A wireless data collection system design based on LPC2131 and IA4421 is introduced. The system consists of three parts:the slave device, host device and PC. LPC2131 ARM7 microcontroller is used as the slave device and host device's main controller. RF transceiver circuits operate at 433 MHz, the transmitting power is 5 dBm, the receive sensitivity is -100 dBm, the wireless data transfer rate is 9 600 bps. It has eight 10-bit and two 16-bit A/D conversion ports. One host device can perform wireless communications with 16 slave devices in the s...