# System reboot after executing the hciattach command **URL:** \ **Category:** mangOH Yellow\ **Created:** [June 9, 2021, 2:38am UTC](https://mangoh.discourse.group/t/system-reboot-after-executing-the-hciattach-command/9307 "2021-06-09T02:38:25Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![bruceke](https://avatars.discourse-cdn.com/v4/letter/b/0ea827/32.png) [@bruceke](https://mangoh.discourse.group/u/bruceke)\ **Post date:** [June 9, 2021, 2:38am UTC](https://mangoh.discourse.group/t/system-reboot-after-executing-the-hciattach-command/9307/1 "2021-06-09T02:38:25Z")
We try to connect uart1 of WP7607 to WiFi module on mangOH yellow(remove R802 R803 R807 R806 , and wire to UART1 of WP7607) ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/c/ca8924b2721fd3f76d90f8c20ad3a43c91472efb.png) we’re used “hciattach” to configure BT core `hciattach /dev/ttyHS0 bcm43xx 3000000 flow -t 20` But the system reboots itself after executing this command Because there is no any dmesg (I also tried to monitor from the debug console), I have no idea what is going on , does anyone know why it reboot after execute hciattach command? ![image](https://us1.discourse-cdn.com/flex016/uploads/mangoh/original/2X/d/dc2181bbde1500db749ced9c73df7baa395b4694.png) * * * system info: Device: WP7607 IMEI: 359779080309046 IMEISV: E FSN: V3001787360210 Firmware Version: SWI9X07Y\_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14 Bootloader Version: SWI9X07Y\_02.37.03.00 73df45 jenkins 2020/04/08 10:59:14 MCU Version: 002.015 PRI Part Number (PN): 9908663 PRI Revision: 001.002 ---
**Author:** ![bruceke](https://avatars.discourse-cdn.com/v4/letter/b/0ea827/32.png) [@bruceke](https://mangoh.discourse.group/u/bruceke)\ **Post date:** [June 16, 2021, 6:07am UTC](https://mangoh.discourse.group/t/system-reboot-after-executing-the-hciattach-command/9307/2 "2021-06-16T06:07:31Z")
It seems fixed if I change the uart to linux console via ATcommand