111 lines
2.7 KiB
Python
111 lines
2.7 KiB
Python
import time
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import network
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import socket
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import ubinascii
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from machine import Pin, I2C
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import micropython_mcp9808.mcp9808 as mcp9808
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from secrets import secrets
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GET_PATH_START = 4
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POST_PATH_START = 5
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led = Pin('LED', Pin.OUT)
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def blink_onboard_led(num_blinks):
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for i in range(num_blinks):
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led.value(1)
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time.sleep_ms(200)
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led.value(0)
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time.sleep_ms(200)
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blink_onboard_led(1)
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sdaPIN=Pin(20)
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sclPIN=Pin(21)
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i2c=I2C(0,sda=sdaPIN, scl=sclPIN, freq=200000)
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devices = i2c.scan()
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if len(devices) != 0:
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print('Number of I2C devices found=',len(devices))
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for device in devices:
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print("Device Hexadecimel Address=",hex(device))
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else:
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print("No device found")
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mcp9808 = mcp9808.MCP9808(i2c)
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ssid = secrets['ssid']
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password = secrets['pw']
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wlan = network.WLAN(network.STA_IF)
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wlan.active(True)
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wlan.connect(ssid, password)
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max_wait = 10
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while max_wait > 0:
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if wlan.status() < 0 or wlan.status() >= 3:
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break
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max_wait -= 1
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print('waiting for connection...')
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time.sleep(1)
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ip = "???"
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if wlan.status() != 3:
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blink_onboard_led(3)
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raise RuntimeError('network connection failed')
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else:
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print('connected')
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status = wlan.ifconfig()
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ip = status[0]
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print( 'ip = ' + ip )
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wlan_mac = wlan.config('mac')
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mac_readable = ubinascii.hexlify(wlan_mac).decode()
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blink_onboard_led(2)
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addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
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s = socket.socket()
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s.bind(addr)
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s.listen(1)
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print('listening on', addr)
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def result_ok(cl, response = None, content_type = "text/plain"):
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cl.send('HTTP/1.0 200 OK\r\nContent-type: ' + content_type + '\r\n\r\n')
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cl.send(response if response is not None else "Ok")
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cl.close()
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def result_notfound(cl, response = None):
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cl.send('HTTP/1.0 404 NotFound\r\nContent-type: text/plain\r\n\r\n')
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cl.send(response if response is not None else "Not Found")
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cl.close()
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while True:
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cl, addr = s.accept()
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try:
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print('client connected from', addr)
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request = cl.recv(1024)
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request = str(request)
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request = request[2:-1] # remove b' and ' from string
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print(request)
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if request.find('/ ') == GET_PATH_START:
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temp = str(mcp9808.temperature)
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result_ok(cl, "{ \"temperature\": \"" + temp + "\" }", 'application/json')
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elif request.find('/prometheus') == GET_PATH_START:
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temp = str(mcp9808.temperature)
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content = """# HELP temperature Temperature in Celsius
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# TYPE temperature gauge
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temperature{mac=\"""" + mac_readable + "\",ip=\""+ ip +"\"} " + temp
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result_ok(cl, content)
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else:
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result_notfound(cl)
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except OSError as e:
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cl.close()
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print('connection closed') |