Nextion 3.2″ and 3.5″ Display Firmware

Allan KN4UD has put together display firmware for the Nextion 3.2″ and 3.5″ displays that represent “works in progress”.

Downloads

Reference

Nextion 5″ and 7″ TFT and HMI files

The effects on the new 7″ Nextion screen design from VE1BWV are pretty impressive!   You need a large enclosure to enjoy the 7″ display.

Photo courtesy of Vern AA7HC

Reference

Nextion display 3.5″ beta firmware files

Ron, KGØJ has done some work on rescaling the graphics for the Nextion 3.5” display.   It’s not 100% complete yet but he’s got all the major functional screens done and he has started work on moving some of the others around so they at least use some more of the screen real estate.  Ron says the rescaled graphics look better than earlier versions.

The files are attached as a zip containing the .tft and .hmi files.  The 90 refers to the orientation of the display, this one puts the SD card slot at the bottom.

Nextion Firmware for 3.2″ and 7″ screens

VE1BWV(Joe) and KN4UD (Allen) have  announced the release of Nextion firmware to support larger screen sizes with KD8CEC firmware v 1.094 and up.

The current releases include support for the 3.2 and 3.2E and for the 7 inch Nextion display.

The screens have been redeveloped with new buttons  and enhanced graphics to reflect each of the 2 display sizes.   This work is on going but due to high requests they have decided to release current versions which are fully functional and utilise the full display area.

Downloads:

Reference

Updated Nextion firmware v1.095 beta

Ian KD8CEC has released an update of his µBITx firmware and accompanying firmware for the Nextion display (for 2.4″ and 2.8″ displays).

 

Others are working on resizing the firmware to work on 3.2″, 3.5″ and 7″ displays.  It would be simple to also convert the 7″ firmware to work with a 5″ display.

So what is new in this latest beta release?

  • The buttons are more reliable, and are quicker to take action.  Changing mode was a bit of a slow process with lots of flashing buttons in previous versions

  • Pressing on the step size now opens up buttons to select step value.  This makes it so much quicker to get around the band.  Select a bigger step value to get to where you want to go, and switch back to 1Hz steps to fine tune.

 

  • By selecting which file you download, you can now read/write to all EEPROM memories or just those that relate to the Nextion display, protecting your rig’s settings securely if you want (the only way you can change them is in uBITx Manager if you go with this option).

  • Adjust the frequency by pressing on different sections of the frequency shown on the Nextion display
  • The lock button locks the Nextion screen as well now which is handy for using your rig around young children.
  • The sleep function has been improved.  You can wake the screen up by moving the encoder dial, or pressing on the bottom left of the screen.

  • Install two screens – they will each mirror what happens on the other, but in some modes different functions can appear
  • A number of enhancements to the control menu, including an elementary spectrum scope, band scanning and memory selection, saving.

The pace of development is pretty staggering.  We all look forward to other functions being added to the Nextion screen in future!

To download these beta files check out Ian’s article.

MicroSD reader extender

Rohn KR0HN  was “parts shopping” online when he came across a microSD card extension cable.

This could be used to extend the microSD card slot of the Nextion display out to the exterior of the case.  This would be handy for upgrades to the display firmware as new features become available for your display.

The link to the amazon page is: https://www.amazon.com/Extension-Extender-Flexible-Monoprice-Raspberry/dp/B072X27V58/ref=pd_sim_147_14

Reference

Dimming your Nextion display

Ian KD8CEC has been looking at power consumption on the Nextion display and how to effectively dim the screen for portable µBITx work, where you want low current drain.

The following picture show’s Ian’s display (2.8″ TJC Chinese version) at Full Power:

And the screen fed with a series 50 ohm resistor (1/2 watt rated or more):

The slightly dimmer display halves the current consumption from 89mA to 44mA with a series 50 ohm resistor (made up of two 100 ohm resistors in parallel (or 3 x 150 ohm resistors in parallel).  The Nextion screen has a built in software dimming function, and this can be adjusted in Ian’s Nextion display firmware.   However, the feature generates noise in the µBITx and is not recommended.

Resistor installation

Installing a series resistor (with a value between 20 ohms and 100 ohms) in the +5V power lead will cause the display to be dimmed, but function normally (except for use of the micro-SD card reader).  The resistor could be installed across a slide switch or toggle switch (with one pole shorted and the other going through the resistor) to allow for two settings (normal, dimmed).   This could be handy for night time or portable use.  The circuit diagram for this is as below:

For further details see Ian’s website.