i use this shield
you can read the schematic of shield,
In the shield i disable tx echo and consigure in this way the SWN, put up on the 1 and put up off 2 and 3
i use pin 12, 11, 9, 8, 7, 6 for lcd LCM1602C for read value
i use this shield
you can read the schematic of shield,
In the shield i disable tx echo and consigure in this way the SWN, put up on the 1 and put up off 2 and 3
i use pin 12, 11, 9, 8, 7, 6 for lcd LCM1602C for read value