User's Manual
USER MANUAL 1.34
© 2013 EnOcean | www.enocean.com STM 300 / STM 300C / STM 300U User Manual | Page 5/42
STM 300 / STM 300C / STM 300U
compared to the last sending or in case of a significant change of measured analogue val-
ues (different input sensitivities can be selected). In case of no relevant input change a
redundant retransmission signal is sent after a user configurable number of wake-ups to
announce all current values. In addition a wake up can be triggered externally.
Features with built-in firmware
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
Product variants
STM 300 / STM 300C / STM 300U
Features accessible via API
Using the Dolphin API library it is possible to write custom firmware for the module.
STM 300/C/U is in-system programmable. The API provides:
Integrated 16 MHz 8051 CPU with 32 KB FLASH and 2 kB SRAM
Receiver functionality
Various power down and sleep modes down to typ. 0.2 µA current consumption
Up to 16 configurable I/Os
10 bit ADC, 8 bit DAC
2.2 Technical data
Antenna
External whip or 50 Ω antenna mountable
Frequency
STM 300: 868.300MHz (ASK)
1)
STM 300C: 315.000MHz (ASK)
1)
STM 300U: 902.875 MHz (FSK)
Data rate
125 kbps
Receiver Sensitivity (at 25 °C)
only via API
typ. –96 dBm
2)
(868.300 MHz)
typ. -98 dBm
2)
(315.000 MHz)
typ. -98 dBm
2)
(902.875 MHz)
Conducted Output Power
@50 min / typ /max
STM 300: 3.0 dBm / 5.7 dBm / 7.0 dBm
STM 300C: 5.5 dBm / 7.5 dBm / 9.5 dBm
STM 300U: -1 dBm / 1 dBm / 3dBm
3)
Power Supply
2.1 V–4.5 V, 2.6 V needed for start-up
Current Consumption
Deep Sleep mode : typ. 0.2 µA
Transmit mode: typ. 24 mA, max. 33 mA
Receive mode (via API only): typ. 33 mA, max. 43 mA
Input Channels
4x digital input, 2x WAKE input , 3x analog input
Resolution: 3x 8 bit or 1x 10 bit, 1x 8 bit, 1x 6 bit