diff --git a/IsegGUI.py b/IsegGUI.py
index 4afee5d..a57c12e 100755
--- a/IsegGUI.py
+++ b/IsegGUI.py
@@ -126,9 +126,11 @@ class MyWindow(QMainWindow):
 
     self.chkDB = QCheckBox("Enable", self)
     gLayout.addWidget(self.chkDB, 0, 2)
+    self.chkDB.setChecked(True)
     if token == None and useInfluxDBv1 == False:
       self.txtIP.setEnabled(False)
       self.chkDB.setEnabled(False)
+      self.chkDB.setChecked(False)
 
     lb1 = QLabel("Refresh period [sec] :", self)
     lb1.setAlignment(Qt.AlignmentFlag.AlignRight)
diff --git a/README.md b/README.md
index 0ccba19..d3c51e9 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,12 @@ install snmp, also
 
 also put the https://fsunuc.physics.fsu.edu/wiki/images/5/53/WIENER-CRATE-MIB.txt and put in /usr/share/snmp/mibs
 
+For homebrew snmp, need to put in homebrew snmp share folder. 
+
+If the system already has old snmp, can replace it with the homebrew one by 
+
+export PATH="/usr/local/opt/net-snmp/bin/:$PATH"
+
 # Usage
 
     ~>python3 IsegGUI.py <IP>