scd4x_read
ret = scd4x_read(state, CMD_READ_MEAS, buf, sizeof(buf));
ret = scd4x_read(state, CMD_GET_DATA_READY, &bval, sizeof(bval));
ret = scd4x_read(state, CMD_GET_AMB_PRESSURE, &tmp, sizeof(tmp));
ret = scd4x_read(state, CMD_GET_TEMP_OFFSET, &tmp, sizeof(tmp));
ret = scd4x_read(state, CMD_GET_ASC, &bval, sizeof(bval));