Trying to build a gps tracker sending coords via lorawan!
When learning from you, I found asyncio. So an explendid idea putting the gps read(every second) and lora write(every ~minute) in the event loop!
So I code the gps read using the "task = asyncio.create_task(receiver(gnssData))" and look working ok (code attached and comments are welcome)
Then I reach most of the lora libraries around! I am able to see some "sleeps" mostly to get the hardware up, but my concern is how to make the spi.write asynchronous! thinking thats the blocking part of the code (correct-me if I am wrong). Anyway to make it async? Any async libraries around?
I already have lora working with synchronous code apart from the gps code and I noticed its hard to debug (I see no acknowledge from the gateway)!
Any Help? regards,
Code: Select all
### main.py (using heltec wireless stick)
import uasyncio as asyncio
from gps import receiver
gnssData = {}
async def main():
task = asyncio.create_task(receiver(gnssData))
while True:
await asyncio.sleep(1)
print('main', gnssData)
asyncio.run(main())
### gps.py
import uasyncio as asyncio
import re, utime
from machine import UART
u2 = UART(2, 9600, tx=17, rx=22) # changing pins to make oled available
u2.init(9600, bits=8, parity=None, stop=1)
def parseGNRMC(line, gnssData):
if re.match(r'\$GNRMC', line):
arr = line.decode().strip('\r\n').split(',') # gps line to array
gnssData['vel'] = float(arr[7]) * 1.852 # velocity (km/h)
gnssData['hea'] = float(arr[8]) # heading (deg)
gnssData['lat'] = (int(arr[3][0:2]) + (float(arr[3][2:8]) / 60)) * (1 if arr[4] == 'N' else -1)
gnssData['lng'] = (int(arr[5][0:3]) + (float(arr[5][3:8]) / 60)) * (1 if arr[6] == 'E' else - 1)
async def receiver(gnssData):
sreader = asyncio.StreamReader(u2)
while True:
res = await sreader.readline()
parseGNRMC(res, gnssData)
