low power wireless communication module sim20SIM20 is a high integrate half-duplex, multi-channel low power wireless communication module. It includes high speed MCU and perfect performance RF chip, so it has high receiving sensitivity, programmable transmitting power and data rate. SIM20 supports the multi-channel choice, transparent date transfer without complex user setting; It supports UART, IIC, SPI, GPIO interfaces.

The leading features of the module make it ideal for industry applications such as automatic metering, wireless medical telemetry service (WMTS), home automation and process and building control.

General features
Dimensions: 21*13.8*2.6 mm
Weight: 1.5 g
Normal operation temperature: -40deg C to +80 deg C
Storage temperature: -45deg C to +90 deg C
Low power consumption
Flexible software programmable setting option
Specifications for SRD RF
Maximum transmit power: 18 dBm (except SIM20-433)
Receive sensitivity: -118dBm @2400BPS
Transmission distance: 1500 Meters @9600BPS (SIM20-A, open sky)
Frequency bands support as below:

SIM20-A: 433~434.79MHz
SIM20-B: 863~870MHz
SIM20-C: 902~928MHz
SIM20-470: 470.00~510.00MHz
SIM20-433: 433.05~434.79MHz
SIM20-868: 868.00~869.70MHz
Modulation schemes: GFSK
Frequency interval: 100kHz
Sleep current consumption: 1uA
Rx current consumption: 26mA
Tx current consumption: 80mA@18dBm, peak value
Support peer to peer transmission and broadcasting transmission
Adapt to mass data transmission
Interfaces
22 SMT pads include:
Power pad and ground pads
Antenna Interface
UART Interface
SPI Interface (reserved)
IIC Interface (reserved)

Specification for Data
Air interface data rate: 2400~128000BPS
Uart interface data rate: 2400~115200BPS
Uart interface check mode: 8N1, 8E1, 8O1, 7N2, 7E1, 7O1
Uart RX interface buffer size: 255 bytes
Standard
ETSI EN 300-220
FCC Part 15
Chinese SRD regulatory standards

Certifications
RoHS
CE (SIM20-433, SIM20-868)