I have several AK-3232 boards which I am using with a Pine64-LTS uart ports which operate at 3.3V.
One of them is connected to 3.3V Vcc and a Garmin 18x-LVS GPS receiver which works great! RS232 from the receiver to the uart TTL Rx/Tx pins and also the PPS signal to the CTS pin.
The other 3 AK-3232 boards are connected to Newhaven LCD displays:
Currently I am trying to find out from Newhaven if the LCD is RS232 or TTL as the manual and specs both say RS232 then have TTL listed in brackets (very confusing!).
If the voltage levels are TTL then what would be the correct level shifter board to go for to drive the displays?
I am looking at the TXS0108 V2. Would that be a good solution?
Virtually I would need to amplify the 3.3V signal to 5V if the LCD is in fact TTL. It actually most likely is the case as currently sending the command set to it doesn’t seem to function as expected so the display is probably struggling with the RS232 signal generated by the AK-3232.
What would you advise? Thanks