I didn´t bound the PiThing to a Remote Thing...
And this are my files
the EMS:
{
"ws_servers": [{
"host": "34.200.94.171",
"port": 80
}],
"resource": "Thingworx/WS",
"http_server": {
"host": "127.0.0.1",
"port": 8080
},
"appkey": "c5bef579-93a5-40ea-a50a-712edf8c2dac",
"logger": {
"level": "TRACE | INFO "
},
"auto_bind": [{
"name": "PiThing",
}],
"certificates": {
"validate": false,
"allow_self_signed": true
},
"ws_connection": {
"encryption": "none",
"verbose": true,
"msg_timeout": 1000
}
}
The LSR:
scripts.log_level = "INFO"
scripts.PiThing = {
file = "thing.lua",
template = "PiTemplate" ,
identifier = "PiThing",
scanrate = 1000,
taskrate = 30000
}
scripts.rap_host = "127.0.0.1"
scripts.rap_port = 8080
and finally the template:
module ("templates.PiTemplate", thingworx.template.extend)
properties.cpu_temperature = { baseType= "NUMBER", pushType ="ALWAYS",value =0}
properties.cpu_freq = { baseType="NUMBER", pushType ="ALWAYS", value=0}
properties.cpu_volt = {baseTypes = "NUMBER", pushType="ALWAYS",value=0}
serviceDefinitions.GetSystemProperties(
output { baseType = "BOOLEAN", description = ""},
description { "updates properties" }
)
-- service input parameters
-- me: table that refers to the Thing
-- headers: table of HTTP headers
-- query: query parameters from the HTTP request
-- data: lua table containing the parameters to the service call.
services.GetSystemProperties = function(me, headers, query, data)
log.trace("[PiTemplate]","########### in GetSystemProperties#############")
queryHardware()
-- if properties are successfully updated, return HTTP 200 code with a true service return value
return 200, true
end
function queryHardware()
-- use the vcgencmd shell command to get raspberry pi system values and assign to variables
-- measure_temp returns value in Celsius
-- measure_clock arm returns value in Hertz
-- measure_volts returns balue in Volts
local tempCmd = io.popen("vcgencmd measure_temp")
local freqCmd = io.popen("vcgencmd measure_clock arm")
local voltCmd = io.popen("vcgencmd measure_volts core")
-- set property temperature
local s = tempCmd:read("*a")
s = string.match(s,"temp=(%d+\.%d+)");
log.debug("[PiTemplate]",string.format("temp %.1f",s))
properties.cpu_temperature.value = s
-- set property frequency
s = freqCmd:read("*a")
log.debug("[PiTemplate]",string.format("raw freq %s",s))
s = string.match(s,"frequency%(45%)=(%d+)");
s = s/1000000
log.debug("[PiTemplate]",string.format("scaled freq %d",s))
properties.cpu_freq.value = s
-- set property volts
s = voltCmd:read("*a")
log.debug("[PiTemplate]",string.format("raw volts %s", s))
s = string.match(s,"volt=(%d+\.%d+)");
log.debug("[PiTemplate]",string.format("scaled volts %.1f", s))
properties.cpu_volt.value = s
end
tasks.refreshProperties = function(me)
log.trace("[PiTemplate]","~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In tasks.refreshProperties~~~~~~~~~~~~~ ")
queryHardware()
end
