Just a quick question. Do you have a monitor (like the Pi 7 in touch 
screen) attached that is running off the same power supply as the Pi? I had 
a setup like that which used a splitter to power both the monitor and Pi 
from one power pack. My setup kept complaining of undervolting until I 
removed the splitter and plugged the monitor and pi each into their own 
power supply.

phil

On Monday, January 28, 2019 at 3:41:15 PM UTC-5, monmul wrote:
>
> I have replaced the power unit, taken it off the power strip an plugged 
> both it and the Vanatage into the mains. I have replaced the powered hub 
> (official RPi one...with another official RPi one) ...and here is what I am 
> getting.......very dispirited! I have another Davis Weather Envoy which I 
> will soon substitute for the one I am currently using.....but nothing seems 
> to make a difference and the Envoy just will not wake up!
>
> pi@raspberrypi:~ $ sudo tail -f /var/log/syslog
> Jan 29 09:14:05 raspberrypi udisksd[766]: Mounted /dev/sda1 at 
> /media/pi/e78ab10a-51d2-40f0-aa6d-5f2d2b0f27b7 on behalf of uid 1000
> Jan 29 09:14:05 raspberrypi vncserver-x11[453,root]: SPrintConnMgr: Failed 
> to add printer: server-error-service-unavailable
> Jan 29 09:14:07 raspberrypi dhcpcd[338]: wlan0: no IPv6 Routers available
> Jan 29 09:14:10 raspberrypi kernel: [   22.871754] Voltage normalised 
> (0x00000000)
> Jan 29 09:14:12 raspberrypi weewx[506]: vantage: Unable to wake up console
> Jan 29 09:14:12 raspberrypi weewx[506]: import of driver failed: Unable to 
> wake up Vantage console (<class 'weewx.WakeupError'>)
> Jan 29 09:14:12 raspberrypi weewx[506]: engine: Unable to load driver: 
> Unable to wake up Vantage console
> Jan 29 09:14:12 raspberrypi weewx[506]:     ****  Exiting...
> Jan 29 09:14:27 raspberrypi kernel: [   39.511958] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:14:31 raspberrypi kernel: [   43.671921] Voltage normalised 
> (0x00000000)
> Jan 29 09:15:00 raspberrypi ntpd[467]: Soliciting pool server 103.239.8.22
> Jan 29 09:15:00 raspberrypi ntpd[467]: Soliciting pool server 202.46.185.18
> Jan 29 09:15:01 raspberrypi ntpd[467]: Soliciting pool server 203.99.128.48
> Jan 29 09:15:01 raspberrypi ntpd[467]: Soliciting pool server 
> 103.106.66.123
> Jan 29 09:15:02 raspberrypi ntpd[467]: Soliciting pool server 103.242.68.69
> Jan 29 09:15:02 raspberrypi ntpd[467]: Soliciting pool server 
> 103.106.65.219
> Jan 29 09:15:02 raspberrypi ntpd[467]: Soliciting pool server 103.242.70.5
> Jan 29 09:15:02 raspberrypi ntpd[467]: Soliciting pool server 
> 122.252.188.99
> Jan 29 09:15:03 raspberrypi ntpd[467]: Soliciting pool server 
> 130.217.226.51
> Jan 29 09:15:03 raspberrypi ntpd[467]: Soliciting pool server 103.242.68.68
> Jan 29 09:15:03 raspberrypi ntpd[467]: Soliciting pool server 203.99.128.34
> Jan 29 09:15:04 raspberrypi ntpd[467]: Soliciting pool server 202.46.177.18
> Jan 29 09:15:04 raspberrypi ntpd[467]: Soliciting pool server 
> 2407:f100:0:4::3
> Jan 29 09:15:06 raspberrypi ntpd[467]: Soliciting pool server 202.46.178.18
> Jan 29 09:17:41 raspberrypi systemd[584]: Time has been changed
> Jan 29 09:17:41 raspberrypi systemd[1]: Time has been changed
> Jan 29 09:17:41 raspberrypi systemd[1]: apt-daily.timer: Adding 9h 28min 
> 39.184756s random time.
> Jan 29 09:17:41 raspberrypi systemd[1]: apt-daily-upgrade.timer: Adding 
> 27min 17.961005s random time.
> Jan 29 09:18:28 raspberrypi kernel: [  126.872661] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:18:34 raspberrypi kernel: [  133.112736] Voltage normalised 
> (0x00000000)
> Jan 29 09:18:34 raspberrypi CRON[1276]: (root) CMD (   cd / && run-parts 
> --report /etc/cron.hourly)
> Jan 29 09:22:29 raspberrypi kernel: [  368.155297] 
> rpi_firmware_get_throttled: 2 callbacks suppressed
> Jan 29 09:22:29 raspberrypi kernel: [  368.155304] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:22:33 raspberrypi kernel: [  372.315315] 
> rpi_firmware_get_throttled: 2 callbacks suppressed
> Jan 29 09:22:33 raspberrypi kernel: [  372.315322] Voltage normalised 
> (0x00000000)
> Jan 29 09:24:27 raspberrypi kernel: [  486.716533] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:24:34 raspberrypi kernel: [  492.956607] Voltage normalised 
> (0x00000000)
> Jan 29 09:26:28 raspberrypi kernel: [  607.357755] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:26:32 raspberrypi kernel: [  611.517793] Voltage normalised 
> (0x00000000)
> Jan 29 09:26:45 raspberrypi ntpd[467]: 203.99.128.34 local addr 10.1.1.7 
> -> <null>
> Jan 29 09:30:13 raspberrypi ntpd[467]: 103.239.8.22 local addr 10.1.1.7 -> 
> <null>
> Jan 29 09:30:45 raspberrypi ntpd[467]: 203.99.128.48 local addr 10.1.1.7 
> -> <null>
> Jan 29 09:31:18 raspberrypi ntpd[467]: 122.252.188.99 local addr 10.1.1.7 
> -> <null>
> Jan 29 09:31:23 raspberrypi systemd[1]: Starting Cleanup of Temporary 
> Directories...
> Jan 29 09:31:23 raspberrypi systemd[1]: Started Cleanup of Temporary 
> Directories.
> Jan 29 09:32:22 raspberrypi ntpd[467]: 130.217.226.51 local addr 10.1.1.7 
> -> <null>
> Jan 29 09:32:59 raspberrypi kernel: [  998.401865] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:33:03 raspberrypi kernel: [ 1002.561870] Voltage normalised 
> (0x00000000)
> Jan 29 09:33:05 raspberrypi kernel: [ 1004.643095] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:33:12 raspberrypi kernel: [ 1010.882010] Voltage normalised 
> (0x00000000)
> Jan 29 09:33:22 raspberrypi kernel: [ 1021.282184] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:33:34 raspberrypi kernel: [ 1033.762240] Voltage normalised 
> (0x00000000)
> Jan 29 09:34:42 raspberrypi ntpd[467]: 103.106.66.123 local addr 10.1.1.7 
> -> <null>
> Jan 29 09:35:16 raspberrypi ntpd[467]: 103.106.65.219 local addr 10.1.1.7 
> -> <null>
> Jan 29 09:38:17 raspberrypi kernel: [ 1316.645409] 
> rpi_firmware_get_throttled: 12 callbacks suppressed
> Jan 29 09:38:17 raspberrypi kernel: [ 1316.645416] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:38:26 raspberrypi kernel: [ 1324.965452] 
> rpi_firmware_get_throttled: 12 callbacks suppressed
> Jan 29 09:38:26 raspberrypi kernel: [ 1324.965457] Voltage normalised 
> (0x00000000)
> Jan 29 09:38:28 raspberrypi kernel: [ 1327.045547] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:38:32 raspberrypi kernel: [ 1331.205544] Voltage normalised 
> (0x00000000)
> Jan 29 09:38:36 raspberrypi kernel: [ 1335.365722] Under-voltage detected! 
> (0x00050005)
> Jan 29 09:38:55 raspberrypi kernel: [ 1354.085857] Voltage normalised 
> (0x00000000)
>
>
> On Tuesday, 29 January 2019 08:51:01 UTC+13, vince wrote:
>>
>> On Monday, January 28, 2019 at 11:34:08 AM UTC-8, monmul wrote:
>>>
>>> I do have a spare official power supply, so I will swap out that and 
>>> test. ... I have a Pi3B+ on the way
>>>
>>
>> Reminder, the pi3b+ need 'more' power and runs a little hotter than the 
>> others, so definitely be certain you have a quality power supply.
>>
>> I have had great luck with 
>> https://www.amazon.com/CanaKit-Raspberry-Power-Supply-Listed/dp/B07BC6WH7V 
>> just as one example.  Also like the nice on/off switch dongle that came 
>> with it.
>>
>

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