Getting button pressed number

[Moris526]

Hi all.

Im using Adafruit's Neotrellis led/button board with Python code on Raspberry pi

I want to send, via serial, the button pressed to Pc.

Im new to python so Im using the code from Adafruit

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import time   from board import SCL, SDA import busio from adafruit_neotrellis.neotrellis import NeoTrellis from adafruit_neotrellis.multitrellis import MultiTrellis     i2c_bus = busio.I2C(SCL, SDA)     trelli = [     [NeoTrellis(i2c_bus, False, addr=0x2E), NeoTrellis(i2c_bus, False, addr=0x2F)],     [NeoTrellis(i2c_bus, False, addr=0x30), NeoTrellis(i2c_bus, False, addr=0x31)], ]   trellis = MultiTrellis(trelli)     OFF = (0, 0, 0) RED = (255, 0, 0) YELLOW = (255, 150, 0) GREEN = (0, 255, 0) CYAN = (0, 255, 255) BLUE = (0, 0, 255) PURPLE = (180, 0, 255)     def blink(xcoord, ycoord, edge):     # turn the LED on when a rising edge is detected     if edge == NeoTrellis.EDGE_RISING:         trellis.color(xcoord, ycoord, BLUE)     # turn the LED off when a rising edge is detected     elif edge == NeoTrellis.EDGE_FALLING:         trellis.color(xcoord, ycoord, OFF)     for y in range(8):     for x in range(8):         # activate rising edge events on all keys         trellis.activate_key(x, y, NeoTrellis.EDGE_RISING)         # activate falling edge events on all keys         trellis.activate_key(x, y, NeoTrellis.EDGE_FALLING)         trellis.set_callback(x, y, blink)         trellis.color(x, y, PURPLE)         time.sleep(0.05)   for y in range(8):     for x in range(8):         trellis.color(x, y, OFF)         time.sleep(0.05)   while True:          trellis.sync()     time.sleep(0.02)

I try this

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def blink(xcoord, ycoord, edge):     # turn the LED on when a rising edge is detected     if edge == NeoTrellis.EDGE_RISING:          ser.write(b'xcoord')       # turn the LED off when a rising edge is detected     elif edge == NeoTrellis.EDGE_FALLING:         trellis.color(xcoord, ycoord, OFF)

But i get ¨xcoord¨ printed on PC.

I try

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def blink(xcoord, ycoord, edge):     # turn the LED on when a rising edge is detected     if edge == NeoTrellis.EDGE_RISING:              ser.write(b'x')       # turn the LED off when a rising edge is detected     elif edge == NeoTrellis.EDGE_FALLING:         trellis.color(xcoord, ycoord, OFF)

and I get ¨x¨ printed on PC

My question: How do I get the button pressed number?

[bowlofred]

Probably something like
ser.write(str(xcoord).encode())

[Moris526]

Probably something like
ser.write(str(xcoord).encode())

Yes. Almost there.
I try with print first and worked.
I need both x and y
so I try

1	print(str(xcoord).encode(),str(ycoord).encode())

And worked too.
Then I try

1	ser.write(str(xcoord).encode(),str(ycoord).encode())

And I get

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t.callbacks[evt.number](x,y,evt.edge) ser.write(str(xcoord),encode(),str(ycoord).encode()) TypeError: write() takes 2 positional arguments but 3 were given

[bowlofred]

write() normally takes a single object at a time. If you want to write two things, either combine them into a single object, or perform two writes.

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# two things separated by a space ser.write(f"{xcoord} {ycoord}".encode())   # two consecutive writes (no space separates the data elements) ser.write(str(xcoord).encode()) ser.write(str(ycoord).encode())

[Moris526]

Thank you.

That worked!!