An eBay seller sent me an HC-05 (cheap Bluetooth module for AVR, www.hc01.com/en) by mistake. I wonder if it would be possible to use it to send some output from the TT to a smartphone for display. There is an Android app specifically for using the HC-05.
On the K firmware, you just need to enable the UART on the firmware and you are good to go,see attached pictures.
I use the serial output to log some measurement and I made a small Processing sketch to display the measurements on a PC monitor.
To simplify the code, I changed the firmware to send on the UART the line number of each text string and a "new_line" = ("\r\n") at the end of each line.
I posted some detail one year ago in the following message and I hope
Karl-Heinz will add this changes in the main firmware
https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/msg875362/#msg875362.
Now I fugured out how to wrap the text of the Selection menu...
If someone is interested I attached the custom firmware for the M12864 DIY Kit and the Processing sketch.
I'm also developing a small android app to log the measurements on a phone
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If you improve the Processing sketch (at the moment it can handle correctly only some of the measurements), or you are developing an app, please share it so this can become a nice addition to this super useful tool.
Mauro