Upgrading the Main Mossel Bay Mesh Network Node to a Mobile or Portable Unit. (4 November 2018)
As devastating fires raged in parts of the Garden Route District (the first fire started at Herold on the 24 October 2018) and are still active, I decided to upgrade the Main Mossel Bay Mesh Network Node. Work on this project started long before the fire outbreak but having time on hand while on standby I daily worked on the project. Herewith a few images. I am still working on the unit even while the unit is now fully operational.
Work is still in progress and I am busy replacing the power supplies of the raspberry Pi, AP and Switch . This post will be updated with more images as the work progress.
Real Time Clock DS3231 added to the Mossel Bay Mesh Server (16 June 2017)
The DS3231M is a low-cost, extremely accurate I2C real-time clock (RTC) with temperature compensation. It incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted.
The RTC maintains seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred through an I2C bus.
I added and RTC module to the Mossel Bay Mesh Server. We now have a time stamp on Mumble as well as the Mossel Bay Mesh Weather Camera and any other device that uses a time reference.
Here is a few images of the project.
Mossel Bay Weather Camera Project (30 May 2017)
10 Turn Helical 5.8 Ghz Antenna Construction Project (15 May 2017)
Please note a BNC connector is not to be recommended for use on 5.8 Ghz operations, but at the time this is what I had in my junkbox. The last photo show the antenna installed. In my opinion this antenna works just as well as the grid antenna in the direction of the QTH of Johan ZS2I. I will test it later in a shootout over longer distances. Price-wise the Grid would set you back well over a R1000.00 while the 10 Turn Helical cost me nothing as I had all the parts in the junkbox. If I had to put a price on the antenna it might cost you less than R100.00 Final note: We are working with the Ghz spectrum and all measurements must be very accurate. One millimeter to long or short will effect the antenna’s performance greatly. Connectors and co-ax cable must be of the highest standard and suitable for the Ghz frequencies. No margin for error and sloppy work here!