Further details on Nextion Display and second arduino

Ian KD8CEC, in his third article on using a second arduino with the µBITx, demonstrates the signal scope feature made possible with having a dedicated ardunio nano connected to the main Raduino control processor via i2c lines.

The signal scope shows a section of the band surrounding the currently tuned frequency IN REAL TIME.    The nano and the serial connections to the Nextion doesn’t have the agility to provide a full blown waterfall display, but a real time display of signals around where you are currently tuned is still pretty impressive.

The other feature that is present in the Nextion display version of this arduino add-on, is a CW decode function.

Bring on the release of v1.097 of CEC firmware!

Nextion display and a second arduino

Ian KD8CEC has now given us part 2 of his description of the latest firmware update (v1.097).   If you have a Nextion display, and add a second arduino you can have a higher quality s-meter and multi-band signal monitor on your µBITx.

For more details go to Ian’s website at hamskey.com

The wire up diagram follows:

The second arduino echos information in one direction from the main raduino via the i2c serial channel which is faster than via serial port.  It uses a dedicated serial port to output the signal again, potentially making the sampling faster for taking signal strength readings.  It will be interesting to see what effect this has in practice.

Remote head for uBITx

The creative genius of µBITx constructors has no end.  This 3D printed version of a wired remote head for the µBITx was designed and built by Gel Vega DU2RK and is truly amazing.

The Remote Head incorporates a ring lit rotary encoder and ring-lit volume control, 8 pin microphone jack,  stereo jacks for headphones and key and a 3.5″ Nextion screen.    Now for a wireless version Gel

 

Nextion Display not communicating?

Björn PD5DJ  used his Nextion screen on previous projects, and this changed the fixed baud rate programmed into the unit.  If your Nextion screen was used previously for other projects you may have the same issue.

This problem was fixed by placing the command “bauds=9600” on page 0 in the Preinitialize Event panel.

Tip!, Every Designer should place this in their code.

Reference

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.