nanoDLP

Without the commande line, the serial will not work on PI3. If you really don't want to enter it, you'll need to use an ftdi adapter and use another serial port. But there is not problem with command line to enter. it add juste the serial option. Wich line make you afraid?

Hi,
It is so excited to finally see a computer-less solution for Nanodlp, so I just got my new nextion screen and tried as everything you list on Github, but I couldn't get anything displayed except "Connecting to printer..." message. It was so frustrating after trying for all afternoon.
I checked the output log in nextion by using WinSCP, and there is a looping of "error opening port  /dev/ttyAMA0 retry in 2 sec". Then I just found this article(http://www.briandorey.com/post/Raspberry-Pi-3-UART-Boot-Overlay-Part-Two) which including the method to enable /dev/ttyAMA0 of almost all version of Raspberry Pi, anyone who has the same problem as me could follow the instruction of your version on Raspi in it.
I'm using the latest verion of Raspberry Pi 3B, so for me, it can be done in just 5 steps:
1:run this in the terminal:sudo systemctl disable hciuart 
2:sudo nano /lib/systemd/system/hciuart.service  and change every "ttyAMA0" to "ttyS0", there will be 2 of them in total, then save and exit.
3:sudo nano /boot/config.txt   and add "dtoverlay=pi3-miniuart-bt" to the end, save and exit.
if you don't have "pi3-miniuart-bt" in your /boot/overlays, just download it here:http://ukonline2000.com/wp-content/uploads/2016/03/pi3-miniuart-bt-overlay.zip, and put "pi3-miniuart-bt-overlay.dtb" into /boot/overlays
4:sudo nano /boot/cmdline.txt delete "console=serial0,115200" or "console=ttyAMA0,115200"
5:run sudo apt-get update 
      sudo apt-get upgrade 
      sudo reboot 
Then finally I got it right! and thanks juliendelnatte for sharing your great work!!

Last edited by leaphr (2017-08-04 11:35:51)

Me too, Still can not pass the "Connecting to printer..." message, after try leaphr's post. Anyone can help?
I recorded what I have done, since that might help for others, with detail log.. Please help to figure out what mistake I have made, thank you..

1. Hardware connection
Connect the raspberry pi to the nextion screen through the Serial GPIO's :
[ok]

2. Upload the nextion firmware
Put the screen.tft file on a micro sd card, and plug it in the nextion screen.
Power the raspberry pi and the Nextion screen'll automatically update its firmware with the good one。
Make sure your micro sd card is FAT32, do not use the raspberry pi sd card, which is FAT.
[ok]
[update fw succeed,  I even change the "Connecting to printering" to other characters to make sure]

3 Enable the /dev/ttyAMA0 for Raspberry PI 3 mode B

I followed it,
http://www.briandorey.com/post/Raspberr … Workaround

3.1 config.txt
sudo vi /boot/config.txt

add the following lines:
dtoverlay=pi3-miniuart-bt-overlay
force_turbo=1

Here is the config.txt
----------------------------------------------------------------------------
# CAMERA SETTINGS ( 1 = ON, 0 = OFF)
#start_x=1
disable_camera_led=1

# DISPLAY SETTINGS
display_rotate=0x10000
hdmi_force_hotplug=1
hdmi_timings=1440 0 50 10 35 2560 0 4 2 2 0 0 0 50 0 198000000 0
hdmi_group=2
hdmi_mode=87
hdmi_pixel_freq_limit=500000000
hvs_priority=0x32ff
max_framebuffer_width=1440
max_framebuffer_height=2560
framebuffer_width=1440
framebuffer_height=2560
framebuffer_depth=24
framebuffer_ignore_alpha=1
config_hdmi_boost=4
gpu_mem=192

#dtoverlay=pi3-miniuart-bt-overlay
dtoverlay=pi3-miniuart-bt
force_turbo=1
enable_uart=1
------------------------------------------------------------------------
3.2 cmdline.txt
edit /boot/cmdline.txt

sudo vi /boot/cmdline.txt
change as:
------------------------------------------------------------------------------------------------
#A. Testing for uart console
#dwc_otg.lpm_enable=0 console=tty1 console=serial1,115200 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait

#B. for touch nanoDLP, remove the uart console
dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
---------------------------------------------------------------------

3.3 disable the bt
disable the built in bluetooth you need to stop hciattach trying to use the modem via uart0 which will disable the relevant systemd service

sudo systemctl disable hciuart

edit /lib/systemd/system/hciuart.server and replace ttyAMA0 with ttyS0.

sudo vi /lib/systemd/system/hciuart.service
Change as following:
-----------------------------------------------------------------------------------
[Unit]
Description=Configure Bluetooth Modems connected by UART
ConditionPathIsDirectory=/proc/device-tree/soc/gpio@7e200000/bt_pins
Before=bluetooth.service
After=dev-ttyS0.device

[Service]
Type=forking
ExecStart=/ur/bin/hciattach /dev/ttyS0 bcm43xx 921600 noflow -

[Install]
WantedBy=multi-user.target
-----------------------------------------------------------------------------
3.4 disable uart console

sudo raspi-config

Interfacing Option->Serial

choose Enable serial console as  NO
choose Enable serial hardware as YES

do not reboot the pi3, one more step:

3.5 upgrade os

sudo apt-get update
sudo apt-get upgrade
sudo reboot

4 Install the node js
wget -O - https://raw.githubusercontent.com/sdesa … -v6.4.0.sh | bash

3.5 Install the touch screen source code by Tibus
cd /home/pi
sudo apt-get update
sudo apt-get install git
git clone https://github.com/Tibus/TouchScreen-For-NanoDLP.git
mv TouchScreen-For-NanoDLP-master nextion

#Let index.js run automatic.
sudo sed -i.bak "1i#\!/bin/sh \-e\nnode /home/pi/nextion/bin/index.js 2> /home/pi/nextion/errorOutput.log > /home/pi/nextion/output.log &" /etc/rc.local

That is all, still nothing except the "Connecting to Printer..."

Here is the errorlog,
missing API key for pushbullet
/home/pi/nextion/node_modules/bindings/bindings.js:91
  throw err
  ^

Error: Could not locate the bindings file. Tried:
→ /home/pi/nextion/node_modules/serialport/build/serialport.node
→ /home/pi/nextion/node_modules/serialport/build/Debug/serialport.node
→ /home/pi/nextion/node_modules/serialport/build/Release/serialport.node
→ /home/pi/nextion/node_modules/serialport/out/Debug/serialport.node
→ /home/pi/nextion/node_modules/serialport/Debug/serialport.node
→ /home/pi/nextion/node_modules/serialport/out/Release/serialport.node
→ /home/pi/nextion/node_modules/serialport/Release/serialport.node
→ /home/pi/nextion/node_modules/serialport/build/default/serialport.node
→ /home/pi/nextion/node_modules/serialport/compiled/6.4.0/linux/arm/serialport.node
    at bindings (/home/pi/nextion/node_modules/bindings/bindings.js:88:9)
    at Object.<anonymous> (/home/pi/nextion/node_modules/serialport/lib/bindings.js:3:35)
    at Module._compile (module.js:556:32)
    at Object.Module._extensions..js (module.js:565:10)
    at Module.load (module.js:473:32)
    at tryModuleLoad (module.js:432:12)
    at Function.Module._load (module.js:424:3)
    at Module.require (module.js:483:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/home/pi/nextion/node_modules/serialport/lib/serialport.js:12:25)

That is all，what is the mistake?

Install guide for guys who using pi3 modeb, but stop at "Connecting printer..."
Thx for Tibus's help...

===============================
1. Hardware connection
===============================
Connect the raspberry pi to the nextion screen through the Serial GPIO's :
Look at the hardaware.jpg on github...

===============================
2. Upload the nextion firmware
===============================
Put the screen.tft file on a micro sd card, and plug it in the nextion screen.
Power the raspberry pi and the Nextion screen will automatically update its firmware with new ui.
Make sure your micro sd card is FAT32, do not use the raspberry pi sd card, which is FAT.

Where to get the tft files?
use the Nextion Editor.exe to compile the HMI..

===================================================
3 Enable the /dev/ttyAMA0 for Raspberry PI 3 mode B
===================================================
Look at this post, you will know why and how.
http://www.briandorey.com/post/Raspberr … Workaround

--------------------
3.1 config.txt
--------------------
#sudo vi /boot/config.txt

add the following lines to config.txt
dtoverlay=pi3-miniuart-bt-overlay
force_turbo=1

Add overlay file to boot/overlay
You can download the tdb file from:
http://www.briandorey.com/docs/Raspberr … verlay.zip

#cp pi3-miniuart-bt-overlay.dtb /boot/overlay

Here is the config.txt
----------------------------------------------------------------------------
# Camera Setting ( 1 = ON, 0 = OFF)
disable_camera_led=1

# Display Setting
display_rotate=0x10000
hdmi_force_hotplug=1
hdmi_timings=1440 0 50 10 35 2560 0 4 2 2 0 0 0 50 0 198000000 0
hdmi_group=2
hdmi_mode=87
hdmi_pixel_freq_limit=500000000
hvs_priority=0x32ff
max_framebuffer_width=1440
max_framebuffer_height=2560
framebuffer_width=1440
framebuffer_height=2560
framebuffer_depth=24
framebuffer_ignore_alpha=1
config_hdmi_boost=4
gpu_mem=192

dtoverlay=pi3-miniuart-bt-overlay
force_turbo=1
enable_uart=1
-----------------------------------------------------------------------------

---------------------------
3.2 Disable serial console
---------------------------
delete "console=serial0,115200" or "console=ttyAMA0,115200" in the cmdline.txt.
#sudo vi /boot/cmdline.txt
change as:
-----------------------------------------------------------------------------------------------------------------
dwc_otg.lpm_enable=0 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait
-----------------------------------------------------------------------------------------------------------------

Use the raspi-config to disable the serial console by enable the serial hardware...
#sudo raspi-config
Interfacing Option->Serial
choose Enable serial console as  NO
choose Enable serial hardware as YES
do not reboot the pi3.

If you can not find interfacing option, go to advanced option, since different version of pi os.

---------------------------
3.3 disable the bt
---------------------------
disable the built in bluetooth you need to stop hciattach trying to use the modem via uart0 which will disable
the relevant systemd service

#sudo systemctl disable hciuart

edit /lib/systemd/system/hciuart.server and replace ttyAMA0 with ttyS0.

#sudo vi /lib/systemd/system/hciuart.service
Change as following:
-----------------------------------------------------------------------------------
[Unit]
Description=Configure Bluetooth Modems connected by UART
ConditionPathIsDirectory=/proc/device-tree/soc/gpio@7e200000/bt_pins
Before=bluetooth.service
After=dev-ttyS0.device
[Service]
Type=forking
ExecStart=/ur/bin/hciattach /dev/ttyS0 bcm43xx 921600 noflow -
[Install]
WantedBy=multi-user.target
-----------------------------------------------------------------------------
---------------------------
3.4 upgrade os
---------------------------
#sudo apt-get update
#sudo apt-get upgrade
#sudo reboot

---------------------------------------
4 Install the sw of "Touch for nanoDLP
---------------------------------------
4.1 Install nodejs
#wget -O - https://raw.githubusercontent.com/sdesa … -v6.4.0.sh | bash

4.2 Install the release version by Tibus

#mkdir /home/pi/nextion;(wget https://github.com/Tibus/TouchScreen-Fo … 2_3.tar.gz --no-check-certificate -O - | tar -C /home/pi/nextion -xz);cd /home/pi/nextion; sudo ./setup.sh

Download the release package and set it automatic run up when boot os.
-------------------------------------------------------------------------------------------------------
#!/bin/sh -e
node /home/pi/nextion/bin/index.js 2> /home/pi/nextion/errorOutput.log > /home/pi/nextion/output.log &
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

/bin/bash /home/pi/printer/config/run.sh
exit 0
--------------------------------------------------------------------------------------------------------

I downloaded it and just put the SD card into comp and inserted file into overlays folder.

As am I Put sd card into comp, open drive folder and on top of folder contents there will be a folder named overlays. Drop that unzipped file in there. Eject drive and put back into pi.

Hi all,

In the attempt of update the nextion 2.4" NX32247024_011, i get the message "Model does not match Device Model: NX3224T024_011R". Can someone help me? Where i get wrong?

Hello,

Yes, I'm making my own printer and plan to add this feature to my printer so it will be added is next versions.

Hi, I want to translate this too, which files has the text that I can edit?

I translate in the nextion editor but some text seem to be in other places.

Hi,

I´ve got my NanoDLP working on the RPi3 with the 2.4 Nextion screen - using the instructins from Tibus on Git - great!

But when I try the 4.3 Inch Nextion screen - properly flashed with the right tft file - I just get the  "Connecting to Printer...".
Is there anything to change on RPI installation / software  or config in order to use a screen with same brand but different size?

Very strange...

Both Nextion screens are connected with the same cable. And the update of the 4.3 was working properly.
If have no idea what to do next? Maybe I try another Nextion Screen e.g. 3.5"...