Touch pHAT: auto_leds

Support
1

Hi,
I got a script to to:

  • Control the leds of the Touch pHAT via mqtt as mqtt switches
  • send a payload via mqtt upon touch of the button

now the issue I have is that upon touching, the led turn on, and then off upon release, independently of the previous status of the led that was changed via mqtt.

how can i disable that? i would like the leds to be disconnected from the capacitive control.

thanks!

import threading
import paho.mqtt.client as mqtt
import time
import touchphat

touchphat.all_on()
back_status = 0
a_status = 0
b_status = 0
c_status = 0
d_status = 0
enter_status = 0

def on_connect(client, userdata, flags, rc):
    print("Connected with result code "+str(rc))
    client.subscribe('touchphat/cmd/back')
    client.subscribe('touchphat/cmd/a')
    client.subscribe('touchphat/cmd/b')
    client.subscribe('touchphat/cmd/c')
    client.subscribe('touchphat/cmd/d')
    client.subscribe('touchphat/cmd/enter')


# Set up and connect to MQTT broker
client = mqtt.Client(protocol=mqtt.MQTTv31)
client.username_pw_set("*********", password="************")
client.on_connect = on_connect
client.on_message = on_message
client.connect("************", 1883, 60)
print("Running...")
client.publish("touchphat/MQTTclient/state", "ON")


@touchphat.on_touch(['Back', 'A', 'B', 'C', 'D', 'Enter'], handler=None)
def handle_touch(event):
    client.publish("touchphat/touch", event.name)
    print(event.name)

client.loop_forever()
2

I would think that function is in the init file. You’ll likely have to find it and edit it?
touch-phat/init.py at master · pimoroni/touch-phat (github.com)

3

Thank you alpha, does it mean to set them to false


auto_leds = False

And / or to comment as below

def _handle_press(event):
    global _on_press
    channel = event.channel
    event.name = NAMES[channel]
    event.pad = NUMMAP[channel]

#    if auto_leds:
#        captouch.set_led_state(LEDMAP[channel], True)

    if callable(_on_press[channel]):
        try:
            _on_press[channel](event)
        except TypeError:
            _on_press[channel]()


def _handle_release(event):
    global _on_release
    channel = event.channel
    event.name = NAMES[channel]
    event.pad = NUMMAP[channel]

#    if auto_leds:
#        captouch.set_led_state(LEDMAP[channel], False)

    if callable(_on_release[channel]):
        try:
            _on_release[channel](event)
        except TypeError:
            _on_release[channel]()

I did set auto_led = False on top of my script.

I also cloned into touch-phat, changed auto_leds to False, and python install it, but did not work: did this should have sorted any effect?

I did not try to comment the specific auto_leds lines yet.

Thank you for your support.

4

That I don’t know? It’s just a hunch, if I’m honest. It’s what I would look at if it was me. I don’t own one so your a bit on your own.

5

I edited the library in


/usr/local/lib/python/dist-packages/touchphat/__init__.py

with


auto_leds = False

and it worked. Not sure why would not work on top of my script

6

Might be how things are called up, order wise? What was in that file overrided what you did in your file.