(RPI3 NodeJS) Project Disconnected

[sofronije]

I am using Blynk with Node.js,and after internet outage i found this error…
Hardware is raspi 3 model b,ethernet connection…
events.js:165
throw err;
^

Error: Uncaught, unspecified “error” event. (ENETUNREACH)
at Blynk.emit (events.js:163:17)
at Blynk.error (/usr/lib/node_modules/blynk-library/blynk.js:590:8)
at . (/usr/lib/node_modules/blynk-library/blynk.js:553:48)
at emitOne (events.js:96:13)
at emit (events.js:188:7)
at TLSSocket. (/usr/lib/node_modules/blynk-library/blynk-node.js:223:16)
at emitOne (events.js:96:13)
at TLSSocket.emit (events.js:188:7)
at emitErrorNT (net.js:1281:8)
at _combinedTickCallback (internal/process/next_tick.js:80:11)
at process._tickCallback (internal/process/next_tick.js:104:9)

How to solve this?

[Gunner]

@sofronije

Error: Uncaught, unspecified “error” event. (ENETUNREACH)

Put in some form of error trap (this is a Linux / Javascript issue not a Blynk issue… Google it) so that in event of ethernet error, if doesn’t crash.

[sofronije]

Can you tell me more about what to google exacly,i have no idea

[Gunner]

[sofronije]

Thanks for help,but i have no idea what to do

[Lichtsignaal]

ENET sounds like an Ethernet error. Is your Pi connected to Wifi or Cable?

[Gunner]

@sofronije

…after internet outage

Hardware is raspi 3 model b,ethernet connection…

@Lichtsignaal it is a relatively simple error trapping, reconnection case.

I say relatively as I do not have a drop in command to offer… just trying to get the OP to look up the concept of error trapping themselves.

Or even searching this forum themselves…

Node.js blynk-library error on reconnect

Hello, I am having a problem with my node.js script (blynk-library) throwing an error on reconnecting. The script runs just fine throughout the day. In the middle of the night however between 3-6am the app will permanently disconnect (script crashes). I assume the disconnect is related to my router or ISP. The script is called through rc.local on my raspberry pi zero w. To simulate a disconnect I ran the script via ssh…then pulled the ethernet cable. The blynk app disconnected then showed Conne…

[sofronije]

I Know this is not Blynk isue,but i cannot use blynk because of this Sh…!
My linux knowledge and java scripting is Zero,and i can only watch this…

[sofronije]

@Lichtsignaal Pi is connected with Cable…

[Lichtsignaal]

If you run a ping 8.8.8.8

Does it continue running or does it give time outs?

[sofronije]

Ping work perfect…But when there is internet outage then this is hapening.
After that i must ssh to Pi and run Blynk again…

[Gunner]

@sofronije

I Know this is not Blynk isue,but i cannot use blynk because of this

If your power goes out, you can’t use it either… do we troubleshoot your power bill payments

There is NO “Blynk” answer… do some research as directed and look at your options… Reboot the RPi if after internet disconnection, timed automatic script restarting, error trapping controlling other options, etc.

[Lichtsignaal]

That is weird because Blynk will keep running on the Pi. If there is a loss of connection it’s 99% sure something else.

When the Internet outage occurs, can you still connect from your local LAN to the Pi with the Blynk app and or hardware? It seems very unlogical it stops functioning.

[Gunner]

@Lichtsignaal

That is weird because Blynk will keep running on the Pi. If there is a loss of connection it’s 99% sure something else.

The disconnection issue is not Blynk related (as in caused by Blynk) and the Blynk NodeJS script will stop, due lack of connection… as discussed in that other topic I referenced above (without proper error trapping… and probably a few other things).

This OP’s issue is restarting Blynk after re-connection… that could be as simple as, well restarting the script and so many ways differing of doing that… you probably know them better then I do

I think part of the other topics discussion was somehow preventing the Blynk NodeJS script from stopping… thus Blynk re-connection would be automatic upon Ethernet re-connection… much like how we do it with C++ but I don’t recall if the Blynk JS library had all the requisite connection management support?

[sofronije]

@Lichtsignaal I can SSH to Rpi all the time,Rpi have 100% uptime…
@Gunner If is that simple to restart blynk after reconect,I would be grateful if you told me how to do it?

[Gunner]

@sofronije

I can SSH to Rpi all the time,Rpi have 100% uptime…

Wait… I thought the whole topic was due to you losing Ethernet connection… that is hardly 100% up-time

I have implemented simple error trapping that prevents a quick disconnect/reconnect from crashing my script (see other topic) but I haven’t bothered about auto restarts, etc… not critical in my case as up-time IS 99.9%

If I had a drop in solution, I would have offered it… but I don’t, that is why I made some quick checks and recommended you do the full research … I mean, why would I take my time away from my projects to do it all for you? Had you shown more initiative, I would have as well… but when confronted with nothing but “help mes” and no visible self-effort, I tend to hold back

Keep searching this site… there are other topics about this…

(Need assistance with JS error checking/trapping) Blynk on RPi occasional TCP timeout errors, must restart client

The “RPI using Blynk as a client” community seems a little low in percentage here and this JS error trapping issue is not anywhere near Blynk relivent, so it is unlikely we will find the magic bullet point that answers this question here. But there was another JavaScript based topic that ended up with some more example sketches… including the requisite error trapping routines (and there seems to be a few ways of doing that)… but anyhow, more data to dig through is better than less I b…

And I recall similar references about keeping a Blynk server running, or at least restarting it if it shuts down… the principle should be the same for JS Client.

[sofronije]

@Gunner

Had you shown more initiative, I would have as well… but when confronted with nothing but “help mes” and no visible self-effort, I tend to hold back

I read two days about this,I do not know how you figured I did not have an initiative
I already say i am linux noob,i know basic things and you telling me to do javascripting?
Thanks anyway for your help,and please do not waste more time on this problem,i beet you have a loot project to do…

[Lichtsignaal]

@Gunner

And I recall similar references about keeping a Blynk server running, or at least restarting it if it shuts down… the principle should be the same for JS Client.

Yeah, but you’d have to make sure to keep the script running and do error checking/reconnecting to the local Blynk server in the script I think.

Maybe I\ll try and come up with a solution for NodeJS (or JS in general) but at the moment I’m lacking in time (too much hobbies…).

[Gunner]

@sofronije

how you figured I did not have an initiative

well…

@sofronije

Can you tell me more about what to google exacly,i have no idea

@sofronije

Thanks for help,but i have no idea what to do

@sofronije

I Know this is not Blynk isue

@sofronije

I would be grateful if you told me how to do it?

No code, no clarification of efforts tried, no… nothing…

---

@sofronije

am linux noob,i know basic things and you telling me to do javascripting?

@sofronije

i beet you have a loot project to do…

In fact I do… on MY RPi3 with Blynk and NodeJS… I am also a total Linux and JS noob… barely out of the gate. That is one of the reasons I have stuck around this topic as long as I have (well that and the whole moderating of non-Blynk related issues on a Blynk forum )