UIFlow Guide
Connect to an MQTT server via LAN module, subscribe and publish messages, and poll for downlink messages to control device states (e.g., turning a relay on/off).
from m5stack import *
from m5ui import *
from uiflow import *
import module
import time
setScreenColor(0x810000)
lan_topic = None
lan_msg = None
lan = module.get(module.LAN_MODULE)
label2 = M5TextBox(53, 219, "ON", lcd.FONT_DejaVu18, 0x810000, rotate=0)
label3 = M5TextBox(230, 219, "OFF", lcd.FONT_DejaVu18, 0x810000, rotate=0)
def module_lan_mqtt_cb(lan_mq_topic, lan_mq_payload):
global lan_topic, lan_msg
lan_topic = lan_mq_topic
lan_msg = lan_mq_payload
print(lan_msg)
pass
lan.lan_init(18, 23, 19, 5, 0, 35)
print('Lan Init')
wait(1.5)
lan.mqtt_config('mqtt.m5stack.com', 1883, 'm5mqttid', '', '', 120)
print('Mqtt Configured')
wait(1.5)
lan.mqtt_connect()
print('Connect Server')
wait(1.5)
lan.mqtt_subscribe('m5stack/relay', module_lan_mqtt_cb, 0)
while True:
lan.mqtt_publish('m5stack/relay', 'ON', 0)
wait(1.5)
lan.mqtt_poll_loop()
if False:
print('ON')
else:
print('OFF')
wait_ms(2)
<img class="blockly_svg" src=" https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/static/assets/img/uiflow/blockly/modules/lan
/uiflow_block_module_lan_udp_receive_packet.svg">