uPython syntax errors
Posted: Mon Aug 26, 2019 3:47 pm
I use uPyCraft on a esp8266 board. I am working with an mqtt example for uPython i adapted to publish a simple message when light levels drops below a given threshold but i get this error:
exec(open(‘main.py’).read(),globals())
Traceback (most recent call last):
File “<stdin>”, line 1, in <module>
File “<string>”, line 43
SyntaxError: invalid syntax
Below is my main code.
exec(open(‘main.py’).read(),globals())
Traceback (most recent call last):
File “<stdin>”, line 1, in <module>
File “<string>”, line 43
SyntaxError: invalid syntax
Below is my main code.
Code: Select all
from machine import Pin, ADC
from time import sleep
ldr = ADC(0)
def sub_cb(topic, msg):
print((topic, msg))
if topic == b'notification' and msg == b'received':
print('ESP received hello message')
def connect_and_subscribe():
global client_id, mqtt_server, topic_sub
client = MQTTClient(client_id, mqtt_server)
client.set_callback(sub_cb)
client.connect()
client.subscribe(topic_sub)
print('Connected to %s MQTT broker, subscribed to %s topic' % (mqtt_server, topic_sub))
return client
def restart_and_reconnect():
print('Failed to connect to MQTT broker. Reconnecting...')
time.sleep(10)
machine.reset()
try:
client = connect_and_subscribe()
except OSError as e:
restart_and_reconnect()
while True:
ldrValue = ldr.read()
print(ldrValue)
sleep(0.1)
if ldrValue >= 350
msg = b'laser0 #%d' % counter
client.publish(topic_pub, msg)
last_message = time.time()
counter += 1
except OSError as e:
restart_and_reconnect()