South Coast deployments
telosB (SSg version with TinyOS and Manchester's code) - future system can be homebrew or off the shelf nodes.
for sea sensing on sea defences - conductivity sensor for splashes and long rough water depth sensor
and/or a long water height sensor to detect waves at high frequency
See our contiki pages for using it on the sky/telosB
GW10 node prototypes
its conductivity sensor (based on oscillator and amp) is now available as a small pcb with Vout.
Uses AC signal and amplifier to smooth result.
needs 2mA at 3V so can be powered from telosB GPIO (max rated 6mA)
outputs from about 1.4 to 2.8V
GND sense sense output power
so we use telosB 10 pin I/O:
pin7=GIO1 as power
pin3=ADC0 to output