asynchronous code

[sgrobler]

I had a go at using AsyncW1ThermSensor to collect data asynchronously from a GPS running at a "fast" rate without having to wait for multiple "slow" DS18B20's to return their readings. I put the code for each DS18B20 into its own function. Ideally it would be nice to handle multiple DSB1820's in one function. Any tips on how to do that? Here is my code:

Basic idea for async functions from: https://www.geeksforgeeks.org/how-to-run-two-async-functions-forever-python

import asyncio, time, datetime
from w1thermsensor import AsyncW1ThermSensor, Sensor

Tamb = 0
Tchg = 0

# DS18B20 sensor ID's, determined from CLI
sensTamb = AsyncW1ThermSensor(sensor_type=Sensor.DS18B20,sensor_id="3c01d607c976")
sensTchg = AsyncW1ThermSensor(sensor_type=Sensor.DS18B20,sensor_id="3c01f095129f")

# first temp sensor
async def readTamb():
    global Tamb
    while True:
        try:
            Tamb = await sensTamb.get_temperature()
            print(" ---Got new Tamb=%.2f %s" % (Tamb,datetime.datetime.now().strftime("%H:%M:%S.%f")))
        except:
            print('reading Tamb failed.... try again')

# second temp sensor
async def readTchg():
    global Tchg
    while True:
        try:
            Tchg = await sensTchg.get_temperature()                   
            print(" ---Got new Tchg=%.2f %s" % (Tchg,datetime.datetime.now().strftime("%H:%M:%S.%f")))
        except:
            print(' ---reading Tchg failed.... try again')

# read GPS
async def readGPS():
    i = 0 # counter for info
    while True:
        i += 1
        await asyncio.sleep(0.2) # dummy wait to simulate reading GPS 
        print('got GPS scan #%3d      %s ' %(i,datetime.datetime.now().strftime("%H:%M:%S.%f")))
        await readADC()
        await writeLog()

# read ADC        
async def readADC():
    await asyncio.sleep(0.1) # dummy wait to simulate reading ADC's
    print(" -got ADC")
    
async def writeLog():
    await asyncio.sleep(0.1) # dummy wait to simulate writing to file
    print(" --log written")
    
loop = asyncio.get_event_loop()
asyncio.ensure_future(readTamb())
asyncio.ensure_future(readTchg())
asyncio.ensure_future(readGPS())
loop.run_forever()