Not able to receive downlink data on LoPy

[SameerChouksey]

Hello,

I am using LoPy module to send and receive data over LoRa. I am able to send data successfully but can not receive the LoRa data. Below is the code I am using to receive data. Please check.

s.setblocking(False)

while(1):
data = s.recv(64)
if(data):
print("Received data: "+str(data))

Regards
Sameer

[rskoniec]

@sameerchouksey Did you try this example https://docs.pycom.io/chapter/tutorials/lora/lorawan-otaa.html ?

Especially:

# make the socket blocking
# (waits for the data to be sent and for the 2 receive windows to expire)
s.setblocking(True)

# send some data
s.send(bytes([0x01, 0x02, 0x03]))

# make the socket non-blocking
# (because if there's no data received it will block forever...)
s.setblocking(False)

# get any data received (if any...)
data = s.recv(64)
print(data)

Also try to upgrade FW to 1.17.x (lorawan have changed to 1.0.2 spec).

[robert-hh]

@sameerchouksey Did you try to send an uplink message before waiting for a downlink message, according to the LoRa spec?
You can also try arw LoRa mode, which does not require an uplink message before a downlink message.

[SameerChouksey]

• I am using it with an established LoRa infrastructure and I am able to send data successfully.

• The node is set to LoRa WAN mode and Device is operating in class C mode.

• The version info: (sysname='LoPy', nodename='LoPy', release='1.16.0.b1', version='v1.8.6-849-055728a on 2018-02-13', machine='LoPy with ESP32', lorawan='1.0.0')

P.S. I tried hard resetting the device but it doesn't help.

Regards,
Sameer

[robert-hh]

@sameerchouksey Just a hint:
start a script with Lora always after a full reset. Soft reset does not reset the Lora device properly.
Full reset is done by pushing the reset button or calling machine.reset()

[robert-hh]

@sameerchouksey Some questions:

• are you using it with TTN or with some other software?
• is the node set to LORA raw mode or to LoRa WAN mode?
• What is thr revision of your firmware?