updated to sort 'data stale' error - used info from 'https://raspberrypi.stackexchange.com/questions/66611/nut-cyberpower-data-stale'

etc/nut/ups.conf

@@ -143,4 +143,5 @@ maxretry = 3
   driver = usbhid-ups
   port = auto
   desc = "Cyberpower SX950U"
+  pollinterval = 15
 

etc/nut/upsd.conf

@@ -0,0 +1,110 @@
+# Network UPS Tools: example upsd configuration file
+#
+# This file contains access control data, you should keep it secure.
+#
+# It should only be readable by the user that upsd becomes.  See the FAQ.
+#
+# Each entry below provides usage and default value.
+
+# =======================================================================
+# MAXAGE <seconds>
+# MAXAGE 15
+MAXAGE 25
+#
+# This defaults to 15 seconds.  After a UPS driver has stopped updating
+# the data for this many seconds, upsd marks it stale and stops making
+# that information available to clients.  After all, the only thing worse
+# than no data is bad data.
+#
+# You should only use this if your driver has difficulties keeping
+# the data fresh within the normal 15 second interval.  Watch the syslog
+# for notifications from upsd about staleness.
+
+# =======================================================================
+# STATEPATH <path>
+# STATEPATH /var/run/nut
+#
+# Tell upsd to look for the driver state sockets in 'path' rather
+# than the default that was compiled into the program.
+
+# =======================================================================
+# LISTEN <address> [<port>]
+# LISTEN 127.0.0.1 3493
+# LISTEN ::1 3493
+#
+# This defaults to the localhost listening addresses and port 3493.
+# In case of IP v4 or v6 disabled kernel, only the available one will be used.
+#
+# You may specify each interface you want upsd to listen on for connections,
+# optionally with a port number.
+#
+# You may need this if you have multiple interfaces on your machine and
+# you don't want upsd to listen to all interfaces (for instance on a
+# firewall, you may not want to listen to the external interface).
+#
+# This will only be read at startup of upsd.  If you make changes here,
+# you'll need to restart upsd, reload will have no effect.
+
+# =======================================================================
+# MAXCONN <connections>
+# MAXCONN 1024
+#
+# This defaults to maximum number allowed on your system.  Each UPS, each
+# LISTEN address and each client count as one connection.  If the server
+# runs out of connections, it will no longer accept new incoming client
+# connections.  Only set this if you know exactly what you're doing.
+
+# =======================================================================
+# CERTFILE <certificate file>
+# CERTFILE /usr/local/ups/etc/upsd.pem
+#
+# When compiled with SSL support with OpenSSL backend,
+# you can enter the certificate file here.
+# The certificates must be in PEM format and must be sorted starting with
+# the subject's certificate (server certificate), followed by intermediate
+# CA certificates (if applicable_ and the highest level (root) CA. It should
+# end with the server key. See 'docs/security.txt' or the Security chapter of
+# NUT user manual for more information on the SSL support in NUT.
+#
+# See 'docs/security.txt' or the Security chapter of NUT user manual
+# for more information on the SSL support in NUT.
+
+# =======================================================================
+# CERTPATH <certificate file or directory>
+# CERTPATH /usr/local/ups/etc/cert/upsd
+#
+# When compiled with SSL support with NSS backend,
+# you can enter the certificate path here.
+# Certificates are stored in a dedicated database (splitted in 3 files).
+# Specify the path of the database directory.
+# 
+# See 'docs/security.txt' or the Security chapter of NUT user manual
+# for more information on the SSL support in NUT.
+
+# =======================================================================
+# CERTIDENT <certificate name> <database password>
+# CERTIDENT "my nut server" "MyPasSw0rD"
+#
+# When compiled with SSL support with NSS backend,
+# you can specify the certificate name to retrieve from database to
+# authenticate itself and the password
+# required to access certificate related private key.
+# 
+# See 'docs/security.txt' or the Security chapter of NUT user manual
+# for more information on the SSL support in NUT.
+
+# =======================================================================
+# CERTREQUEST <certificate request level>
+# CERTREQUEST REQUIRE
+#
+# When compiled with SSL support with NSS backend and client certificate
+# validation (disabled by default, see 'docs/security.txt'),
+# you can specify if upsd requests or requires client's' certificates.
+# Possible values are :
+#  - 0 to not request to clients to provide any certificate
+#  - 1 to require to all clients a certificate
+#  - 2 to require to all clients a valid certificate
+# 
+# See 'docs/security.txt' or the Security chapter of NUT user manual
+# for more information on the SSL support in NUT.
+

etc/nut/upsmon.conf-tmpl

@@ -187,7 +187,7 @@ HOSTSYNC 15
 # them quickly enough.  Rule of thumb: take the larger of the two
 # POLLFREQ values, and multiply by 3.
 
-DEADTIME 15
+DEADTIME 25
 
 # --------------------------------------------------------------------------
 # POWERDOWNFLAG - Flag file for forcing UPS shutdown on the master system