[andyh2000]

The M5Stack devices really are a nice ecosystem and easy to program in blockly (uiflow) or straight micropython. I've got an Atom Matrix that talks to a Core via local mqtt broker. The Atom acts as a visual remote control and the Core is a free/busy sign for my study door when I'm on work video calls.

I'd been holding off getting an M5Paper as I have drawers full of unused microcontrollers but I feel myself weakening now.



Atom Matrix code (from uiflow):

from m5stack import *
from m5ui import *
from uiflow import *
from m5mqtt import M5mqtt

rgb.set_screen([0,0,0,0,0,0,0xffffff,0,0xffffff,0,0,0,0,0,0,0xffffff,0,0,0,0xffffff,0,0xffffff,0xffffff,0xffffff,0])


current_state = None




# Describe this function...
def set_lights_blue():
  global current_state
  rgb.set_screen([0,0x0000ff,0x0000ff,0,0,0,0,0,0x0000ff,0,0,0,0x0000ff,0,0,0,0,0,0,0,0,0,0x0000ff,0,0])

# Describe this function...
def set_lights_green():
  global current_state
  rgb.set_screen([0,0,0,0,0,0,0,0,0,0x00ff00,0,0,0,0x00ff00,0,0x00ff00,0,0x00ff00,0,0,0,0x00ff00,0,0,0])

# Describe this function...
def set_lights_red():
  global current_state
  rgb.set_screen([0xff0000,0,0,0,0xff0000,0,0xff0000,0,0xff0000,0,0,0,0xff0000,0,0,0,0xff0000,0,0xff0000,0,0xff0000,0,0,0,0xff0000])


def fun__freebusy_check_(topic_data):
  global current_state
  current_state = int(topic_data)
  if current_state == 0:
    set_lights_green()
  else:
    if current_state == 1:
      set_lights_red()
    else:
      set_lights_blue()
  pass

def buttonA_wasPressed():
  global current_state
  if current_state == 0:
    m5mqtt.publish(str('/freebusy'),str('on'))
  else:
    if current_state == 1:
      m5mqtt.publish(str('/freebusy'),str('off'))
    else:
      m5mqtt.publish(str('/freebusy'),str('check'))
  pass
btnA.wasPressed(buttonA_wasPressed)


current_state = -1
m5mqtt = M5mqtt('m5atom_remote', '192.168.1.226', 1883, '', '', 300)
m5mqtt.subscribe(str('/freebusy_check'), fun__freebusy_check_)
m5mqtt.start()
set_lights_blue()
m5mqtt.publish(str('/freebusy'),str('check'))
while True:
  wait_ms(2)

Core code:

from m5stack import *
from uiflow import *
from m5ui import *
import wifiCfg
import socket
from m5mqtt import M5mqtt

want_check = False

def on_msg(payload):
  global want_check
  global state
  led_on = payload.find('on')
  led_off = payload.find('off')
  check = payload.find('check')

  if led_on == 0:
    state = 1
    rgb.setColorAll(0xFF0000)
    setScreenColor(0xFF0000)
    lcd.setBrightness(30)
    rectangle0.show()
    busylabel.show()
    want_check = True
  if led_off == 0:
    state = 0
    rgb.setColorAll(0x000000)
    setScreenColor(0x000000)
    lcd.setBrightness(0)
    rectangle0.hide()
    busylabel.hide()
    want_check = True

  if check == 0:
    want_check = True

state = 0 #state variable for the leds

ip = wifiCfg.wlan_sta.ifconfig()

rectangle0 = M5Rect(0, 0, 318, 240, 0xff0000, 0xFFFFFF)
busylabel = M5TextBox(61, 81, "BUSY", lcd.FONT_DejaVu72,0xFFFFFF, rotate=0)

rgb.setColorAll(0x000000)
setScreenColor(0x000000)
lcd.setBrightness(0)
rectangle0.hide()
busylabel.hide()

m5mqtt = M5mqtt('m5core_free_busy', '192.168.1.226', 1883, 'user', 'pw', 300)
m5mqtt.subscribe("/freebusy", on_msg)
m5mqtt.start()

while True:
  if want_check:
    m5mqtt.publish("/freebusy_check", str(state))
    want_check = False
  wait(1)

Andrew