I try to access to informations stored inside a Trovan reader using R serial package via a serial port. Connexion seems to be effective since the reader red led is shortly activated when serialConnection function is run but
read.serialConnection function give an empty string instead of the expected tag code. Have someone any ideas ? below a link to the reader documentation and the R script.
Many thanks
http://www.vantro.biz/GR-250%20Computer%20Interface%20Manual.pdf
trovan<-serialConnection(NA,port = "com1", mode = "9600,N,8,1",translation = 'cr', handshake = 'xonxoff')
open(trovan)
res<-read.serialConnection(trovan)
close(trovan)
res
[1] " "
library(serial)
library(radio)###have to add some waiting time between each step
trovan<-serialConnection("get_rfid", port = "COM4", mode ="9600,N,8,1", newline = 1, translation = "cr", handshake = "xonxoff") ##windows os
open(trovan)
wait(1)
write.serialConnection(trovan,"N")
wait(2.5)
res<-read.serialConnection(trovan)
close(trovan)
Related
I am trying to enable CTR encryption in rocksdb 7.8.3 on Windows.
The history indicates it is possible using CreateFromString("CTR").
I am getting an error "NotFound: Missing configurable object: cipher"
it fails at the last line. I cannot find any examples or documentation for this. I am thinking I'm probably missing a crypto library of some kind.
thanks.
this is my code:
rocksdb::Status status;
rocksdb::ConfigOptions config_options;
std::string CTR = "CTR";
config_options.invoke_prepare_options = false;
std::shared_ptr<rocksdb::EncryptionProvider> provider;
status = rocksdb::EncryptionProvider::CreateFromString(config_options, CTR, &provider);
status = provider->AddCipher("", "a6d2ae2816157e2b3c4fcf098815f7xb", 32, false);
status = provider->PrepareOptions(config_options);
i'm currently making a roblox whitelist system and it's almost finished but i need 1 thing more i scripted it and its not work (code below) i didn't found nothing to fix what i have (script and screenshoot of error below), thanks.
local key = 1
local HttpService = game:GetService("HttpService")
local r = HttpService:RequestAsync({
Url = "https://MyWebsiteUrl.com/check.php?key="..key,
Method = "GET"
})
local i = HttpService:JSONDecode(r.Body)
for n, v in pairs(i) do
print(tostring(n)..", "..tostring(v))
end
I assume the website that you are using to validate the key
returns the response in raw if so then
local key = 1
local HttpService = game:GetService("HttpService")
local r = HTTPService:GetAsync("https://MyWebsiteUrl.com/check.php?key="..key)
local response = JSON:Decode(r)
print(response)
I think this is because you tried to concat a string (the url) with a number (the key variable) try to make the key a string
i am trying to run scollector from bosun.
after I run the scolector, It cannot show me the memory information, but CPU information was right.
this CODE:
Host = "http://localhost:8070"
DisableSelf = true
Freq = 60
Filter = ["snmp-generic", "snmp-ifaces"]
[[SNMP]]
Community = "test"
Host = "name"
MIBs = [ "devicename"]
[Tags]
product = "fw"
[MIBs]
[MIBs.fw]
BaseOid = ".1.3.6.1.4.1.2620"
[[MIBs.fw.Metrics]]
Metric = "os.cpu"
Oid = ".1.6.7.2.4.0"
Unit = "percent"
RateType = "gauge"
[[MIBs.fw.Metrics]]
Metric = "os.mem.used"
Oid = ".1.6.7.4.5.0"
Unit = "bytes"
RateType = "gauge"
THIS IS LOG
**2016/11/07 17:24:42 error: interval.go:64: snmp-generic-name-fw: asn1: structure error: tags don't match (2 vs {class:0 tag:4 length:11 isCompound:false}) {optional:false explicit:false application:false defaultValue:<nil> tag:<nil> stringType:0 timeType:0 set:false omitEmpty:false} #2**
2016/11/07 17:24:43 info: queue.go:90: {"metric":"os.cpu","timestamp":1478539482,"value":2,"tags":{"host":"name","product":"fw"}}
It looks to me like this is an issue converting data types. The error is from deep in the bowels of the asn1 library we are using but I think it boils down to: cpu is represented as an integer, while memory is a string.
Our snmp collector attempts to parse all values into a big.Int, but apparently the string value is not able to be coerced into that by our asn1 library.
Unfortunately I don't see a good way to make this work, except perhaps look for an oid that returns an integer type. Without knowing what device you are using, that is as good as I can offer I'm afraid.
I referred Sample app provided by Apple for CoreBluetooth and I succeeded in sending Data from Peripheral to Central, Now I need to write Data from Central to Peripheral. After Googling i found that It can be done using [_discoveredPeripheral writeValue:aData forCharacteristic:charc type:CBCharacteristicWriteWithResponse];
Following is my Implementation of Central, to send Message to peripheral:
-(void)sendMessage:(NSString *)strMessage{
NSData *aData = [strMessage dataUsingEncoding:NSUTF8StringEncoding];
CBMutableCharacteristic *charc =[[CBMutableCharacteristic alloc] initWithType:[CBUUID UUIDWithString:TRANSFER_CHARACTERISTIC_UUID] properties:CBCharacteristicPropertyWrite value:nil permissions: CBAttributePermissionsWriteable];
[_discoveredPeripheral writeValue:aData forCharacteristic:charc type:CBCharacteristicWriteWithResponse];
}
When I call this method, It is not able to write data, instead of that I can see a CoreBluetooth Warning on console as below,
CoreBluetooth[WARNING] <CBMutableCharacteristic: 0x15e8e420 UUID = 08590F7E-DB05-467E-8757-72F6FAEB13D4, Value = (null), Properties = 0x8, Permissions = 0x2, Descriptors = (null), SubscribedCentrals = (
)> is not a valid characteristic for peripheral <CBPeripheral: 0x15d91250 identifier = 37C314AF-FDB3-1F24-6937-8780B97AAB45, Name = "iPad", state = disconnected>
It would be nice if someone give the best way to get Object of Peripheral and how to initiate sending of data from Central to Peripheral.
EDIT
I have tried the way that is shown in How to get the characteristic from UUID in objective-C?
But, In this case I am not able to Loop Services whenever I try for that It returns services=nil.
I am presently using the streamR package in R to stream tweets from the filter stream in twitter. I have a handshaken ROAuth object that I use for this. My piece of code looks like:
# load the Twitter auth object
load("twitter_oAuth3.RData")
load("keywords3.RData")
streamTweet = function(){
require(streamR)
require(ROAuth)
stack = filterStream(file.name="",track=keywords,timeout=500,oauth=twitter_oAuth)
return(stack)
}
I wanted to create a real time application, which involves dumping these tweets into an activeMQ topic. My code for that is:
require(Rjms)
# Set logger properties
url = "tcp://localhost:61616"
type = "T"
name = "TwitterStream"
# initialize logger
topicWriter = initialize.logger(url,type,name)
topicWrite = function(input){
# print("writing to topic")
to.logger(topicWriter,input,asString=TRUE,propertyName='StreamerID',propertyValue='1')
return()
}
logToTopic = function(streamedStack){
# print("inside stack-writer")
stacklength = length(streamedStack)
print(c("Length: ",stacklength))
for(i in 1:stacklength){
print(c("calling for: ",i))
topicWrite(streamedStack[i])
}
return()
}
Now my problem is that of the timeout that filterStream() needs. I looked under the hood, and found this call that the function makes:
url <- "https://stream.twitter.com/1.1/statuses/filter.json"
output <- tryCatch(oauth$OAuthRequest(URL = url, params = params,
method = "POST", customHeader = NULL,
writefunction = topicWrite, cainfo = system.file("CurlSSL",
"cacert.pem", package = "RCurl")), error = function(e) e)
I tried removing the timeout component but it doesn't seem to work. Is there a way I can maintain a stream forever (until I kill it) which dumps each tweet as it comes into a topic?
P.S. I know of a java implementation that makes a call to the twitter4j API. I, however, have no idea how to do it in R.
The documentation for streamR package mentions that the default option for timeout option in filterStream() is 0 which will keep the connection open permanently.
I quote:
"numeric, maximum length of time (in seconds) of connection to stream. The
connection will be automatically closed after this period. For example, setting
timeout to 10800 will keep the connection open for 3 hours. The default is 0,
which will keep the connection open permanently."
Hope this helps.