Wifi monitor doesnt start if called by anything on startup

[freeman1216]

Expected behavior

If called on startup should execute callback funtion accordingly

Actual behavior

The file gets executed but the callback never called
If called using serial works fine

Test code

init.lua

uart.setup(0,9600,8,uart.PARITY_NONE,uart.STOPBITS_1,1)

tmr.create():alarm(1000,tmr.ALARM_SINGLE,function ()
  dofile("wifi.lua")
end)

wifi.lua

Wifi_table = {}
wifi.monitor.start(13, 0x80,function (pkt)
    if not Wifi_table[pkt.bssid_hex] then
        if  pkt[0] ~= nil then
          Wifi_table[pkt.bssid_hex] = pkt[0]
          uart.write(0,pkt.bssid_hex .. "," .. pkt[0].."\r\n")
        else
          Wifi_table[pkt.bssid_hex]="blank"
          uart.write(0,pkt.bssid_hex .. "," .. "blank".."\r\n")
        end
    end
end
)


local cleartimer = tmr.create()
cleartimer:alarm(4000000, tmr.ALARM_AUTO,function ()
  Wifi_table = {}
end)

NodeMCU startup banner

NodeMCU 3.0.0.0
branch: release
commit: 36cbf9f
release: 3.0.0-release_20211229 +25
release DTS: 202402250804
SSL: false
build 2024-12-07 03:17 powered by Lua 5.1.4 on SDK 3.0.1-dev(fce080e)
build type: float
LFS: 0x0 bytes total capacity
modules: bit,file,gpio,node,ow,tmr,uart,wifi,wifi_monitor

Hardware

ESP8266 Nodemcu v2

[freeman1216]

Found a workaround
You need to set wifi mode to station first
init.lua

uart.setup(0,9600,8,uart.PARITY_NONE,uart.STOPBITS_1,1)

wifi.setmode(wifi.STATION)

tmr.create():alarm(1000,tmr.ALARM_SINGLE,function ()
  dofile("wifi.lua")
end)

Same thing happens if wifi.sta.getap() is called during startup but at least it fails with SOFT_AP mode error, found workaround this way
Guess this means wifi.monitor.start() just fails without an error which is bad

[marcelstoer]

@pjsg What's your take on this? Is documenting that the WiFi mode should be set first good enough?