NRF905 433Mhz 무선 트랜시버 모듈
(NRF905 433MHz Wireless Transceiver Module)
개요
- NRF905는 멀티밴드 RF 트랜시버로 ISM 밴드를 사용하는 무선 모듈입니다.
- -100dbm의 감도를 가지고 있으며, 최대 50kbps의 데이터 속도를 가지고 있습니다.
- 초저전력으로 센서데이터 전송이나, 원거리 메터기 측정과 같은 어플리케이션에 사용이 적합합니다.
특징
- Operating voltage: 2.7 ~ 3.6V, not more than 3.6V (recommended 3.3V)
- Low-power, standby mode only 2.5uA
- Work on the 433MHz band, no need to apply frequency usage license.
- The maximum operating rate of 50kbps, support GFSK modulation
- A lower current consumption (Tx Out: 30mA< , RX in, 12.2mA, 433MHz)
- Rx Sensitivity: -100dBm Built-in hardware, 8 / 16 bit CRC checksum
- Channel switching time <650ms
- Programmable control of output power, for all the support frequencies of up to +10 dBm
- Standard DIP spacing interfaces for embedded applications
- Transmission Distance: open to the actual transmission distance 200-300 meters (depending on the specific situation of the environment and communication baud rate settings, etc. may be)
문서
- Documentation please visit our wiki page.
- NRF905 basic characteristics
Transmission and reception functions-one, send and receive complete interrupt flag
433/868/915 operating band, 433MHZ open ISM band is license-free use
The emission rate 50KBPS, the external 433 antenna, open communication distance up to 300 meters, indoor communicationthe 3-6 layer can achieve reliable communication, strong anti-interference performance, strong interference barrier penetrationperformance.
Sending and receiving 32 bytes maximum, can the software settings to send / receive buffer size 2/4/8/16/32 bytes
170 channels to meet the multi-point communication and frequency hopping communications needs, network telecommunication, TDMA-CDMA-FDMA
Built-in hardware 8/16 of the CRC, the development of a more simple, stable and reliable data transmission.
1.9-3.6V, low-power standby mode only 2.5uA.
Built-in SPI interface, or through the I / O port simulation SPI implementation. The highest SPI clock can be large 10M
/ / NRF905 the registers configuration / /
unsigned char idata RFConf [11] =
{
0x00, / / the Configuration command / /
0x4c, / / CH_NO, configure the frequency range of 430MHZ
0x0C, / / output power 10db, not retransmission power saving as the normal mode
0x44, / / address width set to 4 bytes
0x20, 0x20, / / receiver sending valid data length of 32 bytes
0xCC, 0xCC, 0xCC, 0xCC, / / receive address
0x58, / / CRC charge Xu, 8-bit CRC, the external clock signal is not enabled, 16M crystal
};
