Re: things not working - newbie questions

From: Stefan Schmidt <stefan@datenfreihafen.org>
To: Mark Butsch <Mark.Butsch@myfuelmaster.com>,
	"linux-wpan@vger.kernel.org" <linux-wpan@vger.kernel.org>
Subject: Re: things not working - newbie questions
Date: Tue, 30 Mar 2021 09:30:07 +0200	[thread overview]
Message-ID: <a993264a-8bc5-586b-5dac-34d50adfe7b2@datenfreihafen.org> (raw)
In-Reply-To: <SN6PR01MB364865A6E7BF0E559808BD9587649@SN6PR01MB3648.prod.exchangelabs.com>

Hello.

On 23.03.21 22:14, Mark Butsch wrote:
> Hello,
> 
> Sorry if this has all been asked before.
> 
> I am trying to setup a 6lowpan network using a Raspberry Pi 400 and Atmel REB233-XPRO modules (AT86RF233). I have 2 of each.
> 
> I have wired the radio modules to the Raspberry Pi GPIO connector.
> 
> If have created a device tree overlay that I think works when applied because I see this in the dmesg output:
> 
> [   36.388574] at86rf230 spi0.0: Detected at86rf233 chip version 2
> 
> I have installed 'wpan-tools' and 'lowpan-tools'

You will need wpan-tools only. lowpan tools is deprecated for a long 
time now.

> 
> I get what looks like good output when I run:
> 
> $ iwpan dev wpan0 info
> Interface wpan0
>          ifindex 4
>          wpan_dev 0x1
>          extended_addr 0xc62e26eced5de562
>          short_addr 0xffff
>          pan_id 0xffff
>          type node
>          max_frame_retries 3
>          min_be 3
>          max_be 5
>          max_csma_backoffs 4
>          lbt 0
>          ackreq_default 0
> 
> I tried to setup a 6lowpan network (based on things I googled) but pings didn't work, so I am starting over trying to confirm the lower level parts are working first.
> 
> I set the pan_id to 0xabba on both systems.
> 
> I set the short_addr to 0x0001 on one and 0x0002 on the other.
> 
> When I try using wpan-ping (from 0x0001), I get:
> 
> $ wpan-ping -a 0x0002 -c 5
> PING 0x0002 (PAN ID 0xabba) 5 data bytes
> Hit 500 ms packet timeout
> Hit 500 ms packet timeout
> Hit 500 ms packet timeout
> Hit 500 ms packet timeout
> Hit 500 ms packet timeout

Do you actually run wpan-ping in server mode on the other node? Without 
it there would be no reply. Its different from the normal ping utility.

> I used "ip link set wpan0 up" (on both systems) and the result is the same, but I can see packets in wireshark on wpan0.
> 
> A hardware person here suggested using a near field probe to see if we could detect any transmission. We didn't. So I don't know if the radios are actually transmitting.
> 
> Any suggestions on where to go next?

For wpan-ping you need to ahve the server on the other node as stated above.

For your 6lowpan ping6 problem I have not enough description of the 
actual problem to help you.

regards
Stefan Schmidt