sgp_read_cmd
ret = sgp_read_cmd(data, data->measure_iaq_cmd, &data->iaq_buffer,
ret = sgp_read_cmd(data, data->iaq_init_cmd, NULL, 0,
ret = sgp_read_cmd(data, data->measure_gas_signals_cmd,
ret = sgp_read_cmd(data, SGP_CMD_GET_FEATURE_SET, &data->buffer, 1,