DIVELK-AN-003: Using WiFi-Bluetooth combo plugin with SBCD
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This application note was validated against specific versions of the kit only. It may not work with other versions. Supported versions are listed in the History section. |
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History[edit | edit source]
| Version | Date | Divelk version | Notes |
|---|---|---|---|
| 4.0.0 | April 2018 March 2019 |
DIVELK 4.0.0 DIVELK 4.0.1 |
Introduction[edit | edit source]
SBC Diva can be populated with DWM WiFi/Bluetooth combo plugin to easily add wireless connectivity. In order to enable the bluetooth, the correct device tree configuration must be passed to the kernel. The sbcd comes with two possible devicetree configurations. The default one enables the UART1 and therefore the bluetooth and wifi module while the other enables the CAN interface and disables the UART1.
Note: In order to enable the DWM module, the correct device tree file must be loaded.
Wifi[edit | edit source]
To enable the wifi, the gpio114 pin must be configured. Once this has been done, the wlan0 interface should become accessible.
The gpio pin can be enabled as follow:
echo 114 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio114/direction echo 1 > /sys/class/gpio/gpio114/value
E.g
root@diva:~# echo 114 > /sys/class/gpio/export root@diva:~# echo out > /sys/class/gpio/gpio114/direction root@diva:~# echo 1 > /sys/class/gpio/gpio114/value root@diva:~# [ 109.511538] omap_hsmmc 481d8000.mmc: card claims to support voltages below defined range [ 109.538676] mmc1: new SDIO card at address 0001 [ 109.565955] PM: Cannot get wkup_m3_ipc handle [ 109.929840] wlcore: loaded [ 110.616596] wlcore: firmware booted (Rev 6.3.10.0.133) [ 110.647936] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Scan and connection test:
root@diva:~# ifconfig wlan0 192.168.11.10
root@diva:~# iw wlan0 scan
BSS ca:d7:19:92:f9:16(on wlan0)
TSF: 12272295971 usec (0d, 03:24:32)
freq: 2412
beacon interval: 100 TUs
capability: ESS Privacy ShortSlotTime (0x0411)
signal: -89.00 dBm
last seen: 3360 ms ago
SSID: guest2
Supported rates: 1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0
DS Parameter set: channel 1
ERP: <no flags>
ERP D4.0: <no flags>
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
Extended supported rates: 6.0 9.0 12.0 48.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS ca:d7:19:92:f9:17(on wlan0)
TSF: 12272293743 usec (0d, 03:24:32)
freq: 2412
beacon interval: 100 TUs
capability: ESS Privacy ShortSlotTime (0x0411)
signal: -89.00 dBm
last seen: 3360 ms ago
SSID: guest3
Supported rates: 1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0
DS Parameter set: channel 1
ERP: <no flags>
ERP D4.0: <no flags>
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
Extended supported rates: 6.0 9.0 12.0 48.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
BSS c8:d7:19:92:f9:15(on wlan0)
TSF: 12272295195 usec (0d, 03:24:32)
freq: 2412
beacon interval: 100 TUs
capability: ESS Privacy ShortSlotTime (0x0411)
signal: -88.00 dBm
last seen: 3360 ms ago
SSID: guest4
Supported rates: 1.0* 2.0* 5.5* 11.0* 18.0 24.0 36.0 54.0
DS Parameter set: channel 1
ERP: <no flags>
ERP D4.0: <no flags>
RSN: * Version: 1
* Group cipher: TKIP
* Pairwise ciphers: TKIP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
Extended supported rates: 6.0 9.0 12.0 48.0
WMM: * Parameter version 1
* u-APSD
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
......
root@diva:~# iw wlan0 connect guest5 root@diva:~# [ 669.489889] wlan0: authenticate with fc:f5:28:cc:03:90 [ 669.507747] wlan0: send auth to fc:f5:28:cc:03:90 (try 1/3) [ 669.523177] wlan0: authenticated [ 669.528427] wlan0: associate with fc:f5:28:cc:03:90 (try 1/3) [ 669.545913] wlan0: RX AssocResp from fc:f5:28:cc:03:90 (capab=0x421 status=0 aid=1) [ 669.571713] wlcore: Association completed. [ 669.582367] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 669.588971] wlan0: associated root@diva:~# ping 192.168.11.243 PING 192.168.11.243 (192.168.11.243): 56 data bytes 64 bytes from 192.168.11.243: seq=0 ttl=64 time=13.544 ms 64 bytes from 192.168.11.243: seq=1 ttl=64 time=2.456 ms 64 bytes from 192.168.11.243: seq=2 ttl=64 time=2.329 ms ^C --- 192.168.11.243 ping statistics --- 3 packets transmitted, 3 packets received, 0% packet loss round-trip min/avg/max = 2.329/6.109/13.544 ms
Performance test[edit | edit source]
The following example shows a throughput performance test, carried out with the well-known iperf tool:
root@diva:~# iperf -c 192.168.11.85 -t 100 -i 5 ------------------------------------------------------------ Client connecting to 192.168.11.153, TCP port 5001 TCP window size: 43.8 KByte (default) ------------------------------------------------------------ [ 3] local 192.168.11.154 port 51484 connected with 192.168.11.85port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 5.0 sec 55.4 MBytes 92.9 Mbits/sec [ 3] 5.0-10.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 10.0-15.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 15.0-20.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 20.0-25.0 sec 56.0 MBytes 94.0 Mbits/sec [ 3] 25.0-30.0 sec 56.2 MBytes 94.4 Mbits/sec [ 3] 30.0-35.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 35.0-40.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 40.0-45.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 45.0-50.0 sec 56.0 MBytes 94.0 Mbits/sec [ 3] 50.0-55.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 55.0-60.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 60.0-65.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 65.0-70.0 sec 56.0 MBytes 94.0 Mbits/sec [ 3] 70.0-75.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 75.0-80.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 80.0-85.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 85.0-90.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 90.0-95.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 95.0-100.0 sec 56.1 MBytes 94.2 Mbits/sec [ 3] 0.0-100.0 sec 1.10 GBytes 94.1 Mbits/sec
Bluetooth[edit | edit source]
The bluetooth can also be configured by enabling the correct gpios:
echo 114 > /sys/class/gpio/export echo 115 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio114/direction echo out > /sys/class/gpio/gpio115/direction echo 1 > /sys/class/gpio/gpio114/value echo 1 > /sys/class/gpio/gpio115/value
E.g
root@diva:~# echo 114 > /sys/class/gpio/export
root@diva:~# echo out > /sys/class/gpio/gpio114/direction
root@diva:~# echo 1 > /sys/class/gpio/gpio114/value
root@diva:~# echo 115 > /sys/class/gpio/export
root@diva:~# echo out > /sys/class/gpio/gpio115/direction
root@diva:~# echo 1 > /sys/class/gpio/gpio115/value
root@diva:~# rfkill list
0: phy0: wlan
Soft blocked: no
Hard blocked: no
Attaching the device:
root@diva:~# hciattach /dev/ttyS1 texas 30000000 flow Found a Texas Instruments' chip! Firmware file : /lib/firmware/ti-connectivity/TIInit_7.6.15.bts Loaded BTS script version 1 texas: changing baud rate to 3000000, flow control to 1 Device setup complete
Once the device has been attached using hciattach the hci0 interface should become visible:
root@diva:~# rfkill list
0: phy0: wlan
Soft blocked: no
Hard blocked: no
1: hci0: bluetooth
Soft blocked: no
Hard blocked: no
Bluetooth scan example:
root@diva:~# hciconfig hci0 up
root@diva:~# hcitool scan
Scanning ...
18:F0:E4:E1:DC:F8 Redmi
C8:94:BB:A0:7C:1F wifi mp
The devices have been successfully recognized.
