030_esp32_mpython - kotaproj/study_zenpan GitHub Wiki

mqttを使う

from umqtt.simple import MQTTClient
import time

# Test reception e.g. with:
# mosquitto_sub -t foo_topic

SSID = "XXXXXXXXXXXXXXXXXXX"
PASS = "XXXXXXXXXXXXXXXXXXX"

def do_connect():
    
    import network
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print('connecting to network...')
        # wlan.connect('essid', 'password')
        wlan.connect(SSID, PASS)
        while not wlan.isconnected():
            pass
            # time.sleep(1)
            time.sleep(3)
            print(".")
    print('network config:', wlan.ifconfig())
    return


TOPIC = b"topic_1"
MESSAGE = b"from_esp32"




def main(server="localhost"):

    do_connect()

    # c = MQTTClient("umqtt_client", server, ssl=True)
    c = MQTTClient("umqtt_client", server)
    c.connect()
    c.publish(TOPIC, MESSAGE)
    c.disconnect()

if __name__ == "__main__":
    main()

i2cを使う

https://note.com/upyc101/n/n07b92cb2e8e8

初期化

from machine import Pin, I2C
PIN_SCL = 22
PIN_SDA = 21
bus = machine.I2C(scl=machine.Pin(PIN_SCL), sda=machine.Pin(PIN_SDA))

devadr=42, regadr=2に0x10をライト

i2c.writeto_mem(42, 2, b'\x10')

devadr=0x3A, regadr=8に3byteリード

i2c.readfrom_mem(0x3a, 8, 3) 

deepsleep関連

• https://qiita.com/taka-murakami/items/0d2b4734b08516135d74
• https://qiita.com/azusa9/items/65a5c3772c41631b5ca1
• https://www.programcreek.com/python/example/101397/machine.deepsleep

wifi

https://note.com/upyc101/n/n0d052c0bf51c

ntp

https://note.com/upyc101/n/n5fc3352d349f

micropython組み込み関数, 例外

https://micropython-docs-ja.readthedocs.io/ja/latest/library/builtins.html