#include "bme280.h" BME280::BME280(int gpioIdx){ //初始化设备 if ((fd = open(I2C_PATH, O_RDWR)) < 0) { perror("无法打开I2C设备!"); return; } if (ioctl(fd, I2C_SLAVE, gpioIdx) < 0) { perror("无法打开GPIO!"); close(fd); return; } if (i2c_smbus_read_byte_data(fd, IDENT) != 0x60) { perror("无法读取数据!"); close(fd); return; } i2c_smbus_write_byte_data(fd, SOFT_RESET, 0xB6); usleep(50000); setCompensationParams(fd); i2c_smbus_write_byte_data(fd, CTRL_HUM, 0x1); i2c_smbus_write_byte_data(fd, CONFIG, 0); i2c_smbus_write_byte_data(fd, CTRL_MEAS, 0x25); } bool BME280::ReadData(){ if ((i2c_smbus_read_byte_data(fd, 0xF3) & 0x9) != 0) { printf("%s\n", "无法读取温度数据!"); return false; } i2c_smbus_read_i2c_block_data(fd, DATA_START_ADDR, DATA_LENGTH, dataBlock); i2c_smbus_write_byte_data(fd, CTRL_MEAS, 0x25); return true; } double BME280::GetTemp(){ return BME280_compensate_T_double((dataBlock[3] << 16 | dataBlock[4] << 8 | dataBlock[5]) >> 4); } double BME280::GetPressure(){ return BME280_compensate_P_double((dataBlock[0] << 16 | dataBlock[1] << 8 | dataBlock[2]) >> 4)/100.f; } double BME280::GetHumidity(){ return BME280_compensate_H_double(dataBlock[6] << 8 | dataBlock[7]); } int main() { //初始化设备 BME280 b(0x76); httplib::Server sv; sv.Get("/", [&b](const httplib::Request &, httplib::Response &res) { b.ReadData(); char text[1024]="Unk"; sprintf(text,"" "" "" "" "" "" "" "

" "

🌡温度: %.2f C
💨气压: %.2f Pha
💧湿度: %.2f %rH

" "

" "" "" ,b.GetTemp(),b.GetPressure(),b.GetHumidity()); res.set_content(text, "text/html"); }); sv.listen("0.0.0.0", 1234); return 0; }