Revision 03 Nodes

A project log for SubPos Positioning System

A "dataless" Wi-Fi positioning system that can be used anywhere GPS can't.

BleckyBlecky 08/26/2015 at 15:040 Comments

Update 3:

The firmware is now complete and has extra code to also passthrough (USB to UART) to the ESP for manual control and flash/bootloader operation. One final thing left to do is get the PIC flashing over USB. I will have this done in the next week or so.

Update 2:

The firmware is coming along nicely. USB CDC (serial) device is enumerating (and doesn't take up too much program space with the xc8 free compiler):


They have arrived and I am currently testing one of the assembled boards:

Working and sucessfully controlling ESP module power:

Just a quick update to say the revision 03 Nodes are out for production:

These will feature a USB based UART, USB power, MCU bootloader button (for flashing MCU), remote configuration button and ESP power control using a low Vce BJT transistor. Revision 04 is currently in development and will favour something other than the ESP module for tighter control over the beacon frames.