Attempting to use with Pi3 - Nextion hangs on "connecting to printer...."

[sgraber]

I've followed all of the steps to have the display work with the Nextion 2.4" display on my Raspberry Pi 3, but the display hangs on "connecting to printer..." Is there any sort of log I can be looking at to see why it's hanging? Also: I'm assuming that I am to be enabling the login shell over serial from raspi-config (Advanced -> Serial -> Yes)? Or should this be set to No?

[diginfo]

Hi, I have the same problem, all steps followed (not difficult !) and all I get is connecting to printer.

Did you solve this ?

[Tibus]

did you try this ? https://www.nanodlp.com/forum/viewtopic.php?id=710

[diginfo]

Thanks, yes I did, but it did not work for me, but I am using original RPI3 (not B).

Here's how I got it to work:

# get the pi3 overlays
wget https://github.com/PiNet/PiNet-Boot/blob/master/boot/overlays/pi3-disable-bt-overlay.dtb
mv pi3-disable-bt-overlay.dtb /boot/overlays

wget https://github.com/PiNet/PiNet-Boot/blob/master/boot/overlays/pi3-miniuart-bt-overlay.dtb
mv pi3-miniuart-bt-overlay.dtb /boot/overlays

# edit /boot/config.txt & append:
dtoverlay=pi3-disable-bt
dtoverlay=pi3-miniuart-bt-overlay
force_turbo=1

The source for the overlays was just found via google, but could be from another source.

These files don't exist in my /boot/overlays folder.

[Tibus]

Is it working now by doing this? I have to write a bash file to configure in one step all you need on raspberry pi 3/pizero/pi3B,...

[diginfo]

Yes, it's working now, but I also did and un-did a lot of things over the last few hours during my debug process, however these steps did make it work.

Before that I got the following errors in the output.log:

list [ { comName: '/dev/ttyAMA0', manufacturer: undefined, serialNumber: undefined, pnpId: undefined, vendorId: undefined, productId: undefined }, { comName: '/dev/ttyS0', manufacturer: undefined, serialNumber: undefined, pnpId: undefined, vendorId: undefined, productId: undefined } ] error opening port /dev/ttyAMA0 retry in 2 seconds

There might be a better source for the overlay files, but they worked.

[diginfo]

Oh yes, also when loading the .tft file, I got an error something like "wrong model" - this is because I am using the advanced version with the built in RTC.

I re-compiled changing the model number to the advanced and used this file to load.

I saw another user on the forum reporting the same error, might be worthwhile adding comments or notes for this.

In your original readme, you stated 2.4" but you did not indicate standard or advanced version, I did not know that it made a difference when I ordered the screen !

Or provide 2 versions of the Screen.tft file, one for advanced version and one for std.

[Tibus]

Yes, I didn't have advanced version and tought there was no error running the standard .tft file on an advanced screen. I'll add .tft for every version in the future

[diginfo]

It would also be nice (if you have the time) to design a version that emulates the new wanhao box :-)

[Tibus]

For the UX part? Yes, I'm planning to redo all the UX. Do you have a video of the wanhao box screen UX?

[jamesarm97]

Emulates or "looks" like the wanhao UI, because if you emulate it, it will be a step backwards ;)

[jamesarm97]

Manual http://www.wanhao3dprinter.com/xiazai/OQD08011_D7_Box.pdf

[jamesarm97]

The main menu / icons look good but everything past that is very basic and plain. No image preview / layer preview or anything.

[diginfo]

The level of control is great, but the UI design can be a bit 'fiddly' if you have big sausage fingers or your eyesight is not so good ;-)

[Tibus]

yes, I 'll never emulate it ;D just take best points and try to reproduce it. I see a video, it's nice but there is no image/print preview,... but it's nice, I'll do my best to make a better UX for nanoDLP/nextion ;D

[Dylan144GT]

Hi Tibus,

Have you managed to interface to USB yet? I am busy doing a similar thing to you except I am using Python instead of NodeJS. The reason I ask is because I am having trouble submitting a form to nanoDLP with a post request. I get a 200 response when I post but nothin happens. Any ideas?

Thanks,

Dylan

[Tibus]

Hi, Not done yet, 'll work on it in few weeks.

[Dylan144GT]

Okay, thanks. Thanks for a good project BTW! :)

[Maxjewels]

I use the advanced version 3.2 "with rasp pi 3 and I did not have any problem

[diginfo]

Had to do a re-install from scratch using release 1437 as I am using the wanhao D7 and are unable to get past the "connecting to Printer' again.

I have checked and repeated all the steps that are listed in the forum but still nogo, not sure if it is a compatability issue with V1437 ?

There's nothing obvious in the output.log file (previously it was unable to connect)

{ nextion: { port: '/dev/ttyAMA0' }, pushbullet: { apiKey: null } } { apiKey: null } init connect to port /dev/ttyAMA0 list [ { comName: '/dev/ttyACM0', manufacturer: 'Arduino__www.arduino.cc_', serialNumber: 'Arduino__www.arduino.cc__Arduino_Mega_2560_7563331323335191C181', pnpId: 'usb-Arduino__www.arduino.cc__Arduino_Mega_2560_7563331323335191C181-if00', vendorId: '0x2341', productId: '0x0010' }, { comName: '/dev/ttyAMA0', manufacturer: undefined, serialNumber: undefined, pnpId: undefined, vendorId: undefined, productId: undefined }, { comName: '/dev/ttyS0', manufacturer: undefined, serialNumber: undefined, pnpId: undefined, vendorId: undefined, productId: undefined } ]

I have tried running the node app directly from the console, but I get no errors, only the output as above, how can I troubleshoot this ?

[Dylan144GT]

Hi Tibus,

Can you please tell me how you formulate the time remaining of a print? Ie. what information you fetch from where and the formula you apply with that information in order to calculate the remaining time of a print.

Thanks for the help.

Dylan

[Tibus]

Hello, The time remaining is calculated by NanoDLP, not my software.

[Dylan144GT]

Thanks for the response, I found what I was looking for though. It was in "PrintingHome.js" line 51 and 52. Thanks!

[Tibus]

Oups, sorry, I didn't remember Nanodlp do not send time remaining in minute or so. So I take the formula from NanoDLP Javascript home page.

[sgraber]

@Tibus : Is there a way to get debugging information when trying to connect your Nextion software to the Pi? I added four buttons to the Home screen, adjusted the js accordingly (I think?), compiled it, installed it. I'm now trying to debug why my custom buttons are not working. I'd like to see what calls are being made when I push a button. Is there a Pi debugging console somewhere?

[Tibus]

I never debug on the raspberry. If you run node bin/index.js on your computer, with the ip of your nanodlp computer in the config file ans the nextion screen connected to your computer (with so the good COM port in the config), the screen will manage NanoDLP trough the ethernet and you will be able to debug it.

Elsewhere, you can pkill node and run DEBUG=* node bin/index.js inside the nextion folder on your raspberry pi to get the debugging console on your raspberry

[sgraber]

Would someone mind looking at my code?

https://github.com/sgraber/TouchScreen-For-NanoDLP

I'm literally just trying to add four buttons to the home screen. I've added four buttons to the "home" screen in the Nextion Editor (see 2.4_LittleRP.hmi) and have added what I think are the proper calls to the home.js file in both the /src and /bin directories.

Any time I push these buttons, absolutely nothing happens. I'm at a loss.

[jcrorxp]

@sgraber i think you need to add some Page file ？

[BeardyWargameSi]

HI I have a Nextion 3.5" Screen - NX4832T035 and this just is not working at all. Tried the steps I don't know how many times in the last 24 hours, including the long walkthrough on the Tips and Tricks nanoDLP page, nothing. :/

I've updated to the latest stable build of nanoDLP, etc etc.

Honestly at my wits end with this and any help would be greatly appreciated.

The screen is stuck on a connecting to printer loop

Thanks

[setal2003]

Hello there I have done all the steps and it still doesn't work at the end I get the message of can not unlink certain directories Please help! thank you

pi@raspberrypi:~ $ mkdir /home/pi/nextion;(wget https://github.com/Tibus/TouchSc reen-For-NanoDLP/releases/download/V0.2/pi2_3.tar.gz --no-check-certificate -O - | tar -C /home/pi/nextion -xz);cd /home/pi/nextion; sudo ./setup.sh --2018-01-22 22:37:22-- https://github.com/Tibus/TouchScreen-For-NanoDLP/releas es/download/V0.2/pi2_3.tar.gz Resolving github.com (github.com)... 192.30.253.113, 192.30.253.112 Connecting to github.com (github.com)|192.30.253.113|:443... connected. HTTP request sent, awaiting response... 302 Found Location: https://github-production-release-asset-2e65be.s3.amazonaws.com/963614 42/9c96c61a-be85-11e7-807d-eba7033ee479?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-C redential=AKIAIWNJYAX4CSVEH53A%2F20180122%2Fus-east-1%2Fs3%2Faws4_request&X-Amz- Date=20180122T223723Z&X-Amz-Expires=300&X-Amz-Signature=d051cdb3832d626dff2ac94f 97d5b6c844f5a7f8a5c7ae5e5a85e5d9cdb45025&X-Amz-SignedHeaders=host&actor_id=0&res ponse-content-disposition=attachment%3B%20filename%3Dpi2_3.tar.gz&response-conte nt-type=application%2Foctet-stream [following] --2018-01-22 22:37:23-- https://github-production-release-asset-2e65be.s3.amazo naws.com/96361442/9c96c61a-be85-11e7-807d-eba7033ee479?X-Amz-Algorithm=AWS4-HMAC -SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20180122%2Fus-east-1%2Fs3%2Faws4 _request&X-Amz-Date=20180122T223723Z&X-Amz-Expires=300&X-Amz-Signature=d051cdb38 32d626dff2ac94f97d5b6c844f5a7f8a5c7ae5e5a85e5d9cdb45025&X-Amz-SignedHeaders=host &actor_id=0&response-content-disposition=attachment%3B%20filename%3Dpi2_3.tar.gz &response-content-type=application%2Foctet-stream Resolving github-production-release-asset-2e65be.s3.amazonaws.com (github-produc tion-release-asset-2e65be.s3.amazonaws.com)... 54.231.81.242 Connecting to github-production-release-asset-2e65be.s3.amazonaws.com (github-pr oduction-release-asset-2e65be.s3.amazonaws.com)|54.231.81.242|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 26420532 (25M) [application/octet-stream] Saving to: ‘STDOUT’

•                  100%[=============================>]  25.20M  1003KB/s   in 22s
  

2018-01-22 22:37:46 (1.14 MB/s) - written to stdout [26420532/26420532]

--2018-01-22 22:37:46-- https://raw.githubusercontent.com/sdesalas/node-pi-zero/master/install-node-v6.4.0.sh Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 151.101.112.133 Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|151.101.112.133|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 1324 (1.3K) [text/plain] Saving to: ‘STDOUT’

•                  100%[=============================>]   1.29K  --.-KB/s   in 0s
  

2018-01-22 22:37:46 (15.7 MB/s) - written to stdout [1324/1324]

--2018-01-22 22:37:46-- https://nodejs.org/dist/v6.4.0/node-v6.4.0-linux-armv6l.tar.gz Resolving nodejs.org (nodejs.org)... 2400:cb00:2048:1::6814:172e, 2400:cb00:2048:1::6814:162e, 104.20.23.46, ... Connecting to nodejs.org (nodejs.org)|2400:cb00:2048:1::6814:172e|:443... connected. HTTP request sent, awaiting response... 200 OK Length: 12746855 (12M) [application/gzip] Saving to: ‘node-v6.4.0-linux-armv6l.tar.gz’

node-v6.4.0-linux-armv 100%[=============================>] 12.16M 1.79MB/s in 6.8s s

2018-01-22 22:37:54 (1.79 MB/s) - ‘node-v6.4.0-linux-armv6l.tar.gz’ saved [12746855/12746855]

unlink: cannot unlink ‘/usr/bin/node’: No such file or directory unlink: cannot unlink ‘/usr/sbin/node’: No such file or directory unlink: cannot unlink ‘/sbin/node’: No such file or directory unlink: cannot unlink ‘/usr/local/bin/node’: No such file or directory unlink: cannot unlink ‘/usr/bin/npm’: No such file or directory unlink: cannot unlink ‘/usr/sbin/npm’: No such file or directory unlink: cannot unlink ‘/sbin/npm’: No such file or directory unlink: cannot unlink ‘/usr/local/bin/npm’: No such file or directory pi@raspberrypi:~/nextion $

[setal2003]

All I get is connecting to printer message