Arduino Pro Mini + Lmic+OTAA with Multi Channel Gateway

End Devices (Nodes) LMIC
15

Thank @arjanvanb for making it clear.
@danielpardede In fact, I did not modify lorabase.h by myself.
There is an example on https://github.com/orenonline. Look at “arduino-lmic-as923
Added AS923 code into LMIC”. It might answer what you try to ask.

Somsak

16

thanks @arjanvanb @Somsak , it is clear now.

1 Like
17

Hi i am also using Arduino Pro Mini +Lmic(otaa) by node is working and serial monitors show
message queued
EV_JOINING
and noting else, may there is no Gateway nearby also my console device status is “not seen”
and data uplink bytes.

What is this problem?? please help

18

like you wrote … ’ maybe there is no Gateway nearby

19

so i must have my own gateway???

20

if you want to be 100% sure to connect to The Things Network… yes.
even if there is a GW nearby (and there is one… see map in your console) it’s not sure that it receives your nodes signal.
and the owner can switch it on/off whenever he wants.

see also https://www.thethingsnetwork.org/docs/

21

i understand, is there any way to test my device working correctly?

22

without to be sure that a (TTN !) gateway is within range, is listening and forward your data So you can see in your console’s application tab, that your node is actually transmitting and trying to join the network (yellow thunder) … no that will be difficult.

beside the question of a gateway in range, there could be all kinds of other little 'problems.

be it mechanical … like the antenna.
or electrical… like wrong connections.
or wrong keys in your software setup and application

23

hi, today i have tested my node (Adruino mini +Hope RF95 + limc)
node works good when its still on one place , and stops sending packets to console when i start moving with this node device in my room.

What is this kind of problem???
any one help?

24

can you show some packets received by your gateway / application ?

25

packet-loss-ttn

26

i have interval of 6m

27

I mean with the metadata visible (click on one of the blue arrows pointing upwards)
do you have your own gateway now ?

28

i dont have my own gateway its one somebody else gateway that my device of connected.

29

ttn-metadata

this is metadata

30

OK so you are transmitting with SF7 and that gateway is receiving your weak signal of RSSi -120 / SNR -5.

Then it’s indeed possible, that when you are moving the node (for example to the other side of a room) the signal gets to weak for the gateway.

several things to try first:

  • get the node to a higher point
  • get a better antenna on the node
  • increase the Spreading Factor from 7 to 8/9
  • get a gateway yourself
1 Like
31

thanks for your advise could you please also advise me a way to use my RF95 modem with full strength
if possible what is the coding ,

32

but what type of data are you transmitting and is your node always moving or just now for testing ?

33

need to TX longi and Lati and speed on ground from GPS sensor/
this is a position tracker device (Always moving on roads)

34

but now you’re focussing on one gateway, you should test the node and drive around.
have you any idea how far that receiving gateway is from your location ?