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I would like to connect one Raspberry PI to a Wifi network using DPP (Wifi Easy Connect) by another Raspberry PI that is already connected to this network. Further resources I used where

Extented example file and explanation of hostapd.conf/wpa_supplicant.conf
https://github.com/Comcast/EasyConnect/tree/master/raspberrypi
https://github.com/michael-dev/hostapd/blob/master/wpa_supplicant/README-DPP

Both PIs are version 5 with Linux raspberrypi 6.6.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.20-1+rpt1 (2024-03-07) aarch64 GNU/Linux obtained from uname -a.

One PI is already connected to my Wifi at home and should be the Configurator in this setup. The second PI, the Enrollee is not yet connected to the network and should be provisioned by the Configurator.

The wpa_supplicant.conf of the Enrollee:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=DE
pmf=2
dpp_config_processing=2

The wpa_supplicant.conf of the Configurator:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=DE

network={
    ssid="MY_NETWORK_AT_HOME"
    psk="MY_PASSWORD"
    key_mgmt=WPA-PSK
}

Both wpa_supplicant.conf are used by the respective wpa_supplicant process.
DPP related commands are executed inside wpa_cli (Interactive mode) for the correct interface wlan0 on both PIs.

On the Enrollee:

dpp_bootstrap_gen type=qrcode mac=2ccf67158817 chan=81/1

where the mac address is obtained from the interface wlan0 using ifconfig and the channel is the first channel of 2412 MHz in a 2.4 GHz Wifi.
It returns a bootstrap_id (1 in my case).

dpp_bootstrap_get_uri 1

with 1 being the bootstrap_id. It returns the dpp_uri (DPP:C:81/1;M:2ccf67158817;V:2;K:MDkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDIgACH/bVKOIqu6MdvjapELv4z/wiR72RLKVLzznKbEymx3c=;; in my case).

dpp_listen 2412

On the Configurator:

dpp_configurator add

which returns the id (1 in my case) of the configurator.

dpp_configurator_get_key 1

which returns the key (30770201010420738b13e343a23e64883ee43bf5d27b3f4abe6134882bc07f085b03b2cc2a58aea00a06082a8648ce3d030107a144034200049d303d3d39734a7b274284c70b2f9d08e8e23df1013a12a9185c43e6c9f68d74b99d9d9a69efcecd848b6577c142279fa9aa09a7eca30bd8067be97bc32ffd11> in my case) of the configurator.

dpp_qr_code DPP:C:81/1;M:2ccf67158817;V:2;K:MDkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDIgACH/bVKOIqu6MdvjapELv4z/wiR72RLKVLzznKbEymx3c=;;

returns the bootstrap_id again (1 in my case which is the same as it was encoded on Enrollee side).

dpp_auth_init peer=1 conf=sta-dpp configurator=1 ssid=<HEXDUMP_OF_SSID>

where peer is the bootstrap_id of the Enrollee and configurator is the id of the Configurator. Since want to provision a Wifi client and not an AP the conf parameter needs to be set to sta-dpp.

I get the following console output of this command on the Configurator side:

<3>DPP-TX dst=2c:cf:67:15:88:17 freq=2412 type=0
<3>DPP-TX-STATUS dst=2c:cf:67:15:88:17 freq=2412 result=no-ACK
<3>DPP-TX dst=2c:cf:67:15:88:17 freq=2412 type=0
<3>DPP-TX-STATUS dst=2c:cf:67:15:88:17 freq=2412 result=no-ACK
<3>DPP-TX dst=2c:cf:67:15:88:17 freq=2412 type=0
<3>DPP-TX-STATUS dst=2c:cf:67:15:88:17 freq=2412 result=no-ACK
<3>DPP-TX dst=2c:cf:67:15:88:17 freq=2412 type=0
<3>DPP-TX-STATUS dst=2c:cf:67:15:88:17 freq=2412 result=no-ACK
<3>DPP-TX dst=2c:cf:67:15:88:17 freq=2412 type=0
<3>DPP-TX-STATUS dst=2c:cf:67:15:88:17 freq=2412 result=no-ACK
<3>DPP-AUTH-INIT-FAILED

The Enrollee side does not show anything in the terminal and the system logs obtained with journalctl -r -g DPP show that there is nothing happening when listening to the channel.

Jun 03 12:46:57 raspberrypi wpa_supplicant[716]: wlan0: Control interface command 'DPP_BOOTSTRAP_GEN type=qrcode mac=2ccf67158817 chan=81/1'
Jun 03 12:46:57 raspberrypi wpa_supplicant[716]: DPP: Generating a keypair
Jun 03 12:46:57 raspberrypi wpa_supplicant[716]: DPP: Compressed public key (DER) - hexdump(len=59): 30 39 30 13 06 07 2a 86 48 ce 3d 02 01 06 08 2a 86 48 ce 3d 03 01 07 03 22 00 03 ae 19 35 da e3 2f cf 0f 4d 85 d4 46 c4 f6 d4 be 4d d8 12 a2 f1 31 f7 c3 49 72 fa 81 f1 b3 92 05
Jun 03 12:46:57 raspberrypi wpa_supplicant[716]: DPP: Public key hash - hexdump(len=32): d7 e7 e5 41 8b 5b 9e 09 02 20 b9 3f cb 6d 0f bb f4 b0 03 eb 84 0b 1c ab 32 1d 7e fb 70 5a da 36
Jun 03 12:46:57 raspberrypi wpa_supplicant[716]: DPP: Public key hash (chirp) - hexdump(len=32): 30 40 cf 36 6d 12 cb 51 a5 99 fa e2 24 fb 1d b4 51 2f be 7b 64 9b b8 2d 2c 61 f0 59 c9 48 a0 ef
Jun 03 12:46:57 raspberrypi wpa_supplicant[716]: DPP: URI channel-list: opclass=81 channel=1 ==> freq=2412
Jun 03 12:46:57 raspberrypi wpa_supplicant[716]: DPP: URI mac: 2c:cf:67:15:88:17
Jun 03 12:47:05 raspberrypi wpa_supplicant[716]: wlan0: Control interface command 'DPP_BOOTSTRAP_GET_URI 1'
Jun 03 12:49:40 raspberrypi wpa_supplicant[716]: wlan0: Control interface command 'DPP_LISTEN 2412'
Jun 03 12:49:40 raspberrypi wpa_supplicant[716]: DPP: Remain-on-channel started for listen on 2412 MHz for 5000 ms

It looks like the dpp_auth_init command does not reach the Enrollee. Does anyone know what is wrong here?

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Danh mục

Setup Device Provisioning Protocol (DPP), also known as Wifi Easy Connect, with two Raspberry PIs