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.