I am new to lua and nodemcu. I have a script that runs in the following way:
1) Search for two configuration file in flash, if both are present, then configure the wifi AP in station mode(wifi configuration is stored in file). Then create a one shot alarm to trigger callback after 20 sec to check whether we got an IP.
2) If IP is received before the callback, then, unregister the previous timer and perform an HTTP post and also create another timer which triggers after another 20 sec to check whether http callback was executed.
3) If http callback runs first then it unregisters the previous timer.
4) After all these checks just start a timer that runs a script "pollslave.lua" every 10 ms to poll the HSPI bus.
I tried to make it pretty sure that at a time only one timer is running.
I am testing now by keeping the server(in dev. PC) offline so that HTTP callback is not executed and the timer callback executes first.
It starts polling the slave but after about 10sec nodemcu reboots. Folowing is my "init_test.lua"
local fileutil=require("fileutility")
local wifiutil=require("wifiutility")
local httputil=require("httputility")
local dvconf="dvconf.cnf"
local wificonf="wificonf.cnf"
local post_method="TestSrv"
msg=""
wifi.eventmon.register(wifi.eventmon.STA_GOT_IP,
function(T)
print("IP Received")
if wifitout then
wifitout:unregister()
print("WiFi Timout Monitor was Running...hence stopped")
wifitout=nil
end
local dconf=fileutil.loadDeviceConfigs(dvconf)
local srv_url=dconf.server
local auth_id=dconf.auth_id
local pwd=dconf.pwd
local len=string.len(srv_url)
if string.sub(srv_url,len,len)~="/" then
srv_url=srv_url.."/"
end
httpTimeoutMon()
httputil.getServerLogin(srv_url..post_method,
auth_id,pwd,function() startPollSlave() end)
end)
spi.setup(1,spi.MASTER,spi.CPOL_HIGH,spi.CPHA_LOW,8,80,spi.FULLDUPLEX)
wifi.setphymode(wifi.PHYMODE_N)
function startPollSlave()
pollslavetimer=tmr.create()
pollslavetimer:alarm(10,tmr.ALARM_AUTO,function() dofile("pollslave.lua") end)
end
function httpTimeoutMon()
srvtout=tmr.create()
print("Starting Server Timeout Monitor..")
srvtout:alarm(20000,tmr.ALARM_SINGLE,function()
print("http server Timeout Occured...")
if pollslavetimer then
local s,m=pollslavetimer:state()
if s==false then
msg="Server is offline.."
pollslavetimer:start()
print("Pollslave was created but not running..hence started..")
end
else
print("Pollslave was not created...hence started...")
msg="Server is offline.."
startPollSlave()
end
end)
print("Started Server Timeout Monitor...")
end
function wifiTimeoutMon()
wifitout=tmr.create()
print("Starting WiFi Timeout Monitor")
wifitout:alarm(20000,tmr.ALARM_SINGLE,function()
print("20 sec Timeout Occured..")
if pollslavetimer then
local s,m=pollslavetimer:state()
if s==false then
wifi.sta.clearconfig()
msg="No Internet Access.."
pollslavetimer:start()
end
else
wifi.sta.clearconfig()
msg="No Internet Access.."
startPollSlave()
end
end)
print("WiFi Timeout Monitor Started..")
end
if file.exists(dvconf) then
print("Device Settings File found...")
local dconf=fileutil.loadDeviceConfigs(dvconf)
if file.exists(wificonf) then
print("WiFi Configurations found...")
wifi.sta.getap(1,function(table)
print("WiFi Scan Complete...")
local count,wtable=wifiutil.indexWiFiList(table)
print("Detected Usable WiFi: "..count)
print("Sorting WiFi..")
wtable=wifiutil.sortWiFiList(wtable,count)
local i=0
print("Loading Stored WiFi..")
local wconf=fileutil.loadWiFiConfig(wificonf)
while i<count do
local j=0
while wconf and wconf[j] do
if wtable[i].ssid==wconf[j].ssid and wtable[i].bssid==wconf[j].bssid then
print("Stored WiFi Matches with detected wifi no. "..i)
wifiTimeoutMon()
print("Configuring detected WiFi..")
wifi.sta.config({ssid=wtable[i].ssid,pwd=wconf[j].pwd,bssid=wtable[i].bssid})
print("Configured..Now Wait For IP...")
i=count;break
end
j=j+1
end
i=i+1
end
if i==count then
msg="Please Connect To WiFi.."
startPollSlave()
end
print("Leaving now..")
end)
else
print("WiFi Configurations not found...")
--startPollSlave()
end
else
print("Device Configurations not found...")
--startPollSlave()
end
Following are the debugging output....
dofile("init_test.lua")
Device Settings File found...
Device Configurations loaded...
WiFi Configurations found...
> WiFi Scan Complete...
Detected Usable WiFi: 4
Sorting WiFi..
Loading Stored WiFi..
Loading line 0
Stored WiFi Matches with detected wifi no. 0
Starting WiFi Timeout Monitor
WiFi Timeout Monitor Started..
Configuring detected WiFi..
Configured..Now Wait For IP...
Leaving now..
IP Received
WiFi Timout Monitor was Running...hence stopped
Device Configurations loaded...
Starting Server Timeout Monitor..
Started Server Timeout Monitor...
http post issued..now wait for server response...
HTTP client: Disconnected with error: -11
HTTP client: Connection timeout
HTTP client: Connection timeout
http server Timeout Occured...
Pollslave was not created...hence started...
Got:255 Heap Remaining:19840
Got:255 Heap Remaining:19840
Got:255 Heap Remaining:19840
Got:255 Heap Remaining:19840
...........
Got:255 Heap Remaining:1312
Got:255 Heap Remaining:1312
Got:255 Heap Remaining:1312
Got:255 Heap Remaining:1104
Got:255 Heap Remaining:1104
...........
Got:255 Heap Remaining:1104
E:M 520
PANIC: unprotected error in call to Lua API (not enough memory)
ets Jan 8 2013,rst cause:2, boot mode:(3,6)
load 0x40100000, len 27264, room 16
tail 0
chksum 0xc0
load 0x3ffe8000, len 2432, room 8
tail 8
chksum 0x7b
load 0x3ffe8980, len 136, room 0
tail 8
chksum 0xe0
csum 0xe0
