How to p2p btw two MKRWAN boards ?

[yijenlu1971]

I have two arduino MKRWAN 1300, and want to send & receive by point to point. One board I loaded DumbModemLoRaSender, the other board I loaded LoRaReceiver. But, the receiver can't get anything. Please give me help, thanks.

[facchinm]

Hi @yijenlu1971 ,
using @sandeepmistry 's LoRa library (https://github.com/sandeepmistry/arduino-LoRa) version 0.5.0 you already have everything you need; launch LoRaReceiver on one board and LoRaSender on the other and it should be already working.
Two tips: remove the boards from the foam, otherwise there could be little short cicuits between the pins that make it behave "randomly".
Then, make sure the firmware version of LoRa modules is up to date (using MKRWANFWUpdate_standalone example).
Let me know if it works!

[yijenlu1971]

Thanks your suggestion. It works now.
Try to debug. I put LED indicator to LoRaSender. When it send out, LED will flash. So, I found the board's not running at standalone. Now, both boards are loaded before running. It seems UART is a trigger to make arduino-mkrwan run or wakeup, is that right ??

[facchinm]

@yijenlu1971 I'm happy it works! The serial "trigger" is due to this line

https://github.com/sandeepmistry/arduino-LoRa/blob/master/examples/LoRaReceiver/LoRaReceiver.ino#L6

that stops the execution until you open the serial port

[yijenlu1971]

Thanks very much.

[bradtothebone]

same thing but I get: Starting LoRa failed!

I tried checking the freq was correct (in lorawan more this needs to be US915):
if (!LoRa.begin(915)) {
Serial.println("Starting LoRa failed!");

I did update the firmware with the standalone sketch too, maybe incorrectly? I get version 2 something and the directions say min is 1.1.6:

Any ideas? Thanks

Device : ATSAMD21G18A
Chip ID : 10010005
version()=v2.0 [Arduino:XYZ] Nov 13 2017 18:12:39
Version : v2.0 [Arduino:XYZ] Nov 13 2017 18:12:39

[facchinm]

Hi @bradtothebone ,
you need to open the serial monitor after flashing the standalone updater for it to apply.
Then, using LoRa library >= 0.5.0 you'll be able to talk with the chip.

[bradtothebone]

Thanks.. I basically mixed up which chips I had flashed. few of them on the desk, one on a breadboard as a module. phew, I thought I had killed it by having the antenna off!

[rafaelcastellar]

Hi guys!

I'm stuck here with my two MKRWAN1300 p2p. I did what you said here, but I'm still getting the "Starting LoRa failed!" error.

I had updated the firmware from sandeepmistry sketch (MKRWAN has mlm32l07x01_bin_len error - not declared in the scope)
I'm running sandeepmistry Sender and Receiver sketches, both are giving me this messages.

A dumb question: the devices need to be wired? I'm just trying them wired in nothing but the usb cable to my computer.
The "First config" example from MKRWAN works fine, so I thought it is not a hardware problem..anyway, I don't know how to have them working.

Any help?

Tks!!

[facchinm]

The error while compiling FwUpdater is not a good sign, are you sure you have downloaded the whole MKRWAN library? Once updated, there's no special wiring to do, just use Sandeep's library (at least version 0.5) and you should be ok.

[rafaelcastellar]

Hi FAcchinm!
I was able to update just with Sandeep's sketch, the erro variable scope erro I was getting from MKRWAN library. But you were right, something was missing. I removed it and downloaded again and now this updated worked as Sandeep's:

13:06:20.956 ->  Wrote and verified address 0x08012b00 (99%)
13:06:21.023 ->  Wrote and verified address 0x08012c00 (99%)
13:06:21.090 ->  Wrote and verified address 0x08012d00 (100%)
13:06:21.156 ->  Done.
13:06:21.156 -> 
13:06:21.156 -> Starting execution at address 0x08000000... done.
13:06:21.156 -> Flashing ok :)
13:06:22.022 -> ARD-078 1.1.9

But when I run the Sandeep's LoRaSender.ino I still get this error:

13:10:18.003 -> LoRa Sender
13:10:18.454 -> Starting LoRa failed!

I'm pretty sure I am doing something wrong once it happens with my two boards.
Tks

[superkalt]

hi,
firmware 1.1.9 works
mabye you try to connect to a TTN Gateway? So you know that´s the Gateway is ok and working.

[rafaelcastellar]

I Superkalt! I will try it later, right now I'm not covered by any gateway.

Tks

[rafaelcastellar]

Hi Superkalt. I tried but it seems not ok. Don't know if I set everything right. I used the correct keys created in TTN and I should be covered by a gate right now.
That's the logs:

21:43:10.303 -> TTN Mapper fuer Muenchen
21:43:10.303 -> Device: MUMAP-00
21:43:11.131 -> Version: ARD-078 1.1.9
21:43:11.230 -> Device EUI: a8610a30373c6001
21:43:11.230 -> Verbindung mit ABP Mode
21:43:11.330 -> Verbindung zum TTN Netzwerk hergestellt
21:43:16.301 -> Start loop
21:43:16.301 -> Loop:0
21:43:16.301 -> D:0|C:1|P:3
21:43:16.301 -> Daten senden
21:43:16.334 -> ABP => Anpassung moeglich
21:43:16.334 -> Auswertung der Fehler
21:43:16.334 -> 11 > Nachricht gesendet
21:43:16.334 -> Daten empfangen nach 1 Sekunde Pause
21:43:18.355 -> Keine Daten erhalten
21:43:18.355 -> Pause 120 Sekunden0|5|10|15|20|25|30|35|40|45|50|55|60|65|70|75|80|85|90|95|100|105|110|115|120|
21:45:23.280 -> Loop:1
21:45:23.280 -> D:1|C:1|P:3
21:45:23.280 -> Daten senden
21:45:23.280 -> ABP => Anpassung moeglich
21:45:23.321 -> Auswertung der Fehler
21:45:23.321 -> 11 > Nachricht gesendet
21:45:23.321 -> Daten empfangen nach 1 Sekunde Pause
21:45:25.302 -> Keine Daten erhalten
21:45:25.302 -> Pause 120 Sekunden0|5|10|15|20|25|30|35|40|45|50|55|60|65|70|75|80|85|90|95|100|105|110|115|120|

Should I specify any code related to the gate? I should be covered by this gate: eui-b827ebfffede01eb from this https://www.thethingsnetwork.org/community/saopaulo/ here in São Paulo, Brazil.
Oh, it is raining heavly here and I'm indoor.

Is this log enough to determine if there are problems with the boards to get them working in P2P mode?

Tks agains!

[superkalt]

it looks fine. Please check the OTAA Mode. if this Mode is working the Board and the cover is ok.
you need a script with english logging?