diff --git a/epics/README.md b/epics/README.md
index b943dae..0e8498e 100644
--- a/epics/README.md
+++ b/epics/README.md
@@ -120,7 +120,8 @@ Process Value in this IOC Server:
 - Main State Machine, see [source](https://git.ipfn.tecnico.ulisboa.pt/blob/ISTTOK.git/master/epics%2Fiocs%2FISTTOKrpi%2FISTTOKrpiApp%2Fsrc%2FIsttokSeqExec.stt)
 
 #### Hardware Platform
-1. A Raspberry Pi 3, running a linux distribution..
+1. A Raspberry Pi  running a linux distribution..
+  * Raspberry Pi 2 Model B Rev 1.1 hardware. `# cat /proc/cpuinfo | grep Model`
   * Has a USB/RS485 port for monitoring pressure (to be connected soon)  
 2. Two Interface Boards, Velleman Model [k8000](https://www.velleman.eu/products/view/?id=9383)..
   * connected to raspberry Pi through I2C interface;
@@ -136,7 +137,7 @@ Process Value in this IOC Server:
   * IP addr:192.168.1.110 ( ISTTOK private network)
   * NTP/timedatectl time conected to  IPFN Gps NTP/PPS server IP:10.136.227.237 193.136.136.129 
     (this is mandatory, Rpi does not have a Real Time clock    see https://www.raspberrypi.org/forums/viewtopic.php?t=178763)
-  * EPICS v. base-7.0 from epics [github](https://github.com/epics-base/)
+  * EPICS v7 base-7.0 from epics [github](https://github.com/epics-base)
     * (in /home/pi/Apps/epics7/epics-base) including modules:
     * asynDriver [asyn](https://github.com/epics-modules/asyn)
     * [StreamDevice](https://paulscherrerinstitute.github.io/StreamDevice)
@@ -240,6 +241,13 @@ Process Variables in this IOC Server:
 |ISTTOK:central:TMPump1-PressureAdmission | ai | yes | out "0030074002=?108" |
 ----------
 
+* Connected to [Seeeduino](https://wiki.seeedstudio.com/Grove-4-Channel_SPDT_Relay)
+Grove - 4-Channel SPDT Relay  Address = 17
+
+|PV Name	| PV Type	| Bit | Relay NO/NC|
+|:----------|-------|---:|
+|ISTTOK:central:GasIS-Valves| bo | 0 | NO |
+
 
 ### Vacuum Node (**Not used, backup server only**)
 - Vacuum Pfeiffer Sensors (RS485)
diff --git a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/ISTTOKmachineControl.db b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/ISTTOKmachineControl.db
index 3d51a03..220f6e3 100644
--- a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/ISTTOKmachineControl.db
+++ b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/ISTTOKmachineControl.db
@@ -401,10 +401,10 @@ record(bo, "$(P)$(R)Clean-PrimPneuBreaker"){
 record(bo, "$(P)$(R)GasIS-Valves" ) {
 #   field(DESC," 2 válvulas pneumáticas de corte do sistema de injecção de H/D/Ne/He no TOK, 24V out = deixa passar")
 #   record(bo, "$(P)$(R)GISValvesOnOff" ) {
-    field( OUT, "$(P)$(R)PCF8574:61:REGISTER.B6 PP" )
-        field( ZNAM, "On" )
-        field( ONAM, "Off" )
-        field(VAL,"1")
+    field( OUT, "$(P)$(R)SEEED4RELAY:17:REGISTER.B0 PP" )
+        field( ZNAM, "OFF" )
+        field( ONAM, "ON" )
+        field(VAL,"0")
 }
 
 ##########################################
diff --git a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/Makefile b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/Makefile
index 642dba3..a6074c5 100644
--- a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/Makefile
+++ b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/Makefile
@@ -11,11 +11,13 @@ DB += ISTTOKpcf8591.db
 DB += ISTTOKpfeiffer.db
 DB += ISTTOKtda8444.db
 DB += sendmail.db
+DB += seeed4relay.db
 DB += pcf8591.proto
 DB += tda8444.proto
 DB += sendmail.proto
 DB += pcf8574.proto
 DB += pfeiffer.proto
+DB += seeed4relay.proto
 
 # If <anyname>.db template is not named <anyname>*.template add
 # <anyname>_TEMPLATE = <templatename>
diff --git a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/seeed4relay.db b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/seeed4relay.db
new file mode 100644
index 0000000..463d463
--- /dev/null
+++ b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/seeed4relay.db
@@ -0,0 +1,19 @@
+##############################################################
+# ### Read/Write SEEED Relay Board address 0x11=17 register ##
+#############################################################
+record( mbboDirect, "$(P)$(R)SEEED4RELAY:$(A):REGISTER") {
+#record(longout, "$(P)$(R)SEEED4RELAY:$(A):REGISTER") {
+    field(DTYP, "stream")
+    field(OUT,  "@seeed4relay.proto wReg($(A)) I2C")
+#    field(DRVH, "15" )
+#    field(DRVL, "0" )
+    field(SHFT, "0")
+    field(NOBT, "4")
+    field(VAL, 0)
+#    field(PINI,"YES")
+}
+record( mbbiDirect, "$(P)$(R)SEEED4RELAY:$(A):REGISTER:READ") {
+    field(DTYP, "stream")
+    field(INP,  "@seeed4relay.proto rReg($(A)) I2C")
+}
+
diff --git a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/seeed4relay.proto b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/seeed4relay.proto
new file mode 100644
index 0000000..0749574
--- /dev/null
+++ b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/Db/seeed4relay.proto
@@ -0,0 +1,29 @@
+Terminator   = "";
+LockTimeout  = 500;
+ReplyTimeout = 100;
+ReadTimeout  = 100;
+WriteTimeout = 100;
+MaxInput     = 1;
+ExtraInput   = Error;
+
+#define CMD_CHANNEL_CTRL        0x10
+#define CMD_SAVE_I2C_ADDR       0x11
+#define CMD_READ_I2C_ADDR       0x12
+#define CMD_READ_FIRMWARE_VER   0x13
+
+rReg {
+  out ${1} 16;
+  in  "%01r";
+}
+
+rFw {
+  out ${1} 18;
+  in  "%01r";
+}
+##  @init { rReg; }
+##
+wReg {
+  out ${1} 16 "%.1r";
+}
+
+#  @init { out ${1}; in "%.1r"; }
diff --git a/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/pvList.txt b/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/pvList.txt
index 5b503db..23cfce1 100644
--- a/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/pvList.txt
+++ b/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/pvList.txt
@@ -1,3 +1,88 @@
+ISTTOK:central:PCF8591:72:ADC_CH1
+ISTTOK:central:PCF8591:72:ADC_CH2
+ISTTOK:central:PCF8591:72:ADC_CH3
+ISTTOK:central:P001:M
+ISTTOK:central:P001:E
+ISTTOK:central:P002:M
+ISTTOK:central:P002:E
+ISTTOK:central:P003:M
+ISTTOK:central:P003:E
+ISTTOK:central:P004:M
+ISTTOK:central:P004:E
+ISTTOK:central:OPCALCSTATE
+ISTTOK:central:STARTCALCSTATE
+ISTTOK:central:STOPPINGCALCSTATE
+ISTTOK:central:CLEANCALCSTATE
+ISTTOK:central:WSHOTCALCSTATE
+ISTTOK:central:PULSE-NUMBER
+ISTTOK:central:COUNTDOWN
+ISTTOK:central:COUNTER
+ISTTOK:central:PCF8591:72:BYTE2_CH1
+ISTTOK:central:PCF8591:72:BYTE2_CH2
+ISTTOK:central:PCF8591:72:BYTE2_CH3
+ISTTOK:central:Emergency
+ISTTOK:central:VVessel-Pressure
+ISTTOK:central:RPump1-Pressure
+ISTTOK:central:TMPump1-PressureAdmission
+ISTTOK:central:RPump2-Pressure
+ISTTOK:central:PCF8591:72:DAC
+ISTTOK:central:TDA8444:32:DAC_CH0
+ISTTOK:central:TDA8444:32:DAC_CH1
+ISTTOK:central:TDA8444:32:DAC_CH2
+ISTTOK:central:TDA8444:32:DAC_CH3
+ISTTOK:central:TDA8444:32:DAC_CH4
+ISTTOK:central:TDA8444:32:DAC_CH5
+ISTTOK:central:TDA8444:32:DAC_CH6
+ISTTOK:central:Shot-TorPSCurrent
+ISTTOK:SR_0_State
+ISTTOK:SR_1_State
+ISTTOK:SR_2_State
+ISTTOK:SR_3_State
+ISTTOK:SR_4_State
+ISTTOK:SR_5_State
+ISTTOK:SR_6_State
+ISTTOK:SR_7_State
+ISTTOK:SR_disableMaxSecs
+ISTTOK:central:PCF8574:56:REGISTER:READ:FNOUT
+ISTTOK:central:PCF8574:57:REGISTER:READ:FNOUT
+ISTTOK:central:TraceMessage
+ISTTOK:central:LogMessage
+ISTTOK:central:RS485Debug
+ISTTOK:central:sendmail
+ISTTOK:SR_recentlyStr
+ISTTOK:SR_rebootStatusStr
+ISTTOK:SR_rebootTime
+ISTTOK:SR_statusStr
+ISTTOK:SR_0_Name
+ISTTOK:SR_0_StatusStr
+ISTTOK:SR_0_Time
+ISTTOK:SR_1_Name
+ISTTOK:SR_1_StatusStr
+ISTTOK:SR_1_Time
+ISTTOK:SR_2_Name
+ISTTOK:SR_2_StatusStr
+ISTTOK:SR_2_Time
+ISTTOK:SR_3_Name
+ISTTOK:SR_3_StatusStr
+ISTTOK:SR_3_Time
+ISTTOK:SR_4_Name
+ISTTOK:SR_4_StatusStr
+ISTTOK:SR_4_Time
+ISTTOK:SR_5_Name
+ISTTOK:SR_5_StatusStr
+ISTTOK:SR_5_Time
+ISTTOK:SR_6_Name
+ISTTOK:SR_6_StatusStr
+ISTTOK:SR_6_Time
+ISTTOK:SR_7_Name
+ISTTOK:SR_7_StatusStr
+ISTTOK:SR_7_Time
+ISTTOK:central:TMPump1-ControllerOnInv
+ISTTOK:central:TMPump1-ControllerOffInv
+ISTTOK:central:TMPump1-MotorOnInv
+ISTTOK:central:TMPump1-MotorOffInv
+ISTTOK:central:BuzzerInv
+ISTTOK:central:Shot-TorPSTriggerInv
 ISTTOK:central:TMPump1-Power
 ISTTOK:central:TMPump1-Emergency
 ISTTOK:central:TMPump1-Acceleration
@@ -6,6 +91,26 @@ ISTTOK:central:TMPump2-Emergency
 ISTTOK:central:TMPump2-Acceleration
 ISTTOK:central:TTSystem-tzero
 ISTTOK:central:Emergency-PhysButton
+ISTTOK:central:LASTOPSTATE
+ISTTOK:SR_rebootStatus
+ISTTOK:SR_status
+ISTTOK:SR_0_Status
+ISTTOK:SR_1_Status
+ISTTOK:SR_2_Status
+ISTTOK:SR_3_Status
+ISTTOK:SR_4_Status
+ISTTOK:SR_5_Status
+ISTTOK:SR_6_Status
+ISTTOK:SR_7_Status
+ISTTOK:central:PCF8574:56:REGISTER:READ
+ISTTOK:central:PCF8574:57:REGISTER:READ
+ISTTOK:central:PCF8574:60:REGISTER:READ
+ISTTOK:central:PCF8574:61:REGISTER:READ
+ISTTOK:central:RELAY4:17:REGISTER:READ
+ISTTOK:central:CurrentTime
+ISTTOK:central:TMPump2-Speed
+ISTTOK:central:TMPump2-Current
+ISTTOK:central:Shot-TorPSCurrentImage
 ISTTOK:central:UPS-OnBattery
 ISTTOK:central:UPS-Shutdown
 ISTTOK:central:OPREQ
@@ -41,117 +146,14 @@ ISTTOK:SR_heartbeat
 ISTTOK:SR_i_am_alive
 ISTTOK:SR_deadIfZero
 ISTTOK:SR_disable
-ISTTOK:central:TMPump1-ControllerOnInv
-ISTTOK:central:TMPump1-ControllerOffInv
-ISTTOK:central:TMPump1-MotorOnInv
-ISTTOK:central:TMPump1-MotorOffInv
-ISTTOK:central:BuzzerInv
-ISTTOK:central:Shot-TorPSTriggerInv
-ISTTOK:central:PCF8574:56:REGISTER:READ:FNOUT
-ISTTOK:central:PCF8574:57:REGISTER:READ:FNOUT
-ISTTOK:central:PULSE-NUMBER
-ISTTOK:central:PCF8591:72:DAC
-ISTTOK:central:TDA8444:32:DAC_CH0
-ISTTOK:central:TDA8444:32:DAC_CH1
-ISTTOK:central:TDA8444:32:DAC_CH2
-ISTTOK:central:TDA8444:32:DAC_CH3
-ISTTOK:central:TDA8444:32:DAC_CH4
-ISTTOK:central:TDA8444:32:DAC_CH5
-ISTTOK:central:TDA8444:32:DAC_CH6
-ISTTOK:central:Shot-TorPSCurrent
-ISTTOK:SR_0_State
-ISTTOK:SR_1_State
-ISTTOK:SR_2_State
-ISTTOK:SR_3_State
-ISTTOK:SR_4_State
-ISTTOK:SR_5_State
-ISTTOK:SR_6_State
-ISTTOK:SR_7_State
-ISTTOK:SR_disableMaxSecs
-ISTTOK:central:OPCALCSTATE
-ISTTOK:central:STARTCALCSTATE
-ISTTOK:central:STOPPINGCALCSTATE
-ISTTOK:central:CLEANCALCSTATE
-ISTTOK:central:WSHOTCALCSTATE
-ISTTOK:central:COUNTDOWN
-ISTTOK:central:COUNTER
-ISTTOK:central:PCF8591:72:BYTE2_CH1
-ISTTOK:central:PCF8591:72:BYTE2_CH2
-ISTTOK:central:PCF8591:72:BYTE2_CH3
-ISTTOK:central:Emergency
-ISTTOK:central:TMPump1-PressureAdmission
-ISTTOK:central:RPump1-Pressure
-ISTTOK:central:VVessel-Pressure
-ISTTOK:central:RPump2-Pressure
-ISTTOK:central:TMPump2-Speed
-ISTTOK:central:TMPump2-Current
-ISTTOK:central:Shot-TorPSCurrentImage
-ISTTOK:central:OPSTATE
-ISTTOK:central:STARTINGSTATE
-ISTTOK:central:CLEANINGSTATE
-ISTTOK:central:WSHOTINGSTATE
-ISTTOK:central:STOPPINGSTATE
-ISTTOK:central:PCF8574:56:REGISTER:READ
-ISTTOK:central:PCF8574:57:REGISTER:READ
-ISTTOK:central:PCF8574:60:REGISTER:READ
-ISTTOK:central:PCF8574:61:REGISTER:READ
-ISTTOK:central:LASTOPSTATE
-ISTTOK:SR_rebootStatus
-ISTTOK:SR_status
-ISTTOK:SR_0_Status
-ISTTOK:SR_1_Status
-ISTTOK:SR_2_Status
-ISTTOK:SR_3_Status
-ISTTOK:SR_4_Status
-ISTTOK:SR_5_Status
-ISTTOK:SR_6_Status
-ISTTOK:SR_7_Status
 ISTTOK:central:PCF8574:56:REGISTER
 ISTTOK:central:PCF8574:57:REGISTER
 ISTTOK:central:PCF8574:60:REGISTER
 ISTTOK:central:PCF8574:61:REGISTER
 ISTTOK:central:PCF8591:72:CTRLREGISTER
-ISTTOK:central:CurrentTime
-ISTTOK:central:PCF8591:72:ADC_CH1
-ISTTOK:central:PCF8591:72:ADC_CH2
-ISTTOK:central:PCF8591:72:ADC_CH3
-ISTTOK:central:P001:M
-ISTTOK:central:P001:E
-ISTTOK:central:P002:M
-ISTTOK:central:P002:E
-ISTTOK:central:P003:M
-ISTTOK:central:P003:E
-ISTTOK:central:P004:M
-ISTTOK:central:P004:E
-ISTTOK:central:TraceMessage
-ISTTOK:central:LogMessage
-ISTTOK:central:RS485Debug
-ISTTOK:central:sendmail
-ISTTOK:SR_recentlyStr
-ISTTOK:SR_rebootStatusStr
-ISTTOK:SR_rebootTime
-ISTTOK:SR_statusStr
-ISTTOK:SR_0_Name
-ISTTOK:SR_0_StatusStr
-ISTTOK:SR_0_Time
-ISTTOK:SR_1_Name
-ISTTOK:SR_1_StatusStr
-ISTTOK:SR_1_Time
-ISTTOK:SR_2_Name
-ISTTOK:SR_2_StatusStr
-ISTTOK:SR_2_Time
-ISTTOK:SR_3_Name
-ISTTOK:SR_3_StatusStr
-ISTTOK:SR_3_Time
-ISTTOK:SR_4_Name
-ISTTOK:SR_4_StatusStr
-ISTTOK:SR_4_Time
-ISTTOK:SR_5_Name
-ISTTOK:SR_5_StatusStr
-ISTTOK:SR_5_Time
-ISTTOK:SR_6_Name
-ISTTOK:SR_6_StatusStr
-ISTTOK:SR_6_Time
-ISTTOK:SR_7_Name
-ISTTOK:SR_7_StatusStr
-ISTTOK:SR_7_Time
+ISTTOK:central:RELAY4:17:REGISTER
+ISTTOK:central:OPSTATE
+ISTTOK:central:STARTINGSTATE
+ISTTOK:central:CLEANINGSTATE
+ISTTOK:central:WSHOTINGSTATE
+ISTTOK:central:STOPPINGSTATE
diff --git a/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/st.cmd b/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/st.cmd
index d928e76..36c66f3 100755
--- a/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/st.cmd
+++ b/epics/iocs/ISTTOKrpi/iocBoot/iocISTTOKrpi/st.cmd
@@ -23,6 +23,8 @@ dbLoadRecords("db/ISTTOKpcf8574.db","P=ISTTOK:,R=central:,BUS=I2C")
 dbLoadRecords("db/ISTTOKpcf8591.db","P=ISTTOK:,R=central:,BUS=I2C")
 dbLoadRecords("db/ISTTOKtda8444.db","P=ISTTOK:,R=central:,BUS=I2C")
 dbLoadRecords("db/ISTTOKmachineControl.db","P=ISTTOK:,R=central:")
+## SEEED RELAY BOARD
+dbLoadRecords("db/seeed4relay.db","P=ISTTOK:,R=central:,A=17")
 
 ## Load Serial drivers
 #drvAsynSerialPortConfigure("RS0","/dev/ttyAMA0")
@@ -46,7 +48,7 @@ dbLoadRecords("db/sendmail.db", "P=ISTTOK:,PORT=L0,R=central:,L=0,A=0")
 
 # Uncomment to Debug STREAMDEVICE serial activity
 # 2021/12/14 13:11:50.019969 RS0 ISTTOK:central:P002:M: No reply within 200 ms to "0020074002=?107<0d>
-var streamError 1
+#var streamError 1
 #with this no errors on pfeiffer bus
 #var streamDebug 1
 #streamSetLogfile("logfile.txt")