Now even with the PPS signal, being delivered into an interrupt driven kernel routine specifically written for high precision timing, I still dont get close to nanosecond level precision or accuracy. Next insert the power plug into the Intel® Edison board and the other end into a power outlet. Plug in the 220V->11.5V converter for the heat lamp it will not turn on until the Intel® Edison switches the relay on. Otherwise the time would be lagging approx 200ms from the real time. Now you can power on the board and the lamp. In the ntp configuration file itself, I have specificed an offset calibration factor of approx 200milliseconds in order to bring the two into somewhat of an alignment. You might think its only a 1.2millisecond difference to the PPS, but its not so.
The SHM (GPS) line is the time derived from strings sent via the GPS receiver over the serial port. Computer equipped with supported operating system: macOS 10. ACCOUNTINGTV - Multiple Account Assignment in. Download CoolTerm - An easy-to-use terminal software that allows you to send messages to any hardware connected to the serial ports of your computer. Fields Acct Assgmt IM Delivery Completed - BAdI Flds. ACCOUNTINGBADI - Purchasing Fields for Account Assignment in IM - BAdI Fields. Remote refid st t when poll reach delay offset jitter To configure goSerial, click the light switch in the Toolbar and select your USB-Serial device as the Serial Port. There is no terminal emulation (eg, VT100) support. Post any questions/problems you run into if anyone is interested! goSerial goSerial can open multiple connections simultaneously, send and receive files, log sessions, and it supports scripting. Of course there is about a 1 second delay before the data is actually transmitted and printed to the computer screen so you will still only see accuracy of about 1 second if you are viewing the live data output of your device. This first number after the comma is UTC time that is accurate within about a nanosecond, depending on your GPS unit. You will see many different line prefixes, but my bet would be that almost all devices will output a line that starts with $GPRMC, then a number (such as 123519).ĩ. Read through your output and see which types of data your device is outputting. Read the section at entitled "Decode of selected position sentences".Ĩ. Now pause the readout by pressing the same button so that you can read through the output and interpret it.ħ. You should now see a bunch of text scrolling across the screen (if your GPS receiver has a valid fix).Ħ. Now click OK and press the button in the top right corner that looks like a plug. This means that we must set the speed (baud rate) to 4800, Data Bits to 8, Parity to none, and Stop Bits to 1.ĥ. Now we must set up the COM port settings as per the NMEA communication standard as detailed at. Under the "Port" tab choose the name of your newly-paired BT GPS reciever.Ĥ. Launch the app and you should see a configuration dialog.
This software can send and receive serial data from any serial port in your mac (including bluetooth serial ports).ģ. Download the cool software from furrysoft called goSerial at. Pair your bluetooth receiver using the normal setup assistantĢ.
Other features include full ANSI/VT100 terminal emulation, break-sequence support (for Cisco, etc), a line-buffered send mode, a fully featured SSH/Telent client, and much more.I have figured it out, and the solution is very geeky! For those fellow nerds who are interested and have a bluetooth and/or USB/Serial GPS reciever:ġ.
If you can't find an OS X driver for yourĪdapter (eg, Belkin), give Serial a try as it'll probably work! The free demo is fully functional for 7 days. Serial Serial is a great Terminal Emulation Program with built-in driver support for most USB to serial devices. The Send-RDUserMessage cmdlet sends a system message to a specified user session.
Or, ctrl-click/right-click on the app and select Open from the pop-up menu so not to permanently lower your security settings. In this article Syntax Send-RDUser Message -HostServerIf you have trouble installing any of the following (or any other program) with an unidentified developer error, goto: System Preferences ➤ Secrity & Privacy ➤ General and click on Allow Applications Downloaded from: Anywhere and try again. If you can't find a driver for your adapter (eg, Belkin), try Serial which has built-in support for most (if not all) USB-Serial adapters. If you're looking for a command line app, there's Screen (built-in) or Minicom.
The following Mac OS X GUI applications are available:
Having installed the right driver for our USB-serial adapter, we also need to install some terminal emulation software before we can connect to anything.