RC-S2LP-XXX module is based on STMicroelectronics S2-LP transceiver.
This device is a high performance ultra low power RF transceiver designed for RF wireless application in the sub 1GHz band.
The module is designed for maximum performance in a minimal space, with 4 programmable I/O pins.
Programmable from external microcontroller via SPI interface.
For more information and details, please refer to the S2-LP datasheet (www.st.com).
N.3 Versions available :
- RC-S2LP-434 Freq. : 433MHz
- RC-S2LP-868 Freq. : 868MHz
- RC-S2LP-915 Freq. : 915MHz
Sub-1Ghz technology is becoming one of the chief driving forces behind the Internet of Things (Iot), in particular this type of module is ideal for this applications basically for the following reasons :
- Ultra low power consumption, the consumption of this device is 7mA when receiving and 20mA when transmitting at +14dBm (11mA at +10dBm) in sleep mode the consumption is 0.7µA.
- Long range operations, the sensitivity parameter is -109dBm at data rates of 38.4 kbps and down to -128dBm when the data rate is 0.3kbps. Interference from other wireless communications can be overcome with 90dB of blocking. The RF output power levels can reach up to +16dBm. All this ensure a robust signaling for long range communications.
- Ready for use SMD mounting (15x 22mm)
- Metal shield.
| Technical Characteristics |
MIN |
TYP |
MAX |
UNIT |
| Supply Voltage |
1.8 |
3.0 |
3.60 |
Volt |
| Supply Current RX mode |
|
7.2 |
|
mA |
| Supply Current TX mode -----> +10dBm |
|
11 |
|
mA |
| Supply Current TX mode -----> +14dBm |
|
20 |
|
mA |
| Supply Current Standby Mode |
|
0,5 |
|
µA |
| Supply Current Shut Down Mode |
|
2.5 |
|
nA |
| Operative Frequency |
|
868 |
|
MHz |
| RF Power Output 50ohm (programmable parameter) |
-30 |
|
+16 |
dBm |
| RF Sensitivity 38.4kbps 2GFSK |
|
-109 |
|
dBm |
| RF Sensitivity 0.3kbps 2GFSK |
|
-128 |
|
dBm |
| Operating Temperature range |
-30 |
|
+75 |
°C |
| Pads |
Name |
Description |
Pin Type |
| 1 |
SDO |
SPI slave data output |
Digital out |
| 2 |
SDI |
SPI slave data input |
Digital in |
| 3 |
SCLK |
SPI slave clock input |
Digital in |
| 4 |
CSn |
SPI chip select |
Digital in |
| 5 |
GPIO-0 |
General purpose I/O configurable through SPI registers |
Digital I/O |
| 6 |
GPIO-1 |
General purpose I/O configurable through SPI registers |
Digital I/O |
| 7 |
GPIO-2 |
General purpose I/O configurable through SPI registers |
Digital I/O |
| 8 |
GPIO-3 |
General purpose I/O configurable through SPI registers |
Digital I/O |
| 9 |
GND |
Connect to GND |
Ground pin |
| 10 |
SDN |
Shutdown input pin |
Digital in |
| 11 |
GND |
Connect to GND |
Ground pin |
| 12 |
GND |
Connect to GND |
Ground pin |
| 13 |
VCC |
1.8Volt to 3.6Volt |
Power Supply |
| 14 |
VCC |
1.8Volt to 3.6Volt |
Power Supply |
| 15 |
GND |
Connect to GND |
Ground pin |
| 16 |
GND |
Connect to GND |
Ground pin |
| 17 |
GND |
Connect to GND |
Ground pin |
| 18 |
GND |
Connect to GND |
Ground pin |
| 19 |
GND |
Connect to GND |
Ground pin |
| 20 |
ANT |
Connect to external Antenna |
Antenna |
| 21 |
GND |
Connect to GND |
Ground pin |
EVALUATION BOARD -----> RC-S2LP-XXX-EW
The RC-S2LP-XXX-EW is an evaluation board based on the RC-S2LP-XXX module.
The Evaluation board can be used instead of those provided by the chip manufacter (www.st.com) denominated STEVAL-FKIXXXV2.
With this board it is possible to use all the SW resources provided for the development activity, in particular :
- STSW-S2LP-DK (S2-LP-DK Application Notes)
- STSW-S2LP-SFX-DK (S2-LP SigFox Demo)
RC-S2LP-XXX signal test points are split across two rows which are Arduino compliant connectors: CN1, CN2 and Cn3, CN4. The RC-S2LP-XXX shield is connected to the Nucleo motherboard via the Arduino compliant connectors.
