hciconfig seems to be part of bluez…gary says me that bluez currently does not work stable…how to scan without bluez?
have not done much with bluetooth 
since ifconfig is not part of debian stretch we can use “ip addr show ap0” instead of ifconfig
also you should not call echo 0 > /dev/wmtWifi
here my full log:
root@bpi-r2:~# ./wifi.sh
init combo devic[ 29.515869] [WMT-DETECT][I]wmt_detect_open:open major 154 minor 0 (pid 540)
e
[ 29.524123] [WMT-DETECT][I]wmt_detect_unlocked_ioctl:cmd (-2147191037),arg(0)
Opened combo dev[ 29.532287] [WMT-DETECT][I]wmt_detect_unlocked_ioctl:cmd (1074034433),arg(30243)
ice
get device[ 29.540313] set current consys chipid (0x7623)
id : 30243
[ 29.546139] [WMT-DETECT][I]wmt_detect_unlocked_ioctl:cmd (-2147191036),arg(30243)
set device id : [ 29.554760] [WMT-MOD-INIT][I]do_common_drv_init:start to do common driver init, chipid:0x00007623
30243
[ 29.568860] [WMT-CONF][E]wmt_conf_parse_pair(323):unknown field 'mt6620.defAnt'.
[ 29.576286] [WMT-CONF][W]wmt_conf_parse:parse fail (mt6620.defAnt, mt6620_ant_m3.cfg, -1)
[ 29.584413] [WMT-CONF][E]wmt_conf_parse_pair(323):unknown field 'mt6628.defAnt'.
[ 29.591790] [WMT-CONF][W]wmt_conf_parse:parse fail (mt6628.defAnt, mt6628_ant_m1.cfg, -1)
[ 29.599950] [WMT-CONF][E]wmt_conf_parse_pair(323):unknown field 'mt6630.defAnt'.
[ 29.607318] [WMT-CONF][W]wmt_conf_parse:parse fail (mt6630.defAnt, mt6630_ant_m1.cfg, -1)
[ 29.617880] [WMT-CONSYS-HW][E]mtk_wmt_probe(122):Wmt Cannot find pinctrl default!
[ 29.626396] [WMT-MOD-INIT][I]do_common_drv_init:finish common driver init
[ 29.633153] [BT-MOD-INIT][I]do_bluetooth_drv_init:CONFIG_MTK_COMBO_BT is not defined
[ 29.640909] [WCN-MOD-INIT][E]do_connectivity_driver_init(57):do common driver init failed, ret:-1
[ 29.649748] [GPS-MOD-INIT][I]do_gps_drv_init:CONFIG_MTK_COMBO_GPS is not defined
[ 29.657118] [WCN-MOD-INIT][E]do_connectivity_driver_init(62):do common driver init failed, ret:-1
[ 29.665956] [FM-MOD-INIT][I]do_fm_drv_init:start to do fm module init
[ 29.672351] [FM-MOD-INIT][I]do_fm_drv_init:finish fm module init
[ 29.678346] [WLAN-MOD-INIT][I]do_wlan_drv_init:start to do wlan module init 0x7623
[ 29.686165] [MTK-WIFI] WIFI_init: mtk_wmt_WIFI_chrdev driver(major 153) installed.
[ 29.693708] [WLAN-MOD-INIT][I]do_wlan_drv_init:WMT-WIFI char dev init, ret:0
[ 29.701695] [WLAN-MOD-INIT][I]do_wlan_drv_init:WLAN-GEN2 driver init, ret:0
[ 29.708705] [WLAN-MOD-INIT][I]do_wlan_drv_init:finish wlan module init
do module init: [ 29.715566] [WMT-DETECT][I]wmt_detect_close:close major 154 minor 0 (pid 540)
30243
failed to init module
open device node[ 32.735688] [WMT-DEV][W]WMT_unlocked_ioctl:chipid = 0x7623
succeed.(Node:/[ 32.742656] [WMT-LIB][W]wmt_lib_set_hif:new hifType: 2, fm:2
dev/stpwmt, fd:3[ 32.749531] [WMT-CORE][E]opfunc_hif_conf(874):WMT-CORE: WMT HIF info added
)
chip id is 0[ 32.749533] [WMT-DEV][W]WMT_unlocked_ioctl:unknown cmd (-2147180516)
x7623
chiId:0x7[ 32.765358] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 234
623, setting to [ 32.772116] vcn18: mode operation not allowed
property((null))[ 32.777775] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 238
chiId:0x7623
[ 32.784474] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 241
run SOC chip flo[ 32.791223] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 243
w
create pwr on[ 32.798448] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 250
thread ok
[ 32.804962] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 277
[ 32.811651] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 279
[ 32.817034] DEBUG: Passed mtk_wcn_consys_power_on 193
[ 32.822167] DEBUG: Passed mtk_wcn_consys_power_on 195
[ 32.827342] DEBUG: Passed mtk_wcn_consys_power_on 202
[ 32.832445] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 281
[ 32.837841] DEBUG: Passed mtk_wcn_consys_hw_reg_ctrl 286
[ 32.896231] [WMT-CONF][E]wmt_conf_parse_pair(323):unknown field 'mt6620.defAnt'.
[ 32.903590] [WMT-CONF][W]wmt_conf_parse:parse fail (mt6620.defAnt, mt6620_ant_m3.cfg, -1)
[ 32.911760] [WMT-CONF][E]wmt_conf_parse_pair(323):unknown field 'mt6628.defAnt'.
[ 32.919145] [WMT-CONF][W]wmt_conf_parse:parse fail (mt6628.defAnt, mt6628_ant_m1.cfg, -1)
[ 32.927294] [WMT-CONF][E]wmt_conf_parse_pair(323):unknown field 'mt6630.defAnt'.
[ 32.934648] [WMT-CONF][W]wmt_conf_parse:parse fail (mt6630.defAnt, mt6630_ant_m1.cfg, -1)
[ 32.944733] [WMT-IC][W]mtk_wcn_soc_ver_check:0x7623: read hw_ver (hw version) (0x8a00)
[ 32.953227] [WMT-IC][W]mtk_wcn_soc_ver_check:0x7623: read fw_ver (rom version) (0x8a00)
[ 32.961221] [WMT-IC][W]mtk_wcn_soc_ver_check:0x7623: ic info: SOC_CONSYS.E1 (0x8a00/0x8a00, WMTHWVER:0, patch_ext:_e1)
enter power on connsys flowpatch name pre-fix:ROMv2_lm_patch
fwVersion:0x8a00
/etc/firmware/ROMv2_lm_patch_1_0_hdr.bin
fw Ver in patch: 0x8a00
read patch info:0x22,0x00,0x06,0x00
gpatchnum = [2]
gdwonseq = [2]
/etc/firmware/ROMv2_lm_patch_1_1_hdr.bin
fw Ver in patch: 0x8a00
read patch info:0x21,0x00,0x0e,0xf0
gdwonseq = [1]
cmd(srh_patch) resp(ok)
[ 33.072502] [WMT-IC][W]mtk_wcn_soc_patch_dwn:wmt_core: patch dwn:0 frag(51, 268) ok
[ 33.222661] [WMT-IC][W]mtk_wcn_soc_patch_dwn:wmt_core: patch dwn:0 frag(114, 52) ok
[ 33.558518] [WMT-IC][W]mtk_wcn_soc_sw_init:co-clock disabled.
[ 33.565015] [STP] mtk_wcn_stp_psm_enable:[W] STP Not Ready, Dont do Sleep/Wakeup
[ 33.572403] [WMT-CORE][W]wmt_core_dump_func_state:[AF FUNC ON]status(b:0 f:0 g:0 w:0 lpbk:2 coredump:0 wmt:2 stp:0)
[ 33.582859] [WMT-EXP][W]mtk_wcn_wmt_func_ctrl:OPID(3) type(9) ok
[ 37.734904] [MTK-WIFI] WIFI_open: WIFI_open: major 153 minor 0 (pid 539)
[ 37.741755] [MTK-WIFI] WIFI_write: WIFI_write A
[ 37.741755]
[ 37.786920] [WMT-FUNC][W]wmt_func_wifi_on:WMT-FUNC: wmt wlan func on before wlan probe
[ 37.798410] kalFirmwareImageMapping firmware size 225840
[ 38.869759] [MTK-WIFI] register_set_p2p_mode_handler: (pid 545) register set p2p mode handler c050ebd0
[ 38.879095] [WMT-FUNC][W]wmt_func_wifi_on:WMT-FUNC: wmt call wlan probe ok
[ 38.885936] [WMT-CORE][W]wmt_core_dump_func_state:[AF FUNC ON]status(b:0 f:0 g:0 w:2 lpbk:2 coredump:0 wmt:2 stp:0)
[ 38.896494] [WMT-EXP][W]mtk_wcn_wmt_func_ctrl:OPID(3) type(3) ok
[ 38.902588] [MTK-WIFI] WIFI_write: WMT turn on WIFI success!
[ 38.909882] [MTK-WIFI] WIFI_write: Set wlan mode 0 --> 1
[ 38.915656] [MTK-WIFI] WIFI_close: WIFI_close: major 153 minor 0 (pid 539)
12: ap0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 02:08:22:d8:03:fc brd ff:ff:ff:ff:ff:ff
Done, all good, ready to lauch hostapd
root@bpi-r2:~# hciconfig -a
root@bpi-r2:~#
as you see hciconfig -a does not show any controller (must see my local BT-controller)