Lopy4 issue receiving in a tight loop

[mbyamukama]

I have the following bit of code.

from network import LoRa
import socket
import time
import pycom

# Please pick the region that matches where you are using the device
pycom.heartbeat(False)
lora = LoRa(mode=LoRa.LORA, region=LoRa.EU868, bandwidth=LoRa.BW_250KHZ,coding_rate=LoRa.CODING_4_5,sf=7, tx_power=14,power_mode=LoRa.ALWAYS_ON,preamble=8,
            tx_iq=False, rx_iq=False) # >17000 bps
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
s.setblocking(False)
i = 0
while True:
    data=s.recv(512)
    if len(data)>0:
        print('count {0} value {1} length {2}'.format(i,data,len(data)))
        i = i+1
        pycom.rgbled(0xFFD058)
        time.sleep_ms(2)
        pycom.rgbled(0x000000)
        time.sleep_ms(2)
    time.sleep_ms(1)

I receive data well, except when I comment out the 1ms delay in the while loop. In which case I receive no data at all. The transmissions are happening slowly. About every 1 second.

[Gijs]

Because you have an infinite loop, removing the delay will leave no time for the watchdog timer to trigger, making the device reset internally. You can perhaps use time.sleep_us(...) instead?

Gijs

[mbyamukama]

This post is deleted!

[mbyamukama]

@Gijs Thank you for your response.
Any document I can read more about this?

[Gijs]

Its all in here: https://docs.pycom.io/firmwareapi/micropython/utime/
Note that the 'u' in front of utime can be left when importing, its the same module

Gijs

[mbyamukama]

@Gijs What I meant was any documentation on the watchdog timer versus tight loops.

[Gijs]

Right, we do not have specific documentation on that (yet) I believe, as in my experience its a fundamental feature of microcontrollers in general. Could you recommend a place where you would expect this information?

Gijs