The extremely power saving RF transmitter module STM 300 of EnOcean enables the realization of wireless and maintenance free sensors and actuators such as room operating panels, motion sensors or valve actuators for heating control. 

Features

• 3 A/D converter inputs
• 4 digital inputs
• Configurable wake-up and transmission cycle
• Wake-up via Wake pins
• Voltage limiter
• Threshold detector
• Application notes for calculation of energy budgets and management of external energy storages

Using the Dolphin API library it is possible to write custom firmware for the module. STM 300 / STM 300C is in-system programmable. 

Features accessible via API:

• Integrated 16MHz 8051 CPU with 32KB FLASH and 2kB SRAM
• Receiver functionality
• Various power down and sleep modes down to 0.2µA current consumption
• Up to 16 configurable I/Os
• 10bit ADC, 8bit DAC

more info: STM300