SIM20 is a high integrated half-duplexï¼ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂŒmulti-channel low power wireless communication module. It includes high speed MCU and perfect performance RF chip with high receiving sensitivity, programmable transmitting power and data rate. SIM20 supports the multi-channel choice, transparent date transfer without complex user setting and UART(CMOS/TTL)、RS232、RS485、IIC/SPI,ADC interface.

The leading features of the module make it ideal for industrial applications such as automatic meteringï¼ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂŒwireless medical telemetry serviceï¼ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂŒhome automationï¼ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂŒprocess and building control.
 
General Features
• Standard
– ETSI 300-220, FCC Part 15,
• Support peer to peer transmission and broadcasting transmission
• Optional 16bits RFID
• Flexible software programmable setting option
• Frequency bands support
– 433MHz – 434.79MHzï¼ÂˆSIM20-A)
– 863MHz – 870MHz(SIM20-B)
– 902MHz – 928MHz(SIM20-C)
• Modulation schemes: 2GFSK
• Frequency interval: 200KHz
• transmission distance: 1000 Meters@1200bps
• Transmit power: 20mW, 10 steps adjusting
• Receive sensitivity: -115dBm@1200bps
• Sleep current consumption: 5uA
• Tx current consumption: 35mA@10dBm
• Rx current consumption: 28mA
• Input voltage of the module: 3.3Vï½Âž5.5V(±50mV)
• Physical Dimensions: 40mm×20mm×2.8mm
• Operation temperature: -20℃ to +70℃
• Storage temperature: -40℃ to +85℃
• Humidity: 10%ï½Âž90%
• Air date rate: 1200 – 115200bps
• Interface date rate:
– 1200 – 115200bps
– RS232/RS485
• Interface check mode: 8E1/8N1/801
• Interface buffer size: 512bytes

Interfaces:
• RS485 Interface
• UART(CMOS/TTL) Interface
• RS232 Interface
• IIC Interface
• SPI Interface
• ADC Input