[riot-users] Send UDP packet by Xbee

tiago carvalho tiago_carvalho_1 at hotmail.com
Sun Feb 25 20:22:22 CET 2018


Hello,

I noticed that the device sending the packet doesn’t use 6lowpan (DEBUG("6lo: GNRC_NETDEV_MSG_TYPE_SND received\n") doesn’t appear) but on the other device, when the message arrives and after decoding, the 6lo logic is called giving the following error:

                [xbee] isr: data available, waiting for read
                [xbee] recv: reading size without dropping: 69
                [xbee] recv: consuming packet: reading 69 byte
                [xbee-gnrc] recv: successfully parsed packet
                6lo: GNRC_NETDEV_MSG_TYPE_RCV received
                6lo: dispatch 0hx ... is not supported
                6lo: waiting for incoming message.

I’m trying to run 6lowpan but it seems that it is not executed on the sending side. Do I need extra configuration? I already have:

USEMODULE += gnrc_netdev_default
USEMODULE += auto_init_gnrc_netif
USEMODULE += gnrc_ipv6
USEMODULE += gnrc_sock_udp
USEMODULE += gnrc_udp

Thank you,
Tiago

De: tiago carvalho<mailto:tiago_carvalho_1 at hotmail.com>
Enviado: Sunday, February 25, 2018 5:53 PM
Para: RIOT OS users list<mailto:users at riot-os.org>
Assunto: Re: [riot-users] Send UDP packet by Xbee

Hi Martine,

It solved the issue! Thank you for your advice.

I’m now sending packets by Xbee.

Now I have the inverse problem: A UPD packet arrives on the other device and is properly decoded:

                [xbee] isr: data available, waiting for read
                [xbee] recv: reading size without dropping: 85
                [xbee] recv: consuming packet: reading 85 byte

It contains the correct destination IPv6 address but nothing happens before the mentioned debugs. Did I miss any netdev configuration? I already have a running UDP server as described in the examples.

Thank you,
Tiago

De: Martine Lenders<mailto:mail at martine-lenders.eu>
Enviado: Sunday, February 18, 2018 8:15 PM
Para: RIOT OS users list<mailto:users at riot-os.org>
Assunto: Re: [riot-users] Send UDP packet by Xbee

Hi,

Mh, curious, the bug of Xbee that I was thinking of shouldn't have been in effect at this point, but regardless it might be a good idea to get to current master or the current release (2018.01), since the version you are using is almost a year old.

Cheers,
Martine

2018-02-18 20:01 GMT+01:00 tiago carvalho <tiago_carvalho_1 at hotmail.com<mailto:tiago_carvalho_1 at hotmail.com>>:
Hello Martine,

Thank you for your answer. Im on:

SHA-1: 993ed203b53cd5418257c97fecddc1802ff3c96b

* Merge pull request #6947 from kaspar030/fix_NULL_zero_checks

>From 4/21/2017

Is that xbee fix available at this point?

Cheers,
Tiago Carvalho

De: Martine Lenders<mailto:mail at martine-lenders.eu>
Enviado: Sunday, February 18, 2018 4:53 PM
Para: RIOT OS users list<mailto:users at riot-os.org>
Assunto: Re: [riot-users] Send UDP packet by Xbee

Hi Tiago,

can you tell us on which git revision you are on? There used to be a bug in xbee, pretty much as you described, but that should be fixed as of the latest release (and in current master).

Cheers,
Martine

2018-02-18 11:47 GMT+01:00 tiago carvalho <tiago_carvalho_1 at hotmail.com<mailto:tiago_carvalho_1 at hotmail.com>>:
Hey guys,

I’m trying to send a UDP packet but the xbee module is not invoked.

I’m using a mbed lpc1768 board with a Xbee radio and the ‘ps’ output is the following:

> ps
        pid | name                 | state    Q | pri | stack ( used) | base       | current
          - | isr_stack            | -        - |   - |   512 (  336) | 0x100000c8 | 0x10000290
          1 | idle                 | pending  Q |  15 |   256 (  128) | 0x1000050c | 0x1000058c
          2 | main                 | running  Q |   7 |  1536 (  732) | 0x1000060c | 0x10000a7c
          3 | pktdump              | bl rx    _ |   6 |  1536 (  236) | 0x10001d58 | 0x1000226c
          4 | 6lo                  | bl rx    _ |   3 |  1024 (  268) | 0x10002358 | 0x1000264c
          5 | ipv6                 | bl rx    _ |   4 |  1024 (  292) | 0x100015f0 | 0x100018cc
          6 | udp                  | bl rx    _ |   5 |  1024 (  484) | 0x100028e4 | 0x10002bdc
          7 | coap                 | bl mbox  _ |   6 |  1024 (  584) | 0x100011ec | 0x100013a4
          8 | xbee                 | bl rx    _ |   2 |  1024 (  540) | 0x10000c6c | 0x10000f74
            | SUM                  |            |     |  8960 ( 3600)

When I try to send a UDP packet using ‘gnrc_netapi_dispatch_send(GNRC_NETTYPE_UDP, GNRC_NETREG_DEMUX_CTX_ALL, ip)’ the invoked pids are, by this order, 6 (udp) and 5 (ipv6). After this, the packet is not transmitted.

Note: Xbee module is working (it transmits information if called directly by UART).

Thanks in advance,
Tiago Carvalho

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