Waiting for Downlinks
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Downlinks can occur in two windows, RX1 and RX2. In order to be able to receive downlinks in RX2, deep sleep should be delayed after an uplink.
The total waiting time can be calculated by RECEIVE_DELAY1 + RECEIVE_DELAY2 + airtime of largest possible packet + processing time by lopy stack before lora event callback is called, correct?
So in order to wait for the downlink, what method should be used? I tried to sleep with
utime.sleep_ms(4000)right after sending the uplink, but it appears that in that case no downlinks can be received. (On the other hand, when testing manually in the REPL, downlinks arrived fine just after sending an uplink.)