this ti design uses texas instruments nano-power system timer, simplelink ultra-low power wireless microcontroller (mcu) platform, and humidity sensing technologies to demonstrate an ultra-low power method to duty-cycle sensor end nodes.

these technologies lead to an extremely long battery life: over 10 years with a standard cr2032 lithium ion coin cell battery. the ti design includes techniques for system design, detailed test results, and information to get the design up and running quickly.

features

• use of nano-power system timer to duty-cycle the system results in 10+ year battery life from cr2032 coin cell
• configurable system wakeup interval
• extremely low off-state current (183 na for 59.97 seconds)
• ultra low on-state current due to low active processor and radio transmit currents (4.04 ma for 30 ms)
• ±2% relative humidity accuracy