# Analog Clock demo help **URL:** \ **Category:** How-to and Tutorials\ **Created:** [April 29, 2020, 10:59am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869 "2020-04-29T10:59:46Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 29, 2020, 10:59am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/1 "2020-04-29T10:59:46Z")
Hi I’m trying to implement a clock in my own package but I’m having a problem with getting the initial time. I’m using this demo: [https://github.com/dividuum/info-beamer-nodes/tree/master/analogclock](https://github.com/dividuum/info-beamer-nodes/tree/master/analogclock) and I think that the problem is the line in the python script: sock.sendto(‘ **analogclock** /clock/set:%d’ % since\_midnight, (‘127.0.0.1’, 4444)) I have tried to replace the “analogclock” with my packet name, but it does not seems to work :-/ Any clue to what I can do to find the problem? ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 29, 2020, 11:07am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/2 "2020-04-29T11:07:09Z")
The `analogclock` part here is the name of the top-level node. The code you linked is quite old and from a time where info-beamer on the Pi didn’t even exist. When you ran info-beamer and gave the `analogclock` directory as argument, the top level node is named `analogclock`. Or more generalized: Starting info-beamer with `info-beamer /path/to/some-directory` will result in the top leven node being named `some-directory`. The UDP addressing expects the full node path, including the top-level node. So the above call expects that node to be named `analogclock`. Now on hosted, all the Lua top level code always ends up in `/space/root`, so the top-level node is always named `root`. If you change the value to `root/clock/set:...` it should work. ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 7:46am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/3 "2020-04-30T07:46:36Z")
This didn’t seem to work ([https://info-beamer.com/package/11389](https://info-beamer.com/package/11389)) I have changed it to: ``` sock.sendto('root/clock/set:%d' % since_midnight, ('127.0.0.1', 4444)) ``` and in my lua file: ``` util.data_mapper{ state = function(state) button = state == '0' end, ["clock/set"] = function(time) base_time = tonumber(time) - sys.now() N.base_time = base_time end } ``` ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 30, 2020, 9:23am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/4 "2020-04-30T09:23:43Z")
What happens? At first sight, it looks correct. I would suggest you add a debug print output to the callback to see if it ends up being called. ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 10:10am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/5 "2020-04-30T10:10:11Z")
Where do I see the “print”. It’s not shown on the screen. ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 30, 2020, 10:13am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/6 "2020-04-30T10:13:45Z")
In the local log output: ```auto logread -f | grep info-beamer: ``` ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 10:43am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/7 "2020-04-30T10:43:24Z")
It seems that I can’t login using ssh. Putty gives me a time-out and Linux: ssh: connect to host 172.16.1.150 port 22: Resource temporarily unavailable Authorization file is added and is working on other systems ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 10:51am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/8 "2020-04-30T10:51:20Z")
Using the web terminal I can see that “print” in lua is not showing in the log, but I got this. ``` Apr 30 10:48:39 Micro user.notice service.root: [hosted.py] sending 'root/state:0' Apr 30 10:48:39 Micro user.notice info-beamer: [root] button Apr 30 10:48:40 Micro user.notice service.root: [hosted.py] sending 'root/state:1' Apr 30 10:48:40 Micro user.notice info-beamer: [root] button Apr 30 10:48:41 Micro user.notice service.root: [hosted.py] sending 'root/state:0' Apr 30 10:48:42 Micro user.notice info-beamer: [root] button Apr 30 10:48:43 Micro user.notice service.root: [hosted.py] sending 'root/state:1' Apr 30 10:48:43 Micro user.notice info-beamer: [root] button ``` This means that I can’t use “print” for debugging ☹ ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 30, 2020, 10:56am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/9 "2020-04-30T10:56:18Z")
> [@Wassini](#): > > This means that I can’t use “print” for debugging ☹ Not sure I understand: The line ```auto Apr 30 10:48:39 Micro user.notice info-beamer: [root] button ``` is the result of a `print("button")` somewhere. ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 10:57am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/10 "2020-04-30T10:57:42Z")
I have added a debug string to: ``` util.data_mapper{ state = function(state) debugtxt = debugtxt .. " button " button = state == '0' end, ["device_info"] = function(info) debugtxt = debugtxt .. "device_info" info = json.decode(info) location = info.location description = info.description end, ["clock/set"] = function(time) debugtxt = debugtxt .. "Clock/set" base_time = tonumber(time) - sys.now() N.base_time = base_time end } ``` This is empty, so it seems that util.data\_mapper is never called. ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 30, 2020, 11:02am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/12 "2020-04-30T11:02:22Z")
Just to be sure: This is the node.lua of the top-level directory, correct? So it’s not part of a package that is added as a child within a setup (similarly to how the power saver package is usually used). You can also increase the log level by running `pkill -usr2 info-beamer` on the device once. This will increase the debug level from 3 to 4 and the log will be filled with a lot more information. The UDP message should be in there, but I can’t tell you what to grep for right now. I think using `logread -f|grep -i udp` should show something though. ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 11:02am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/13 "2020-04-30T11:02:51Z")
> [@infobeamer-fw](#): > > is the result of a `print("button")` somewhere. Don’t know where that came from. I added a lot of “print” statements, but I’m not sure I added just one saying “button”. ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 30, 2020, 11:04am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/14 "2020-04-30T11:04:04Z")
The code on the device is the correct one? Is `node.lua` what you expect it to be? ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 11:11am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/15 "2020-04-30T11:11:37Z")
Ok - figured out that the “button” was my code in data\_mapper. Just got confused as no other print code was executed. ``` util.data_mapper{ state = function(state) print " Button state changed " button = state == '0' end, ["device_info"] = function(info) print "device_info" info = json.decode(info) location = info.location description = info.description end, ["clock/set"] = function(time) print "Clock/set" base_time = tonumber(time) - sys.now() N.base_time = base_time end } ``` When I press the button I get this: Apr 30 11:07:42 Micro user.notice info-beamer: [root] Button state changed but the other two functions seems never to be called. ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 30, 2020, 11:49am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/16 "2020-04-30T11:49:00Z")
Hm. I can take a look later to see what’s going on. The code looks correct, so it’s probably something minor. Which setup/device is that? Can you leave it running for a few hours? Did the pkill command above yield any log lines? You should see something when you `logread -f|grep state` and trigger the state callback. A similar line will be generated when you send the clock/set message. Do they show up? ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [April 30, 2020, 12:00pm UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/17 "2020-04-30T12:00:35Z")
([https://info-beamer.com/package/11389](https://info-beamer.com/package/11389)) The log shows nothing: Micro /space/root $ pkill -usr2 info-beamer Micro /space/root $ logread -f | grep state ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [April 30, 2020, 5:53pm UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/18 "2020-04-30T17:53:19Z")
Oh. Correct. The log output doesn’t actually include the sent value itself. My bad. Instead you get a line like this: ```auto [..] info-beamer: [main.c] udp packet (len 17) received from 127.0.0.1:43140 ``` I pasted your code into a mostly empty node.lua file and cannot reproduce the problem: First I restarted info-beamer to reset the log level to 3, the increased it to 4 using pkill and then tailed the log: ```nohighlight info-beamer-3689967300 /space/root # sv i /service/info-beamer info-beamer-3689967300 /space/root # pkill -usr2 info-beamer info-beamer-3689967300 /space/root # logread -f|grep -v frame ``` Terminal output (slightly cut to make it fit a bit better): ```nohighlight info-beamer: [main.c] udp packet (len 19) received from 192.168.1.147:50038 info-beamer: [root] Clock/set info-beamer: [root] runtime error: [...] ``` The error is expected, as the code after the `print` bugs out as it’s an almost empty node.lua, but as you can see the `print("Clock/set")` is executed. On another machine, I triggered this running: ```nohighlight fw@somebox:~$ echo -en 'root/clock/set:1234' | netcat -u 192.168.1.165 4444 ``` Are there maybe multiple util.data\_wrapper “blocks” within your node.lua file? Do you have child nodes? How do you try to trigger this? Using Python? What exactly do you send there? ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [May 1, 2020, 8:33am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/19 "2020-05-01T08:33:07Z")
When using the terminal output you are using I just get a million lines: > May 1 08:27:09 Micro user.notice info-beamer: [main.c] frame time 0.0167 > May 1 08:27:09 Micro user.notice info-beamer: [font.c] buffered rendering 72 vertices from 1 > May 1 08:27:09 Micro user.notice info-beamer: [font.c] buffered rendering 108 vertices from 2 > May 1 08:27:09 Micro user.notice info-beamer: [font.c] buffered rendering 54 vertices from 3 > May 1 08:27:09 Micro user.notice info-beamer: [font.c] buffered rendering 168 vertices from 4 > May 1 08:27:09 Micro user.notice info-beamer: [font.c] buffered rendering 138 vertices from 5 > May 1 08:27:09 Micro user.notice info-beamer: [font.c] buffered rendering 90 vertices from 6 The util.data\_mapper is executes when I press the button, but e.g. the [“device\_info”] section is never called (I never get location and description filled) - and as far as I can see neigher is the [“clock/set”] section ---
**Author:** ![Wassini](https://community.info-beamer.com/user_avatar/community.info-beamer.com/wassini/32/203_2.png) [@Wassini](https://community.info-beamer.com/u/Wassini)\ **Post date:** [May 1, 2020, 8:38am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/20 "2020-05-01T08:38:22Z")
Using _grep root_ I get these lines when updating the package: > May 1 08:35:51 Micro user.notice info-beamer: [root] update +COPYRIGHT (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +README.md (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +arial.ttf (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +clock.py (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +config.json (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +hosted.py (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +node.json (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +package.json (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +package.png (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +service (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] update +node.lua (search) > May 1 08:35:51 Micro user.notice info-beamer: [root] [kernel] node code updated. booting … > May 1 08:35:51 Micro user.notice info-beamer: [root] [kernel] flushed vm. collected 0kb. 123kb in use > May 1 08:35:51 Micro user.notice info-beamer: [root] [kernel] loading bundled userlib.lua (‘info-beamer -d userlib’) > May 1 08:35:51 Micro user.notice info-beamer: [root] [userlib] loading bundled module ‘struct’ > May 1 08:35:51 Micro user.notice info-beamer: [root] loading root/node.lua > May 1 08:35:51 Micro user.notice info-beamer: [root] loading root/arial.ttf > May 1 08:35:51 Micro user.notice info-beamer: [font.c] loading root/arial.ttf (1027192 byte) > May 1 08:35:51 Micro user.notice info-beamer: [font.c] kerning for font root/arial.ttf: 1 > May 1 08:35:51 Micro user.notice info-beamer: [root] loading root/config.json > May 1 08:35:51 Micro user.notice info-beamer: [root] [userlib] loading bundled module ‘json’ > May 1 08:35:51 Micro user.notice info-beamer: [root] [kernel] node booted. 171kb in use > May 1 08:36:01 Micro user.notice info-beamer: 185kb 59.6 800 800 2.0% R-s- '- root (-) > May 1 08:36:11 Micro user.notice info-beamer: 185kb 59.9 800 800 1.0% R-s- '- root (-) No lines containing print “device\_info” print “Clock/set” ---
**Author:** ![infobeamer-fw](https://community.info-beamer.com/user_avatar/community.info-beamer.com/infobeamer-fw/32/3_2.png) [@infobeamer-fw](https://community.info-beamer.com/u/infobeamer-fw)\ **Post date:** [May 1, 2020, 10:47am UTC](https://community.info-beamer.com/t/analog-clock-demo-help/869/21 "2020-05-01T10:47:13Z")
I imported the package into my account, assigned it to a device, [exposed info-beamer to the network](https://info-beamer.com/doc/device-configuration#exposeinfobeamerports) (otherwise it’s completely unreachable from outside the device) and then sent the packet using: ```auto fw@somebox:~$ echo -en "root/clock/set:123"| netcat -u 192.168.1.181 4444 ``` That worked and resulted in the following log output on the device: ```auto May 1 [..snip..] user.notice info-beamer: [root] DEBUG: Clock/set ``` So there must be some small difference in how you approach this somewhere. How and from where do you send the device\_info packet for example? What’s the exact code for that? Is that from another machine in the network? [Next page](https://community.info-beamer.com/t/analog-clock-demo-help/869.md?page=2)