Wires:
The USB-to-serial module should have pins for TX/RX,5V and GND. So take a wire and connect the GND of the module with the trainer port. GND is actually the shield of the socket so stick you wire between the shield and the outer plastic. It stays there don’t worry. Then connect the module’s TX line to the TX line of the trainer port and so on…

Some USB-to-serial modules may have the TX/RX pins reversed, so if you fail to connect try to switch those two.

Hope this helps

Thanks.

really interesting article, one question though will it work with FlySky CT6a

Thanks …

printf sends its output to standard output — console etc in the unix world.

You need a version of printf that does the same formatting but places the result into a string variable rather than sending the result to standard output.
I believe the standard library function sprintf does what you need.

int P;
P = 5;
printf(“%d\n”,P);

LCD5110_send(0×40 + 0, 0);
LCD5110_send(0×80, 0);
LCD5110_sendstring(P);

The build succeeded but LCD outputs nothing. Any tips ? Thanks!

LCD5110_sendstring(“Hello World”);

I would write:

float P=5;
LCD5110_sendstring(P);

and then the LCD should show 5 ?

I don’t have my LCD with me right now but I will in a bit. Let me know if this is the right approach.

Seeing as how P is a float instead of an int, would I need to modify this part of your code:

void LCD5110_sendchar(unsigned char character)
{
unsigned char column = 0;
character = character – 0×20; // 0×20 is the first element of the array

for (column = 0; column < 5; column++) // Pass through each column
{
LCD5110_send(font[(int) character * 5 + column], 1);
}

LCD5110_send(0×00, 1); // Send a small space
}

Thanks for your help!