# Wifi exp board on legato21 (R15) **URL:** \ **Category:** Uncategorized\ **Created:** [November 14, 2022, 8:44am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333 "2022-11-14T08:44:33Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 14, 2022, 8:44am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/1 "2022-11-14T08:44:33Z")
we are following a topic for running the wifi talon exp board on a FX30 (wp77xx) R15 (legato21) and are having issues with the configuration. This is the log from the device, where it seems there is an error with the i2c communication: Nov 14 16:23:04 fx30 user.debug Legato: DBUG | wifiService[1437]/daemon T=main | pa\_wifi\_ap.c GenerateHostapdConf() 401 | LE\_WIFIAP\_SECURITY\_WPA2 Nov 14 16:23:04 fx30 user.info Legato: INFO | wifiService[1437] | WIFI\_START Nov 14 16:23:05 fx30 user.debug Legato: DBUG | wifiService[1437]/daemon T=main | pa\_wifi\_ap.c pa\_wifiAp\_Start() 665 | WiFi hardware started correctly Nov 14 16:23:05 fx30 user.debug Legato: DBUG | wifiService[1437]/framework T=main | thread.c SetSchedPolicyAttr() 682 | Set scheduling policy to SCHED\_OTHER for thread ‘WifiApPaThread’. Nov 14 16:23:05 fx30 user.debug Legato: DBUG | wifiService[1437]/framework T=WifiApPaThread | thread.c PThreadStartRoutine() 478 | Set nice level to 0. Nov 14 16:23:05 fx30 user.info Legato: INFO | wifiService[1437]/daemon T=WifiApPaThread | pa\_wifi\_ap.c WifiApPaThreadMain() 278 | Wifi event report thread started! Nov 14 16:23:05 fx30 user.info Legato: INFO | wifiService[1437] | WIFIAP\_HOSTAPD\_START Nov 14 16:23:05 fx30 user.info Legato: INFO | wifiService[1437]/daemon T=WifiApPaThread | pa\_wifi\_ap.c WifiApPaThreadMain() 295 | PARSING:WIFI\_SET\_EVENT : len:15 Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | /legato/systems/current/apps/wifiService/read-only/pa\_wifi: Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | line 427: Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | /bin/hostapd: not found Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | Nov 14 16:23:05 fx30 user.info Legato: INFO | wifiService[1437]/daemon T=WifiApPaThread | pa\_wifi\_ap.c WifiApPaThreadMain() 295 | PARSING: (phy #0): unknown event 8 (del\_interface) : len:43 Nov 14 16:23:05 fx30 user.info Legato: INFO | wifiService[1437]/daemon T=WifiApPaThread | pa\_wifi\_ap.c WifiApPaThreadMain() 295 | PARSING:phy #0: delete wiphy : len:21 Nov 14 16:23:05 fx30 user.info Legato: INFO | wifiService[1437] | mangOH red board Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | sh: write error: Operation not permitted Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* failed to read i2c data Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* I2c get addr 0x3e value failure Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* Set mode 0 failure Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* failed to read i2c data Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* I2c get addr 0x3e value failure Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* Set polarity 0 failure Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* failed to read i2c data Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* I2c get addr 0x3e value failure Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | ERR\* Set output 1 failure Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437]/daemon T=main | pa\_wifi\_ap.c pa\_wifiAp\_Start() 696 | WiFi Client Command “WIFIAP\_HOSTAPD\_START” Failed: (32512) But on the hardware we have setup the UART to be assigned to the LINUX and then activated the GPIO8: AT!MAPUART=17,2 AT+WIOCFG=8,16,1,0 The only extra thing we have noticed is that some of the module are missing now and we are not sure if this board should be run in a different way. Any help will be very much appreciated!!! ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 14, 2022, 9:08am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/2 "2022-11-14T09:08:51Z")
does it work on R14? Some user says it should be working on R14: > **[Missing drivers on FX30 R15 (built from linux source)](https://forum.sierrawireless.com/t/missing-drivers-on-fx30-r15-built-from-linux-source/27342)** > > we are updating from R14 to R15 (legato 21) and have an issue with missing drivers for the init script (see attached) for the Talon wifi IoT exp board. R14 will work: 1)Installing the stock firmware (R14.1.1.002 Firmware for Sierra ) 2) run the... ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 14, 2022, 10:27am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/3 "2022-11-14T10:27:41Z")
Yes, we just tested with r14 and it seems working, no luck with the r15 i was wondering if anyone has a clue about this issue? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 14, 2022, 10:54am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/4 "2022-11-14T10:54:16Z")
Can you chech this and see if it appears in r14 but not in r15? `Nov 14 16:23:05 fx30 user.err Legato: =ERR= | wifiService[1437] | /bin/hostapd: not found` ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 18, 2022, 8:17am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/5 "2022-11-18T08:17:59Z")
how do you check to what is mapped UART2? AT!MAPUART? will give the mapping of UART1…? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 18, 2022, 8:19am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/6 "2022-11-18T08:19:46Z")
You can see this: ![image](https://us1.discourse-cdn.com/flex019/uploads/legato1/original/2X/2/2babd1f6a5282716a48e6dcf3edd5e53a45846aa.png) ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 20, 2022, 11:15pm UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/7 "2022-11-20T23:15:40Z")
Yup, so it seems that the second interface is mapped to the linux: AT!MAPUART? !MAPUART: 1,17 The new pa\_wifi script should run the tiwifi setup script part below: ti\_wifi\_start() { lsmod | grep wlcore \>/dev/null if [$? -ne 0]; then ``` # This is only required for WP85, because kernel is different. if ["${KVERSION}" = "314"] ; then # Check if MMC/SDIO module is inserted. Because WIFI use SDIO/MMC bus # we need to remove the SDIO/MMC module lsmod | grep msm_sdcc >/dev/null if [$? -eq 0]; then grep -q mmcblk /proc/mounts if [$? -ne 0]; then rmmod msm_sdcc else false fi if [$? -ne 0]; then # Unable to remove. May be others devices use SDIO/MMC bus echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" echo "Unable to remove the SDIO/MMC module... May be in use ?" echo "Please, free all SDIO/MMC devices before using TI WIFI." echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" exit 127 fi fi fi # Enable all GPIOs on all EXPANDERs gpioexp 1 1 enable >/dev/null || exit 127 ### mangOH green has 3 expanders # Set IOTO_RESET, GPIO#4/EXPANDER#3 - IOT0 Reset signal is disabled gpioexp 3 4 output normal high >/dev/null 2>&1 if [$? -ne 0]; then echo "mangOH red board" # Set IOT0_GPIO2 = 1 (WP GPIO13) [-d ${GPIO_DIR}13] || echo 13 >${GPIO_EXPORT} echo out >${GPIO_DIR}13/direction echo 1 >${GPIO_DIR}13/value # Set IOT0_RESET = 1 (WP GPIO2) [-d ${GPIO_DIR}2] || echo 2 >${GPIO_EXPORT} echo out >${GPIO_DIR}2/direction echo 1 >${GPIO_DIR}2/value # Clear SDIO_SEL, GPIO#9/EXPANDER#1 - Select the SDIO gpioexp 1 9 output normal low >/dev/null || exit 127 else echo "mangOH green board" # Set IOT0_GPIO2 = 1 (WP GPIO33) [-d ${GPIO_DIR}33] || echo 33 >${GPIO_EXPORT} echo out >${GPIO_DIR}33/direction echo 1 >${GPIO_DIR}33/value # Clear SDIO_SEL, GPIO#13/EXPANDER#1 - Select the SDIO gpioexp 1 13 output normal low >/dev/null || exit 127 fi # Kernel 3.14 only. if ["${KVERSION}" = "314"] ; then modprobe msm_sdcc || exit 127 fi modprobe wlcore || exit 127 modprobe wlcore_sdio || exit 127 modprobe wl18xx || exit 127 fi attempt=6 for i in $(seq 1 ${attempt}) do if [$i -ne 1]; then sleep 1 fi (ifconfig -a | grep wlan0 > /dev/null) && break done if [$? -ne 0]; then echo "Failed to start TI wifi, interface does not exist." exit ${TI_WIFI_PA_NO_IF_ERR} fi ifconfig wlan0 up > /dev/null if [$? -ne 0] ; then echo "Failed to start TI wifi, interface can not be brought up." exit ${TI_WIFI_PA_NO_IF_UP_ERR} fi ``` } but even when I try to run the command manually it seems that the error with the i2c communication still persist… wifiService[1438] | WIFI\_START wifiService[1438] | ERR\* failed to write i2c data _wifiService[1438] | FTL Failed to enable PCA9548A I2C switch_\* **wifiService[1438] | Clean up due to unknown error** ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 20, 2022, 11:21pm UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/8 "2022-11-20T23:21:16Z")
As it fails for i2c communication, while on the previous legato version it seemed this was using the UART2 communication, I am wondering if we have to change the way the communication with the IoT exp board works? Understand this is not something fully supported by SWI, possibly someone experienced with the talon IoT wifi could reply? We are looking at implementing this on several devices and would like to have an understanding of why this is no longer working with the new legato version… ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 21, 2022, 1:11am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/9 "2022-11-21T01:11:56Z")
it failed on “gpioexp 1 1 enable”, seems not UART2 issue. ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 21, 2022, 2:35am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/10 "2022-11-21T02:35:20Z")
how can you say it fails in that command? we assume it should not cause an i2c communication error if it is only trying to enable the gpioexp…? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 21, 2022, 2:43am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/11 "2022-11-21T02:43:17Z")
what did you see in console if you type that command? ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 21, 2022, 8:32am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/12 "2022-11-21T08:32:04Z")
thank you for that, you were correct, this is what happens: root@fx30:~# gpioexp 1 1 enable expander#:1 gpio pin:1, i2cAddr:0x3e module 1, pin 1 i2cAddr 62 bus 4 bank 1 Open I2C Bus at, ‘/dev/i2c/4’ Try open I2C Bus at, ‘/dev/i2c-4’ Enabling PCA9548A I2C switch… Open I2C Bus at, ‘/dev/i2c/4’ Try open I2C Bus at, ‘/dev/i2c-4’ ERR\* failed to write i2c data FTL\* Failed to enable PCA9548A I2C switch What is the meaning of this? We didn`t have this problem with the previous version of legato (19). ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 21, 2022, 8:46am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/13 "2022-11-21T08:46:04Z")
i think this is not related to legato, but i guess there is change of yocto imge in R15 which makes this problem I wonder if you can modify the tiwifi so that it will skip this line ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 21, 2022, 8:54am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/14 "2022-11-21T08:54:46Z")
I can try to, do you have any reference and documentation about this gpioexp command? We can try to rebuild from linux source to see if this solves the problem… ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 21, 2022, 8:59am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/15 "2022-11-21T08:59:40Z")
I am not sure if FX30 is really using this gpio expander in hardware… this gpioexp seems is for mangoh board. Anyway, source code of gpioexp is in here: ./build\_bin/tmp/work/armv7a-neon-poky-linux-gnueabi/sierra-init-tiwifi/1.0-r0/gpioexp.c I suggest you modify tiwifi to see if it works first ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 21, 2022, 9:18am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/16 "2022-11-21T09:18:46Z")
yup, it actually worked. Will have a look to see if this can be handled from the legato part itself but I think we will need to re-build the linux image to solve the problem… ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 21, 2022, 9:32am UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/17 "2022-11-21T09:32:17Z")
how is your modification now in tiwifi to make it work in R15? Just comment out this line? ` gpioexp 1 1 enable >/dev/null || exit 127` Why do you need to modify legato image? Didn’t you only need to modify tiwifi? ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 22, 2022, 2:02pm UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/18 "2022-11-22T14:02:57Z")
in order to get it up an running on a new device I need to modify the linux image. but have tested a bit more this and it actually doesn’t work… even when we comment the exit error, it will get stuck on deploying the kernel modules. It would be nice to hear from anyone using the same IoT exp board as I guess this will be the same issue for everybody, or anyone can advise any alternative IoT wifi board? we don`t really care and the talon one seems completely without any sort of support ---
**Author:** ![ccu](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@ccu](https://forum.legato.io/u/ccu)\ **Post date:** [November 22, 2022, 2:10pm UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/19 "2022-11-22T14:10:03Z")
it gets stuck on the call modprobe wlcore\_sdio || exit 127 it doesn’t return error or anything but it doesn’t proceed either… ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [November 22, 2022, 2:51pm UTC](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333/20 "2022-11-22T14:51:33Z")
For FX30 (WP7702 inside), I remember i need to do the following first in R14: ```auto cat /proc/kmsg & modprobe wlcore_sdio.ko modprobe wlcore.ko modprobe wl18xx.ko echo 33 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio33/direction echo 1 > /sys/class/gpio/gpio33/value echo 8 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio8/direction echo 1 > /sys/class/gpio/gpio8/value wifi client start ``` [Next page](https://forum.legato.io/t/wifi-exp-board-on-legato21-r15/6333.md?page=2)