# Can't send AT command to the WP7609 module via UART1 **URL:** \ **Category:** WP Series\ **Created:** [March 9, 2021, 9:54am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062 "2021-03-09T09:54:04Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![huydai2004](https://avatars.discourse-cdn.com/v4/letter/h/ebca7d/32.png) [@huydai2004](https://forum.sierrawireless.com/u/huydai2004)\ **Post date:** [March 9, 2021, 9:54am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/1 "2021-03-09T09:54:04Z")
Hi everyone. Now, I’m trying to send AT command from the PC to the WP7609 module over UART1. But I am not received any response data. I use the module USB\_To\_TTL (FT232). I checked and have had 1.8V on the VGPIO pin. Does everybody know? and how to fix it? Kind regards! ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [March 9, 2021, 10:09am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/2 "2021-03-09T10:09:52Z")
I don’t see problem, you can see below: > [@FX30S Factory Reset](https://forum.sierrawireless.com/t/fx30s-factory-reset/22253/21): > > I typing ‘at+ipr?’ and ‘at+ipr=?’ using USB AT port and serial port. Always I have the same return ‘OK’ I have just to see what is the serial port rate!!! and after that I have to change serial port rate to 9600 (default rate is 115200) do you understand what I need? Have you set AT!MAPUART? ---
**Author:** ![huydai2004](https://avatars.discourse-cdn.com/v4/letter/h/ebca7d/32.png) [@huydai2004](https://forum.sierrawireless.com/u/huydai2004)\ **Post date:** [March 9, 2021, 10:32am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/3 "2021-03-09T10:32:03Z")
thanks, @jyijyi. Now, I am using UART1 AT port instead of the USB AT port. Because our PCB has not a USB port. that is our shortcoming. after set AT!MAPUART. can you use the UART1 AT port? regards! ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [March 9, 2021, 12:15pm UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/4 "2021-03-09T12:15:12Z")
Yes, as said in the link above, i can use it ---
**Author:** ![huydai2004](https://avatars.discourse-cdn.com/v4/letter/h/ebca7d/32.png) [@huydai2004](https://forum.sierrawireless.com/u/huydai2004)\ **Post date:** [March 10, 2021, 1:47am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/5 "2021-03-10T01:47:46Z")
@jyijyi thanks for your support! I will try again as soon as possible. ---
**Author:** ![huydai2004](https://avatars.discourse-cdn.com/v4/letter/h/ebca7d/32.png) [@huydai2004](https://forum.sierrawireless.com/u/huydai2004)\ **Post date:** [April 2, 2021, 2:37am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/6 "2021-04-02T02:37:26Z")
Hi @jyijyi Now. I’m trying to interface to the WP7609 module over An USB Port. But I cannot access your website ([https://source.sierrawireless.com/](https://source.sierrawireless.com/)) to download driver USB win 10 to setup up on my PC. Can you send me this driver? My email is “[hohuydai@ginno.com](mailto:hohuydai@ginno.com)” and I’m working in the G-Innovation corporation. many thanks! ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [April 2, 2021, 4:50am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/7 "2021-04-02T04:50:36Z")
I don’t have driver either ---
**Author:** ![huydai2004](https://avatars.discourse-cdn.com/v4/letter/h/ebca7d/32.png) [@huydai2004](https://forum.sierrawireless.com/u/huydai2004)\ **Post date:** [April 2, 2021, 5:03am UTC](https://forum.sierrawireless.com/t/cant-send-at-command-to-the-wp7609-module-via-uart1/23062/8 "2021-04-02T05:03:41Z")
OK. thanks for your reply @jyijyi