I am using ThingWorx to reach out to my Raspberry Pi and try to retrieve motion data from a PIR Sensor connected to the Raspberry Pi. It communicates via Lua Script. To test it out I created a Lua Script separate from the ThingWorx server and used the 'periphery' module to access the input from the GPIO pin. It works fine. But when running the script through the EMS for ThingWorx, I get the error 'Error: error loading module 'periphery' from file 'usr/local/lib/lua/5.1/periphery.so: undefined symbol: lua_gettop'
Here is a snippet of the code that works on its own but not when used for the EMS:
local GPIO = require('periphery').GPIO
local GPIO_in = GPIO(4,"in")
local value = GPIO_in:read()
Edit: I did not solve that particular error, but I solved my issue by just running the lua script on its own, sending that data to a txt file, then in the lua script for the EMS, I just read the data from the txt file to be able to send to ThingWorx.
Related
I'm working on a personal project and I'm trying to get Lua to work on my embedded device.
I have my own simple file system that works with the the flash drive, and now I'm trying to use modules for the lua scripts that I run on the device.
I have edited linit.c, to make it also load the modules that are existing in the flash drive, and it works for a few modules, but for most of them it just gives me a syntax error when it parses the contents of the module. I have a lua interpreter running on my Windows machine and the code I'm writing is syntactically correct and works, and the Lua API that I use is of the same version 5.4 on the device.
These are the arguments I pass to
luaL_loadbufferx(L, luaCFunction, sizeOfModule, moduleName, "t")
where, L is the lua state, luaCFunction is the lua module wrapped in a C-style return statement, sizeOfModule, moduleName and t is selfexplanatory.
Right now luaL_loadbufferx is called in a loop for every module in my flash-drive, I have overwritten the openf function from the Lua API for these external modules.
This below is one of the examples of a module that gives me
"Syntax Error: PANIC, unprotected error in call to Lua API
[string "module"]:3: '(' expected near 'writeobj'"
File: module.lua
Contents:
function writeobj()
print('Hello World')
end
File: run.lua
Contents:
require ('module')
writeobj()
Does anyone know why this happens or did I not provide sufficient information? Please let me know.
The problem was that I thought the modules passed to the buffer had to be of the LuaToC form, i.e. "return { ...luamodule...}", but changing it to pass the module only to loadbuffer was sufficient enough because it covers the case of it not being in a C style return format.
I'm looking the way how to record screen on Robot framework Appium.I've check on Appium Robot Framework Doc but it doesn't describe about it but i have try to write custom lib with python but it's doesn't support.
import os
import subprocess
from appium import webdriver
from robot.api import logger
desired_caps = {}
desired_caps['platformName'] = 'iOS'
desired_caps['platformVersion'] = '12.3.2'
desired_caps['bundleId'] = 'xxxxxx'
desired_caps['udid'] = 'xxxxxxx'
desired_caps['deviceName'] = 'iPhone'
driver = webdriver.Remote("http://localhost:4723/wd/hub",desired_caps)
def start_screen_recording():
driver.start_recording_screen()
def stop_screen_recording():
filepath = os.path.join("/Users/keo.sidara/Desktop/Mobile_Test/testcases/regression", "screen_recording_110918-205655.mp4")
warning_message(filepath)
payload = driver.stop_recording_screen()
with open(filepath, "wb") as fd:
fd.write(base64.b64decode(payload))
and i got message
[W3C] Matched W3C error code 'invalid session id' to NoSuchDriverError
[W3C (1530275d)] Encountered internal error running command:
NoSuchDriverError:
Anybody experience with it ? please share me. Thanks
The Appium documentation on the start Recording method is here.
In the AppliumLibrary documentation the source code for keyword Open Application shows that the keyword returns number of the application in the registry.
This means that there is no AppiumLibrary supported way of retrieving the webdriver. This means that a modification to the original library is needed. This has been done already in a fork: nichotined / robotframework-appiumlibrary
Removing the original library from your python installation and installing this one, you then have access to the keyword Get Current Application that returns the driver. Now, you can use the below approach or add another keyword yourself in the same fashion to create the custom Start and Stop Screenrecording.
As I don't have a working Appium Setup, I'm unable to validate this myself:
*** Settings ***
Library AppiumLibrary
*** Test Cases ***
Open Application
... http://localhost:4723/wd/hub
... alias=Myapp1
... platformName=iOS
... platformVersion=7.0
... deviceName='iPhone Simulator'
... app=your.app
${driver} Get Current Application
Call Method ${driver} start_recording_screen
As of robotframework-appiumlibrary v1.5.0.6, support for screen recording has been implemented. Can check https://serhatbolsu.github.io/robotframework-appiumlibrary/AppiumLibrary.html#Start%20Screen%20Recording.
Happy Coding!
I've never used Robot Framework before but I tried a lot of ways to record with the appium driver but I couldn't get it working. The only solution that I found was to use ADB SHELL Commands to record the screen of a device. You should have in mind that not all devices are capable of getting their screen recorded.
adb shell screenrecord /sdcard/test.mp4 --size 480x720 #To start recording
Once you kill the process above you can get the video from the device with these commands
adb pull /sdcard/test.mp4 "C:/"
adb shell rm /sdcard/test.mp4
I am using sky motes in cooja simulator of contiki. I want to use collect-view. So I added few sky motes in a simulation and right clicked one of the nodes to start collect-view. Then I clicked 'Program-Nodes' button.
I got the following error:
Programming failed: java.io.IOException: Failed to execute './tools/motelist-linux'.
For sky motes, I noticed the motelist-linux file is here. So I updated the lines to
public static final String MOTELIST_LINUX = "./tools/sky/motelist-linux";
public static final String MOTELIST_MACOS = "./tools/sky/motelist-macos";
I have verified that motelist-linux & motelist-macos files have necessary permissions. But I got the same error again.
Programming failed: java.io.IOException: Failed to execute './tools/sky/motelist-linux'.
How do I get rid of the error? or
Is there any other way to use collect-view?
You need sudo permissions for accessing serial port in linux. Please open cooja with sudo and try. it might work. There is another possibility that serial port of the mote might be opened by another application. Make sure that no other application is using serial port of the mote which you are trying to program.
Credits: https://github.com/contiki-os/contiki/issues/2198
I'm new to Lua altogether, and this is my first attempt at writing a wireshark dissector.
I want to analyze SSH without cipher by Lua script. I write a script to detect the packet length and padding length for the first step.
Here is my script:
do
local p_test = Proto("test","Test.");
local f_packet_length = ProtoField.uint32("packet_length")
local f_padding_length = ProtoField.uint8("padding_length")
p_test.fields = {
f_packet_length,
f_padding_length
}
function p_test.dissector(buf,pkt,root)
local offset = 0
local buf_len = buf:len()
local t = root:add(p_test, buf:range(offset))
t:add(f_packet_length,buf:range(offset,4))
offset = offset+4
t:add(f_padding_length,buf:range(offset,1))
offset = offset+1
end
local tcp_table = DissectorTable.get("tcp.port")
tcp_table:add(22,p_test)
end
After I run the code through Evalutate Lua and applied the test filter, I find that there is an error in Packet Details:
Lua Error: [string "do..."]:19: Tree item ProtoField/Protocol handle is invalid (ProtoField/Proto not registered?)
Line 19 corresponds the t:add(f_packet_length... line.
Could anyone help to explain this error?
Thanks in advance.
Your code above will work fine if it's in a real Lua script for Wireshark... either by being in a .lua file in the personal plugins directory, or by being loaded with the "-X lua_script:<filename>" command line switch.
But you can't register a new protocol in the tools->evaluate window, because it's too late by then to register a new protocol (or new fields). Unfortunately the error Wireshark reports isn't clear about that, because it sort of half works, but really it's not working and cannot work.
The problem is new protocol registration happens in two phases internally: the first phase is when the Lua scripts are loaded and executed, which adds the protocol and fields to an internal temporary table, and then after all the lua scripts load then the second phase has new protocols and fields moved from the temporary table into their final run-time tables and registered, and then wireshark finishes loading and you see the GUI. That second phase happens once and only once, when Wireshark first starts up. But running the tools->evaluate window happens after all that, so it's too late.
I´m newbie with Thingsquare
I'm traying to create a IP64 Gateway with MB851 Board (STM32W108CC microprocessor)
I send and receive data (IPv6 Radio) using 2 MB851 Boards with Thingsquare udp-multicast example.
I modified mist-mb851 platform to include an enc28j60-arch.c file to implement the platform code of SPI functions that are called by the enc28j60 driver
I modified ip64-conf.h to include enc28j60 driver and fallback interface
include "ip64-eth-interface.h"
include "enc28j60-ip64-driver.h"
define IP64_CONF_UIP_FALLBACK_INTERFACE ip64_eth_interface
define IP64_CONF_INPUT ip64_eth_interface_input
define IP64_CONF_DHCP 1
define IP64_CONF_ETH_DRIVER enc28j60_ip64_driver
I modified Contiki/platform/mb851 to include STM32 PeripheralLibs to create the SPI driver
The enj28j60 driver is tested
I compile the Thingsquare Router-Node example but when initialize the DHCP process
ip64_init();--->ip64_ipv4_dhcp_init();--->ip64_dhcpc_request();--->handle_dhcp();--->send_discover();
Nothing happens
Debugging the code when tcpip_ipv6_output(); function is call to send the packet the function ip64_6to4(...); fails and i don´t know why
Best Regards