PAC_Status [180] = 'courant triphasé asymétrique'
PAC_Status [181] = 'basse pression'
PAC_Status [182] = 'Surcharge du ventilateur'
PAC_Status [183] = 'Surcharge du compresseur 1'
PAC_Status [184] = 'Surcharge du compresseur 2'
PAC_Status [185] = 'Surcharge de la pompe source'
PAC_Status [186] = 'moniteur de flux de consommateurs'
PAC_Status [187] = 'TA Limite d\'utilisation min'
PAC_Status [188] = 'Limite opérationnelle TA max'
PAC_Status [189] = 'Limiter la température de la source min eau'
PAC_Status [190] = 'Semelle Min Temp Temp Gre'
PAC_Status [191] = 'Limit Temp Temp Source Max'
PAC_Status [192] = 'Compresseur à dégivrage forcé'
PAC_Status [193] = 'Dégivrage du ventilateur'
PAC_Status [194] = 'Dégivrage avec un compresseur'
PAC_Status [195] = 'Dégivrage avec ventilateur'
PAC_Status [196] = 'Limite temp mini source refroidissement'
PAC_Status [197] = 'Electric On'
PAC_Status [198] = 'Ferme biologique verrouillée'
PAC_Status [207] = 'Durée de fonctionnement min active, refroidissement'
PAC_Status [208] = '1 et 2 allumés, opération de refroidissement '
PAC_Status [209] = 'Compresseur 1 en marche, opération de refroidissement'
PAC_Status [210] = 'Compresseur 2 allumé, opération de refroidissement'
PAC_Status [235] = 'Pression d\'eau trop basse'
PAC_Status [242] = 'Réallocation active'
PAC_Status [246] = 'Sous-tension secteur'
PAC_Status [254] = 'Pomper le réfrigérant, manuellement'
PAC_Status [256] = 'Pomper le réfrigérant'
PAC_Status [257] = 'Délai de démarrage du dégivrage'
PAC_Status [258] = 'Compresseur bloqué'
PAC_Status [259] = 'Verrouillé, température source max'
PAC_Status [260] = 'Verrouillé, température source min'
PAC_Status [261] = 'Verrouillé, temp de retour max'
PAC_Status [262] = 'Verrouillé, temp de retour min'
PAC_Status [263] = 'Verrouillé, température de départ max'
PAC_Status [264] = 'Verrouillé, temp de débit min'
PAC_Status [265] = 'Verrouillé, température de condensation max'
PAC_Status [266] = 'Verrouillé, température d\'évaporation min'
PAC_Status [267] = 'Verrouillé, Heissgastemp Max'
PAC_Status [268] = 'Limiter la température d\'évaporation min'
PAC_Status [269] = 'Limit temp de condensation max'
PAC_Status [270] = 'Limite de la température d\'évaporation maximale'

return {
	on = {
		timer = {
			'every minute' -- just an example to trigger the request
		},
		httpResponses = {
			'trigger' -- must match with the callback passed to the openURL command
		}
	},
	execute = function(domoticz, item)

		if (item.isTimer) then
			domoticz.openURL({

				url = 'http://192.168.1.20/JQ=8000,8001,8003,8006,8397,8410,8411,8412,8413,8425,8700,8740,8741,8770,8771,8773,8830,9031,9032,9033,9034,9035,9071,9072,9073',
				method = 'GET',
				callback = 'trigger', -- see httpResponses above.
			})
		end

		if (item.isHTTPResponse) then
			if (item.statusCode == 200) then
				if (item.isJSON) then
                    
                    domoticz.devices('PAC - Etat circuit 1').updateCustomSensor(item.json["8000"].value)
				    if(domoticz.devices('PAC - Etat circuit 1 (statut)').state~=Circuit_Status[tonumber(item.json["8000"].value)]) then
				        domoticz.devices('PAC - Etat circuit 1 (statut)').updateText(Circuit_Status[tonumber(item.json["8000"].value)])
				    end
				    
				    domoticz.devices('PAC - Etat circuit 2').updateCustomSensor(item.json["8001"].value)
				    if(domoticz.devices('PAC - Etat circuit 2 (statut)').state~=Circuit_Status[tonumber(item.json["8001"].value)]) then
				        domoticz.devices('PAC - Etat circuit 2 (statut)').updateText(Circuit_Status[tonumber(item.json["8001"].value)])
				    end
				    
				    domoticz.devices('PAC - Etat ECS').updateCustomSensor(item.json["8003"].value)
				    if(domoticz.devices('PAC - Etat ECS (statut)').state~=ECS_Status[tonumber(item.json["8003"].value)]) then
				        domoticz.devices('PAC - Etat ECS (statut)').updateText(ECS_Status[tonumber(item.json["8003"].value)])
				    end
				    
				    domoticz.devices('PAC - Etat').updateCustomSensor(item.json["8006"].value)
				    if(domoticz.devices('PAC - Etat (statut)').state~=PAC_Status[tonumber(item.json["8006"].value)]) then
				        domoticz.devices('PAC - Etat (statut)').updateText(PAC_Status[tonumber(item.json["8006"].value)])
				    end

                    domoticz.devices('PAC - Conso').updateEnergy(tonumber(item.json["8397"].value)) 
                    domoticz.devices('PAC - Température retour').updateTemperature(tonumber(item.json["8410"].value))
                    domoticz.devices('PAC - Température départ (consigne)').updateTemperature(tonumber(item.json["8411"].value))
                    domoticz.devices('PAC - Température départ').updateTemperature(tonumber(item.json["8412"].value))
                    domoticz.devices('PAC - Modulation compresseur').updatePercentage(tonumber(item.json["8413"].value))
                    domoticz.devices('PAC - Température condensateur').updateTemperature(tonumber(item.json["8425"].value))
                    domoticz.devices('Température extérieure').updateTemperature(tonumber(item.json["8700"].value))
                    domoticz.devices('Température RDC').updateTemperature(tonumber(item.json["8740"].value))
                    domoticz.devices('Thermostat RDC').updateSetPoint(tonumber(item.json["8741"].value))
                    domoticz.devices('Température étage').updateTemperature(tonumber(item.json["8770"].value))
                    domoticz.devices('Thermostat étage').updateSetPoint(tonumber(item.json["8771"].value))
                    domoticz.devices('PAC - Température départ 2').updateTemperature(tonumber(item.json["8773"].value))
                    domoticz.devices('PAC - Température ECS	').updateTemperature(tonumber(item.json["8830"].value))
                    
                    domoticz.devices('PAC - Circulateur étage').updateCustomSensor(tonumber(item.json["9073"].value)/255)
                    domoticz.devices('PAC - Appoint elect chauffage').updateCustomSensor(item.json["9032"].value)


                    domoticz.devices('PAC - Vanne direct. ECS').updateCustomSensor(tonumber(item.json["9034"].value)/255)
                    
                    domoticz.devices('PAC - Appoint elect ECS').updateCustomSensor(item.json["9035"].value)
                    if (item.json["9071"].value == '255') then
                        --Ouverte
                        domoticz.devices('PAC - Vanne mélangeuse').updateCustomSensor(1)
                    elseif (item.json["9072"].value == '255') then
                        --Fermée
                        domoticz.devices('PAC - Vanne mélangeuse').updateCustomSensor(0)
                    else
                        --copie état précédent
                        domoticz.devices('PAC - Vanne mélangeuse').updateCustomSensor(domoticz.devices('PAC - Vanne mélangeuse').state)
                    end
                    domoticz.devices('PAC - Circulateur RDC / ECS').updateCustomSensor(tonumber(item.json["9031"].value)/255)   
				end
			else
				domoticz.log('There was a problem handling the request', domoticz.LOG_ERROR)
				domoticz.log(item, domoticz.LOG_ERROR)
			end

		end

	end
}

And you can create a floorplan from the heat pump documentation:

Animated PID of heating pump with domoticz and BSB LAN
Animated PID of heating pump with domoticz and BSB LAN

And of course graph data :

Custom temperature graph of heating pump with domoticz and BSB LAN
Custom temperature graph of heating pump with domoticz and BSB LAN

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