TM1650 Arduino library for 2 x 8 led display

RE: TM1650 Arduino library for 2 x 8 led display

shabaz — Tue, 25 Apr 2023 17:16:26 GMT

It's possible that the receive function may be for keypad entry (the TM1650 chip can be wired to a keypad), rather than retrieving the LED segments that are lit. It would need the source code to be examined to identify this for sure. In any case, if you wish to retain knowledge of what the TM1650 was instructed to display, then that can be done with a variable within your Arduino code, i.e. store it in RAM on the Arduino nano's microcontroller. That way there's no need to query the TM1650 chip.

RE: TM1650 Arduino library for 2 x 8 led display

stealthrt — Tue, 25 Apr 2023 16:38:19 GMT

Thanks for the reply shabaz I found some code that works a little. Still trying to find an example of how to go about reading what's on the led segment screen. I see there is a receive() function but no examples on how to go about using it.

RE: TM1650 Arduino library for 2 x 8 led display

shabaz — Sun, 23 Apr 2023 16:39:08 GMT

Hi, I don't get the issue. You can leave it at 4x8 or 4x7 and just write two digits. For instance if you wish to write the number 42 then try writing 42 or 0042, or try writing 4200 and see which works.

The animated GIF is not very helpful, there is poor contrast without a filter, also if you can just indicate in a photo or diagram which segments are lighting up for some example digits. Then that may help make things easier.

If you're finding that incorrect segments are lighting that do not resemble digits at all, then the manufacturer of the board that you're using has mapped segments differently to what the library uses. You'd need to then make changes to the library code.