Bluetooth Fishfinder Project
In 2007, Sifferman Technology developed a hardware and software modification
to an existing black box fishfinder product.
The modification allowed the fishfinder to transmit its sonar data in real time
to a remote handheld PC using wireless Bluetooth technology.
The modification consisted of adding a small PCB to the fishfinder.
The PCB contained a PIC24 device and a Bluetooth transceiver.
Andy Sifferman designed the circuit and the PCB, and wrote the
firmware for the PIC to manage the Bluetooth communication between
the fishfinder and the handheld PC.
At the PC end of the wireless link, a Win32 application for Windows Mobile
devices was also written.
This application allowed the handheld PC to establish a Bluetooth link
with the modified black box fishfinder, and display a graphical
sonar image on the handheld device.
This application was fully functional, and gave the user the ability
to adjust the range and sensitivity of the black box fishfinder,
select automatic operation, etc.
Andy Sifferman designed and coded the Windows Mobile application,
including bi-directional communication with the Bluetooth API,
drawing the scrolling image on overlaid bit planes, and the design
of the icons, fonts, menus, and help text.
Here are some actual screen shots of the unit in operation. For these images,
the black box fishfinder was configured to transmit simulated data to the handheld