Since this is about a different meter I created a new entry but it looks like I have a similar/same problem as posted about the Kaifa smart meter. All connections seem to be OK but no meter readings.

My installation:

• brand new Landys+Gyr ZMF110 smart meter with P1 connector
• brand new flmv2b
• flm connected via LAN
• P1 connected on sensor 6 with cable provided (I didn't see any options to configure P1 under "Sensor" so nothing enabled)
• I see gas and electricity sensors on flukso.net
• I see my device ID (version 244) on flukso.net
• status page 3x OK (System, network, sensor config sync -- latest yesterday evening 22:56)
• All my device are in the 192.168.178.* local network segment as is the fluksometer

Despite all the good signs I don't see any electricity or gas readings in my dash. After a few seconds I see Error - The call for sensor smart-main experienced a timeout. You are probably not in the same local network as the FLM.

What to do next?

Hi Gebhardm,

I installed the flmdisplay/combined/raspi_setup.mdon Rpi and I got this error at running, but the page is open and not data.

The difference between raspi_setup.mdon and my Rpi is that I installed RASPBIAN 2014-09-09 instead of the 2014-06-20 that is not available.

~/node_modules/thing-client$ node test.js
*** WARNING *** The program 'node' uses the Apple Bonjour compatibility layer of Avahi.
*** WARNING *** Please fix your application to use the native API of Avahi!
*** WARNING *** For more information see

Many thanks for your help.

Having issues with readings. Not always showing today.
Doe this log make sense to any one?

Nov 5 05:50:25 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 05:50:33 flukso-4d93ce kern.info kernel: [ 339.530000] eth0: Configuring MAC for full duplex
Nov 5 05:50:34 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPREQUEST(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 05:50:34 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 05:50:41 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 05:50:41 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 05:51:11 flukso-4d93ce user.notice root: toggled to eth mode
Nov 5 05:51:11 flukso-4d93ce kern.info kernel: [ 377.260000] device eth0 left promiscuous mode
Nov 5 05:51:11 flukso-4d93ce kern.info kernel: [ 377.260000] br-lan: port 1(eth0) entered disabled state
Nov 5 05:51:11 flukso-4d93ce daemon.notice netifd: Interface 'lan' is now down
Nov 5 05:51:11 flukso-4d93ce daemon.info avahi-daemon[795]: Withdrawing address record for 192.168.255.1 on br-lan.
Nov 5 05:51:11 flukso-4d93ce daemon.info avahi-daemon[795]: Leaving mDNS multicast group on interface br-lan.IPv4 with address 192.168.255.1.
Nov 5 05:51:11 flukso-4d93ce daemon.info avahi-daemon[795]: Interface br-lan.IPv4 no longer relevant for mDNS.
Nov 5 05:51:12 flukso-4d93ce daemon.notice netifd: wan (676): Sending renew...
Nov 5 05:51:12 flukso-4d93ce daemon.notice netifd: wan (676): Received SIGTERM
Nov 5 05:51:12 flukso-4d93ce daemon.notice netifd: Interface 'wan' is now down
Nov 5 05:51:12 flukso-4d93ce daemon.info avahi-daemon[795]: Withdrawing address record for 192.168.0.29 on wlan0.
Nov 5 05:51:12 flukso-4d93ce daemon.info avahi-daemon[795]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.29.
Nov 5 05:51:12 flukso-4d93ce daemon.info avahi-daemon[795]: Interface wlan0.IPv4 no longer relevant for mDNS.
Nov 5 05:51:13 flukso-4d93ce kern.info kernel: [ 379.270000] wlan0: deauthenticating from 10:0d:7f:d4:b3:68 by local choice (reason=3)
Nov 5 05:51:13 flukso-4d93ce daemon.info supd[814]: Received event DISCONNECTED for wlan0
Nov 5 05:51:14 flukso-4d93ce daemon.notice netifd: wan (1028): udhcpc (v1.19.4) started
Nov 5 05:51:14 flukso-4d93ce daemon.notice netifd: wan (1028): Sending discover...
Nov 5 05:51:17 flukso-4d93ce daemon.notice netifd: wan (1028): Sending discover...
Nov 5 05:51:20 flukso-4d93ce daemon.notice netifd: wan (1028): Sending discover...
Nov 5 05:51:26 flukso-4d93ce daemon.warn dnsmasq[787]: no servers found in /tmp/resolv.conf.auto, will retry
Nov 5 05:51:26 flukso-4d93ce user.err heartbeat[1072]: POST https://api.flukso.net/device/4d93ceb43bd2b2ef3a262d241f529838: -2
Nov 5 05:51:26 flukso-4d93ce user.err heartbeat[1072]: Name or service not known
Nov 5 05:52:03 flukso-4d93ce daemon.warn dnsmasq-dhcp[787]: DHCP packet received on eth0 which has no address
Nov 5 05:52:06 flukso-4d93ce daemon.warn dnsmasq-dhcp[787]: DHCP packet received on eth0 which has no address
Nov 5 05:52:27 flukso-4d93ce user.notice root: toggled to wifi mode
Nov 5 05:52:27 flukso-4d93ce kern.info kernel: [ 453.530000] device eth0 entered promiscuous mode
Nov 5 05:52:27 flukso-4d93ce kern.info kernel: [ 453.530000] br-lan: port 1(eth0) entered forwarding state
Nov 5 05:52:27 flukso-4d93ce kern.info kernel: [ 453.530000] br-lan: port 1(eth0) entered forwarding state
Nov 5 05:52:27 flukso-4d93ce daemon.info avahi-daemon[795]: Joining mDNS multicast group on interface br-lan.IPv4 with address 192.168.255.1.
Nov 5 05:52:27 flukso-4d93ce daemon.info avahi-daemon[795]: New relevant interface br-lan.IPv4 for mDNS.
Nov 5 05:52:27 flukso-4d93ce daemon.info avahi-daemon[795]: Registering new address record for 192.168.255.1 on br-lan.IPv4.
Nov 5 05:52:27 flukso-4d93ce daemon.notice netifd: Interface 'lan' is now up
Nov 5 05:52:28 flukso-4d93ce daemon.notice netifd: wan (1028): Received SIGTERM
Nov 5 05:52:28 flukso-4d93ce daemon.notice netifd: Interface 'wan' is now down
Nov 5 05:52:29 flukso-4d93ce kern.info kernel: [ 455.530000] br-lan: port 1(eth0) entered forwarding state
Nov 5 05:52:29 flukso-4d93ce user.notice firewall: Reloading firewall due to ifup of lan (br-lan)
Nov 5 05:52:36 flukso-4d93ce kern.info kernel: [ 462.590000] wlan0: authenticate with 10:0d:7f:d4:b3:68
Nov 5 05:52:36 flukso-4d93ce kern.info kernel: [ 462.600000] wlan0: send auth to 10:0d:7f:d4:b3:68 (try 1/3)
Nov 5 05:52:36 flukso-4d93ce kern.info kernel: [ 462.610000] wlan0: authenticated
Nov 5 05:52:36 flukso-4d93ce kern.info kernel: [ 462.660000] wlan0: associate with 10:0d:7f:d4:b3:68 (try 1/3)
Nov 5 05:52:36 flukso-4d93ce kern.info kernel: [ 462.660000] wlan0: RX AssocResp from 10:0d:7f:d4:b3:68 (capab=0x411 status=0 aid=1)
Nov 5 05:52:36 flukso-4d93ce kern.info kernel: [ 462.670000] wlan0: associated
Nov 5 05:52:37 flukso-4d93ce daemon.info supd[814]: Received event CONNECTED for wlan0
Nov 5 05:52:39 flukso-4d93ce daemon.notice netifd: wan (1313): udhcpc (v1.19.4) started
Nov 5 05:52:40 flukso-4d93ce daemon.notice netifd: wan (1313): Sending discover...
Nov 5 05:52:40 flukso-4d93ce daemon.notice netifd: wan (1313): Sending select for 192.168.0.29...
Nov 5 05:52:41 flukso-4d93ce daemon.notice netifd: wan (1313): Lease of 192.168.0.29 obtained, lease time 3600
Nov 5 05:52:41 flukso-4d93ce daemon.info avahi-daemon[795]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.29.
Nov 5 05:52:41 flukso-4d93ce daemon.info avahi-daemon[795]: New relevant interface wlan0.IPv4 for mDNS.
Nov 5 05:52:41 flukso-4d93ce daemon.info avahi-daemon[795]: Registering new address record for 192.168.0.29 on wlan0.IPv4.
Nov 5 05:52:41 flukso-4d93ce daemon.notice netifd: Interface 'wan' is now up
Nov 5 05:52:42 flukso-4d93ce user.notice firewall: Reloading firewall due to ifup of wan (wlan0)
Nov 5 05:52:50 flukso-4d93ce daemon.info dnsmasq[787]: reading /tmp/resolv.conf.auto
Nov 5 05:52:50 flukso-4d93ce daemon.info dnsmasq[787]: using nameserver 198.142.235.14#53
Nov 5 05:52:50 flukso-4d93ce daemon.info dnsmasq[787]: using nameserver 208.67.220.220#53
Nov 5 05:52:50 flukso-4d93ce daemon.info dnsmasq[787]: using nameserver 208.67.220.222#53
Nov 5 05:52:50 flukso-4d93ce daemon.info dnsmasq[787]: using local addresses only for domain lan
Nov 5 05:52:52 flukso-4d93ce user.info heartbeat[1345]: POST https://api.flukso.net/device/4d93ceb43bd2b2ef3a262d241f529838: 200
Nov 5 06:00:01 flukso-4d93ce cron.info crond[667]: crond: USER root pid 1395 cmd /usr/bin/fcheck
Nov 5 06:01:01 flukso-4d93ce cron.info crond[667]: crond: USER root pid 1441 cmd /usr/bin/heartbeat 0
Nov 5 06:01:05 flukso-4d93ce user.info heartbeat[1442]: POST https://api.flukso.net/device/4d93ceb43bd2b2ef3a262d241f529838: 200
Nov 5 06:01:31 flukso-4d93ce daemon.info fluksod[821]: processed pulse 8492153f1144dba9fecf777466fdc508:1415167291:4033247
Nov 5 06:01:34 flukso-4d93ce daemon.info fluksod[821]: POST https://api.flukso.net/sensor/8492153f1144dba9fecf777466fdc508: 200
Nov 5 06:02:12 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415167332:3914153
Nov 5 06:02:14 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:02:14 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:06:08 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415167568:3914255
Nov 5 06:10:35 flukso-4d93ce kern.info kernel: [ 1541.780000] wlan0: deauthenticating from 10:0d:7f:d4:b3:68 by local choice (reason=3)
Nov 5 06:10:35 flukso-4d93ce daemon.info avahi-daemon[795]: Interface wlan0.IPv4 no longer relevant for mDNS.
Nov 5 06:10:35 flukso-4d93ce daemon.info avahi-daemon[795]: Leaving mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.29.
Nov 5 06:10:35 flukso-4d93ce daemon.info avahi-daemon[795]: Withdrawing address record for 192.168.0.29 on wlan0.
Nov 5 06:10:36 flukso-4d93ce daemon.info supd[814]: Received event DISCONNECTED for wlan0
Nov 5 06:10:37 flukso-4d93ce daemon.notice netifd: wan (1313): udhcpc: SIOCGIFINDEX: No such device
Nov 5 06:10:37 flukso-4d93ce daemon.notice netifd: wan (1313): Received SIGTERM
Nov 5 06:10:37 flukso-4d93ce daemon.notice netifd: Interface 'wan' is now down
Nov 5 06:10:42 flukso-4d93ce kern.info kernel: [ 1548.090000] wlan0: authenticate with 10:0d:7f:d4:b3:68
Nov 5 06:10:42 flukso-4d93ce kern.info kernel: [ 1548.110000] wlan0: send auth to 10:0d:7f:d4:b3:68 (try 1/3)
Nov 5 06:10:42 flukso-4d93ce kern.info kernel: [ 1548.120000] wlan0: authenticated
Nov 5 06:10:42 flukso-4d93ce kern.info kernel: [ 1548.160000] wlan0: associate with 10:0d:7f:d4:b3:68 (try 1/3)
Nov 5 06:10:42 flukso-4d93ce kern.info kernel: [ 1548.160000] wlan0: RX AssocResp from 10:0d:7f:d4:b3:68 (capab=0x411 status=0 aid=1)
Nov 5 06:10:42 flukso-4d93ce kern.info kernel: [ 1548.170000] wlan0: associated
Nov 5 06:10:42 flukso-4d93ce daemon.info supd[814]: Received event CONNECTED for wlan0
Nov 5 06:10:47 flukso-4d93ce daemon.info avahi-daemon[795]: Joining mDNS multicast group on interface wlan0.IPv4 with address 192.168.0.29.
Nov 5 06:10:47 flukso-4d93ce daemon.info avahi-daemon[795]: New relevant interface wlan0.IPv4 for mDNS.
Nov 5 06:10:47 flukso-4d93ce daemon.info avahi-daemon[795]: Registering new address record for 192.168.0.29 on wlan0.IPv4.
Nov 5 06:10:47 flukso-4d93ce daemon.warn dnsmasq[787]: no servers found in /tmp/resolv.conf.auto, will retry
Nov 5 06:10:47 flukso-4d93ce daemon.notice netifd: Interface 'wan' is now up
Nov 5 06:10:47 flukso-4d93ce daemon.info dnsmasq[787]: reading /tmp/resolv.conf.auto
Nov 5 06:10:47 flukso-4d93ce daemon.info dnsmasq[787]: using nameserver 198.142.235.14#53
Nov 5 06:10:47 flukso-4d93ce daemon.info dnsmasq[787]: using nameserver 208.67.220.220#53
Nov 5 06:10:47 flukso-4d93ce daemon.info dnsmasq[787]: using nameserver 208.67.220.222#53
Nov 5 06:10:47 flukso-4d93ce daemon.info dnsmasq[787]: using local addresses only for domain lan
Nov 5 06:10:48 flukso-4d93ce user.notice firewall: Reloading firewall due to ifup of wan (wlan0)
Nov 5 06:12:17 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:12:17 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:15:01 flukso-4d93ce cron.info crond[667]: crond: USER root pid 1715 cmd /usr/bin/fcheck
Nov 5 06:15:26 flukso-4d93ce daemon.info supd[814]: Received event DISCONNECTED for wlan0
Nov 5 06:16:11 flukso-4d93ce kern.info kernel: [ 1877.680000] wlan0: authenticate with 10:0d:7f:d4:b3:68
Nov 5 06:16:11 flukso-4d93ce kern.info kernel: [ 1877.690000] wlan0: send auth to 10:0d:7f:d4:b3:68 (try 1/3)
Nov 5 06:16:11 flukso-4d93ce kern.info kernel: [ 1877.690000] wlan0: authenticated
Nov 5 06:16:11 flukso-4d93ce kern.info kernel: [ 1877.720000] wlan0: associate with 10:0d:7f:d4:b3:68 (try 1/3)
Nov 5 06:16:11 flukso-4d93ce kern.info kernel: [ 1877.720000] wlan0: RX AssocResp from 10:0d:7f:d4:b3:68 (capab=0x411 status=0 aid=1)
Nov 5 06:16:11 flukso-4d93ce kern.info kernel: [ 1877.730000] wlan0: associated
Nov 5 06:16:12 flukso-4d93ce daemon.info supd[814]: Received event CONNECTED for wlan0
Nov 5 06:20:39 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415168439:3914331
Nov 5 06:20:42 flukso-4d93ce daemon.info fluksod[821]: POST https://api.flukso.net/sensor/b4a04e554f01781b518eeae703abebb8: 200
Nov 5 06:21:27 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:21:27 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:21:31 flukso-4d93ce daemon.info fluksod[821]: processed pulse 8492153f1144dba9fecf777466fdc508:1415168491:4033356
Nov 5 06:22:48 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:22:48 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:29:05 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:29:05 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:30:01 flukso-4d93ce cron.info crond[667]: crond: USER root pid 2661 cmd /usr/bin/fcheck
Nov 5 06:32:50 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:32:50 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:32:51 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415169171:3914381
Nov 5 06:32:54 flukso-4d93ce daemon.info fluksod[821]: POST https://api.flukso.net/sensor/8492153f1144dba9fecf777466fdc508: 200
Nov 5 06:32:54 flukso-4d93ce daemon.info fluksod[821]: POST https://api.flukso.net/sensor/b4a04e554f01781b518eeae703abebb8: 200
Nov 5 06:36:34 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415169394:3914393
Nov 5 06:37:25 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415169445:3914407
Nov 5 06:37:33 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415169453:3914412
Nov 5 06:39:33 flukso-4d93ce kern.info kernel: [ 3279.020000] eth0: Configuring MAC for full duplex
Nov 5 06:39:37 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPREQUEST(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:39:37 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:39:43 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:39:43 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:41:04 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:41:04 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:43:07 flukso-4d93ce daemon.info fluksod[821]: processed pulse 8492153f1144dba9fecf777466fdc508:1415169787:4033415
Nov 5 06:43:10 flukso-4d93ce daemon.info fluksod[821]: POST https://api.flukso.net/sensor/b4a04e554f01781b518eeae703abebb8: 200
Nov 5 06:43:11 flukso-4d93ce daemon.info fluksod[821]: POST https://api.flukso.net/sensor/8492153f1144dba9fecf777466fdc508: 200
Nov 5 06:45:01 flukso-4d93ce cron.info crond[667]: crond: USER root pid 7982 cmd /usr/bin/fcheck
Nov 5 06:50:00 flukso-4d93ce daemon.info fluksod[821]: processed pulse b4a04e554f01781b518eeae703abebb8:1415170200:3914585
Nov 5 06:50:03 flukso-4d93ce daemon.info fluksod[821]: POST https://api.flukso.net/sensor/b4a04e554f01781b518eeae703abebb8: 200
Nov 5 06:51:06 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.255.197 00:24:81:6d:b4:f1
Nov 5 06:51:06 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.255.197 00:24:81:6d:b4:f1 MINI
Nov 5 06:52:31 flukso-4d93ce kern.info kernel: [ 4057.570000] eth0: Configuring MAC for full duplex
Nov 5 06:52:38 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPDISCOVER(br-lan) 00:21:00:dd:c6:ca
Nov 5 06:52:38 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPOFFER(br-lan) 192.168.255.164 00:21:00:dd:c6:ca
Nov 5 06:52:38 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPREQUEST(br-lan) 192.168.0.19 00:21:00:dd:c6:ca
Nov 5 06:52:38 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPNAK(br-lan) 192.168.0.19 00:21:00:dd:c6:ca wrong server-ID
Nov 5 06:52:46 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPINFORM(br-lan) 192.168.0.19 00:21:00:dd:c6:ca
Nov 5 06:52:46 flukso-4d93ce daemon.info dnsmasq-dhcp[787]: DHCPACK(br-lan) 192.168.0.19 00:21:00:dd:c6:ca MINI

Hi,
my electricity readout is nearly real-time in my dash but my gas sensor reading seems to have a constant delay of 2-3 hours.... Is this normal ?
I'm using a modern readout with RJ-11 connector on my meter.

Thanks.

Paul

I am new to Flukso. It looks like I can only connect 3 current clamps, but skimming the hardware suggest there are more ADC ports. Can someone advise if it is possible to have more than 3 current clamps, and point me to the appropriate information?