WL-325 STC15F204 + NRF905 Wireless Serial Modules Combo for Micro Controllers

STC15F204 + NRF905 Wireless Serial Modules Combo for Micro Controllers

This small kit is a combination of the STC15F204, the NRF905 and a small WIFI antenna. The first being the interface driver board and the second being the transceiver module. This kit allows you to add WIFI feature to your microcontroller such as the Arduino UNO.

NRF905 Transceiver

• 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 communication the 3-6 layer. can achieve reliable communication, strong anti-interference performance, strong interference barrier penetration performance.
• 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